2483fa2719
connect_state and af_local_connect connect call here, once, independent of FD_CONNECT being requested. Add comment to explain why. (fhandler_socket::connect): Drop connect_state handling and calling af_local_connect. Move remaining AF_LOCAL stuff prior to calling ::connect and explain why. Simplify error case. * poll.cc (poll): Handle connect state independently of POLLOUT being requested for the descriptor to allow setting POLLIN if connect failed. Add comment. * select.cc (set_bits): Drop connect_state and AF_LOCAL handling here.
1740 lines
42 KiB
C++
1740 lines
42 KiB
C++
/* select.cc
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
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2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 Red Hat, Inc.
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This file is part of Cygwin.
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|
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
|
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details. */
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/* The following line means that the BSD socket definitions for
|
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fd_set, FD_ISSET etc. are used in this file. */
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|
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#define __INSIDE_CYGWIN_NET__
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#include "winsup.h"
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#include <stdlib.h>
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#include <sys/param.h>
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#include "ntdll.h"
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|
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#define USE_SYS_TYPES_FD_SET
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#include <winsock2.h>
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#include <netdb.h>
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#include "cygerrno.h"
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#include "security.h"
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#include "path.h"
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#include "fhandler.h"
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#include "select.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "pinfo.h"
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#include "sigproc.h"
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#include "cygtls.h"
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#include "cygwait.h"
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|
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/*
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* All these defines below should be in sys/types.h
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* but because of the includes above, they may not have
|
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* been included. We create special UNIX_xxxx versions here.
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|
*/
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|
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#ifndef NBBY
|
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#define NBBY 8 /* number of bits in a byte */
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#endif /* NBBY */
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|
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/*
|
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* Select uses bit masks of file descriptors in longs.
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* These macros manipulate such bit fields (the filesystem macros use chars).
|
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* FD_SETSIZE may be defined by the user, but the default here
|
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* should be >= NOFILE (param.h).
|
|
*/
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|
|
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#define UNIX_NFDBITS (sizeof (fd_mask) * NBBY) /* bits per mask */
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#ifndef unix_howmany
|
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#define unix_howmany(x,y) (((x)+((y)-1))/(y))
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#endif
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|
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#define unix_fd_set fd_set
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|
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#define NULL_fd_set ((fd_set *) NULL)
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#define sizeof_fd_set(n) \
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((size_t) (NULL_fd_set->fds_bits + unix_howmany ((n), UNIX_NFDBITS)))
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#define UNIX_FD_SET(n, p) \
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((p)->fds_bits[(n)/UNIX_NFDBITS] |= (1L << ((n) % UNIX_NFDBITS)))
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#define UNIX_FD_CLR(n, p) \
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((p)->fds_bits[(n)/UNIX_NFDBITS] &= ~(1L << ((n) % UNIX_NFDBITS)))
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#define UNIX_FD_ISSET(n, p) \
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((p)->fds_bits[(n)/UNIX_NFDBITS] & (1L << ((n) % UNIX_NFDBITS)))
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#define UNIX_FD_ZERO(p, n) \
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memset ((caddr_t) (p), 0, sizeof_fd_set ((n)))
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|
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#define allocfd_set(n) ({\
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size_t __sfds = sizeof_fd_set (n) + 8; \
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void *__res = alloca (__sfds); \
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memset (__res, 0, __sfds); \
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(fd_set *) __res; \
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})
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|
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#define copyfd_set(to, from, n) memcpy (to, from, sizeof_fd_set (n));
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|
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#define set_handle_or_return_if_not_open(h, s) \
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|
h = (s)->fh->get_handle (); \
|
|
if (cygheap->fdtab.not_open ((s)->fd)) \
|
|
{ \
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(s)->thread_errno = EBADF; \
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return -1; \
|
|
}
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|
|
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static int select (int, fd_set *, fd_set *, fd_set *, DWORD);
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|
|
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/* The main select code. */
|
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extern "C" int
|
|
cygwin_select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
|
|
struct timeval *to)
|
|
{
|
|
select_printf ("select(%d, %p, %p, %p, %p)", maxfds, readfds, writefds, exceptfds, to);
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|
|
|
pthread_testcancel ();
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int res;
|
|
if (maxfds < 0)
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|
{
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set_errno (EINVAL);
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res = -1;
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}
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else
|
|
{
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/* Convert to milliseconds or INFINITE if to == NULL */
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|
DWORD ms = to ? (to->tv_sec * 1000) + (to->tv_usec / 1000) : INFINITE;
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if (ms == 0 && to->tv_usec)
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ms = 1; /* At least 1 ms granularity */
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|
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if (to)
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select_printf ("to->tv_sec %ld, to->tv_usec %ld, ms %d", to->tv_sec, to->tv_usec, ms);
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else
|
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select_printf ("to NULL, ms %x", ms);
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res = select (maxfds, readfds ?: allocfd_set (maxfds),
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writefds ?: allocfd_set (maxfds),
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exceptfds ?: allocfd_set (maxfds), ms);
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}
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syscall_printf ("%R = select(%d, %p, %p, %p, %p)", res, maxfds, readfds,
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writefds, exceptfds, to);
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return res;
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}
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/* This function is arbitrarily split out from cygwin_select to avoid odd
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gcc issues with the use of allocfd_set and improper constructor handling
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for the sel variable. */
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static int
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select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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DWORD ms)
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{
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int res = select_stuff::select_loop;
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|
LONGLONG start_time = gtod.msecs (); /* Record the current time for later use. */
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select_stuff sel;
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sel.return_on_signal = 0;
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/* Allocate some fd_set structures using the number of fds as a guide. */
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fd_set *r = allocfd_set (maxfds);
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fd_set *w = allocfd_set (maxfds);
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fd_set *e = allocfd_set (maxfds);
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while (res == select_stuff::select_loop)
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{
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/* Build the select record per fd linked list and set state as
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needed. */
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for (int i = 0; i < maxfds; i++)
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if (!sel.test_and_set (i, readfds, writefds, exceptfds))
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{
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select_printf ("aborting due to test_and_set error");
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return -1; /* Invalid fd, maybe? */
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}
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select_printf ("sel.always_ready %d", sel.always_ready);
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/* Degenerate case. No fds to wait for. Just wait for time to run out
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or signal to arrive. */
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if (sel.start.next == NULL)
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switch (cygwait (ms))
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|
{
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case WAIT_SIGNALED:
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select_printf ("signal received");
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/* select() is always interrupted by a signal so set EINTR,
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unconditionally, ignoring any SA_RESTART detection by
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call_signal_handler(). */
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_my_tls.call_signal_handler ();
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set_sig_errno (EINTR);
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res = select_stuff::select_signalled;
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break;
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case WAIT_CANCELED:
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sel.destroy ();
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pthread::static_cancel_self ();
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/*NOTREACHED*/
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default:
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res = select_stuff::select_set_zero; /* Set res to zero below. */
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break;
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}
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else if (sel.always_ready || ms == 0)
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res = 0; /* Catch any active fds via
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sel.poll() below */
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else
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res = sel.wait (r, w, e, ms); /* wait for an fd to become
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become active or time out */
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select_printf ("res %d", res);
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if (res >= 0)
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|
{
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|
copyfd_set (readfds, r, maxfds);
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copyfd_set (writefds, w, maxfds);
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copyfd_set (exceptfds, e, maxfds);
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if (res == select_stuff::select_set_zero)
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res = 0;
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else
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/* Set the bit mask from sel records */
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res = sel.poll (readfds, writefds, exceptfds) ?: select_stuff::select_loop;
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}
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/* Always clean up everything here. If we're looping then build it
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all up again. */
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sel.cleanup ();
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sel.destroy ();
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/* Recalculate the time remaining to wait if we are going to be looping. */
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if (res == select_stuff::select_loop && ms != INFINITE)
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{
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select_printf ("recalculating ms");
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LONGLONG now = gtod.msecs ();
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if (now > (start_time + ms))
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{
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select_printf ("timed out after verification");
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res = 0;
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}
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else
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{
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ms -= (now - start_time);
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start_time = now;
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select_printf ("ms now %u", ms);
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}
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}
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}
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if (res < -1)
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res = -1;
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return res;
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|
}
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|
|
|
extern "C" int
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pselect(int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
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|
const struct timespec *ts, const sigset_t *set)
|
|
{
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|
struct timeval tv;
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|
sigset_t oldset = _my_tls.sigmask;
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|
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__try
|
|
{
|
|
if (ts)
|
|
{
|
|
tv.tv_sec = ts->tv_sec;
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|
tv.tv_usec = ts->tv_nsec / 1000;
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|
}
|
|
if (set)
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|
set_signal_mask (_my_tls.sigmask, *set);
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|
int ret = cygwin_select (maxfds, readfds, writefds, exceptfds,
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ts ? &tv : NULL);
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|
if (set)
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|
set_signal_mask (_my_tls.sigmask, oldset);
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return ret;
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|
}
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|
__except (EFAULT) {}
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|
__endtry
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|
return -1;
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|
}
|
|
|
|
/* Call cleanup functions for all inspected fds. Gets rid of any
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|
executing threads. */
|
|
void
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|
select_stuff::cleanup ()
|
|
{
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|
select_record *s = &start;
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|
|
|
select_printf ("calling cleanup routines");
|
|
while ((s = s->next))
|
|
if (s->cleanup)
|
|
{
|
|
s->cleanup (s, this);
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|
s->cleanup = NULL;
|
|
}
|
|
}
|
|
|
|
/* Destroy all storage associated with select stuff. */
|
|
inline void
|
|
select_stuff::destroy ()
|
|
{
|
|
select_record *s;
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|
select_record *snext = start.next;
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|
|
|
select_printf ("deleting select records");
|
|
while ((s = snext))
|
|
{
|
|
snext = s->next;
|
|
delete s;
|
|
}
|
|
start.next = NULL;
|
|
}
|
|
|
|
select_stuff::~select_stuff ()
|
|
{
|
|
cleanup ();
|
|
destroy ();
|
|
}
|
|
|
|
#ifdef DEBUGGING
|
|
void
|
|
select_record::dump_select_record ()
|
|
{
|
|
select_printf ("fd %d, h %p, fh %p, thread_errno %d, windows_handle %p",
|
|
fd, h, fh, thread_errno, windows_handle);
|
|
select_printf ("read_ready %d, write_ready %d, except_ready %d",
|
|
read_ready, write_ready, except_ready);
|
|
select_printf ("read_selected %d, write_selected %d, except_selected %d, except_on_write %d",
|
|
read_selected, write_selected, except_selected, except_on_write);
|
|
|
|
select_printf ("startup %p, peek %p, verify %p cleanup %p, next %p",
|
|
startup, peek, verify, cleanup, next);
|
|
}
|
|
#endif /*DEBUGGING*/
|
|
|
|
/* Add a record to the select chain */
|
|
bool
|
|
select_stuff::test_and_set (int i, fd_set *readfds, fd_set *writefds,
|
|
fd_set *exceptfds)
|
|
{
|
|
if (!UNIX_FD_ISSET (i, readfds) && !UNIX_FD_ISSET (i, writefds)
|
|
&& ! UNIX_FD_ISSET (i, exceptfds))
|
|
return true;
|
|
|
|
select_record *s = new select_record;
|
|
if (!s)
|
|
return false;
|
|
|
|
s->next = start.next;
|
|
start.next = s;
|
|
|
|
if (UNIX_FD_ISSET (i, readfds) && !cygheap->fdtab.select_read (i, this))
|
|
goto err;
|
|
if (UNIX_FD_ISSET (i, writefds) && !cygheap->fdtab.select_write (i, this))
|
|
goto err;
|
|
if (UNIX_FD_ISSET (i, exceptfds) && !cygheap->fdtab.select_except (i, this))
|
|
goto err; /* error */
|
|
|
|
if (s->read_ready || s->write_ready || s->except_ready)
|
|
always_ready = true;
|
|
|
|
if (s->windows_handle)
|
|
windows_used = true;
|
|
|
|
#ifdef DEBUGGING
|
|
s->dump_select_record ();
|
|
#endif
|
|
return true;
|
|
|
|
err:
|
|
start.next = s->next;
|
|
delete s;
|
|
return false;
|
|
}
|
|
|
|
/* The heart of select. Waits for an fd to do something interesting. */
|
|
select_stuff::wait_states
|
|
select_stuff::wait (fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
|
|
DWORD ms)
|
|
{
|
|
HANDLE w4[MAXIMUM_WAIT_OBJECTS];
|
|
select_record *s = &start;
|
|
DWORD m = 0;
|
|
|
|
set_signal_arrived here (w4[m++]);
|
|
if ((w4[m] = pthread::get_cancel_event ()) != NULL)
|
|
m++;
|
|
|
|
DWORD startfds = m;
|
|
/* Loop through the select chain, starting up anything appropriate and
|
|
counting the number of active fds. */
|
|
while ((s = s->next))
|
|
{
|
|
if (m >= MAXIMUM_WAIT_OBJECTS)
|
|
{
|
|
set_sig_errno (EINVAL);
|
|
return select_error;
|
|
}
|
|
if (!s->startup (s, this))
|
|
{
|
|
s->set_select_errno ();
|
|
return select_error;
|
|
}
|
|
if (s->h != NULL)
|
|
{
|
|
for (DWORD i = startfds; i < m; i++)
|
|
if (w4[i] == s->h)
|
|
goto next_while;
|
|
w4[m++] = s->h;
|
|
}
|
|
next_while:;
|
|
}
|
|
|
|
debug_printf ("m %d, ms %u", m, ms);
|
|
|
|
DWORD wait_ret;
|
|
if (!windows_used)
|
|
wait_ret = WaitForMultipleObjects (m, w4, FALSE, ms);
|
|
else
|
|
/* Using MWMO_INPUTAVAILABLE is the officially supported solution for
|
|
the problem that the call to PeekMessage disarms the queue state
|
|
so that a subsequent MWFMO hangs, even if there are still messages
|
|
in the queue. */
|
|
wait_ret = MsgWaitForMultipleObjectsEx (m, w4, ms,
|
|
QS_ALLINPUT | QS_ALLPOSTMESSAGE,
|
|
MWMO_INPUTAVAILABLE);
|
|
select_printf ("wait_ret %d, m = %d. verifying", wait_ret, m);
|
|
|
|
wait_states res;
|
|
switch (wait_ret)
|
|
{
|
|
case WAIT_OBJECT_0:
|
|
select_printf ("signal received");
|
|
/* Need to get rid of everything when a signal occurs since we can't
|
|
be assured that a signal handler won't jump out of select entirely. */
|
|
cleanup ();
|
|
destroy ();
|
|
/* select() is always interrupted by a signal so set EINTR,
|
|
unconditionally, ignoring any SA_RESTART detection by
|
|
call_signal_handler(). */
|
|
_my_tls.call_signal_handler ();
|
|
set_sig_errno (EINTR);
|
|
res = select_signalled; /* Cause loop exit in cygwin_select */
|
|
break;
|
|
case WAIT_FAILED:
|
|
system_printf ("WaitForMultipleObjects failed, %E");
|
|
s = &start;
|
|
s->set_select_errno ();
|
|
res = select_error;
|
|
break;
|
|
case WAIT_TIMEOUT:
|
|
select_printf ("timed out");
|
|
res = select_set_zero;
|
|
break;
|
|
case WAIT_OBJECT_0 + 1:
|
|
if (startfds > 1)
|
|
{
|
|
cleanup ();
|
|
destroy ();
|
|
pthread::static_cancel_self ();
|
|
/*NOTREACHED*/
|
|
}
|
|
/* Fall through. This wasn't a cancel event. It was just a normal object
|
|
to wait for. */
|
|
default:
|
|
s = &start;
|
|
bool gotone = false;
|
|
/* Some types of objects (e.g., consoles) wake up on "inappropriate" events
|
|
like mouse movements. The verify function will detect these situations.
|
|
If it returns false, then this wakeup was a false alarm and we should go
|
|
back to waiting. */
|
|
while ((s = s->next))
|
|
if (s->saw_error ())
|
|
{
|
|
set_errno (s->saw_error ());
|
|
res = select_error; /* Somebody detected an error */
|
|
goto out;
|
|
}
|
|
else if ((((wait_ret >= m && s->windows_handle) || s->h == w4[wait_ret]))
|
|
&& s->verify (s, readfds, writefds, exceptfds))
|
|
gotone = true;
|
|
|
|
if (!gotone)
|
|
res = select_loop;
|
|
else
|
|
res = select_ok;
|
|
select_printf ("gotone %d", gotone);
|
|
break;
|
|
}
|
|
out:
|
|
select_printf ("returning %d", res);
|
|
return res;
|
|
}
|
|
|
|
static int
|
|
set_bits (select_record *me, fd_set *readfds, fd_set *writefds,
|
|
fd_set *exceptfds)
|
|
{
|
|
int ready = 0;
|
|
fhandler_socket *sock;
|
|
select_printf ("me %p, testing fd %d (%s)", me, me->fd, me->fh->get_name ());
|
|
if (me->read_selected && me->read_ready)
|
|
{
|
|
UNIX_FD_SET (me->fd, readfds);
|
|
ready++;
|
|
}
|
|
if (me->write_selected && me->write_ready)
|
|
{
|
|
UNIX_FD_SET (me->fd, writefds);
|
|
if (me->except_on_write && (sock = me->fh->is_socket ()))
|
|
{
|
|
/* Set readfds entry in case of a failed connect. */
|
|
if (!me->read_ready && me->read_selected
|
|
&& sock->connect_state () == connect_failed)
|
|
UNIX_FD_SET (me->fd, readfds);
|
|
}
|
|
ready++;
|
|
}
|
|
if (me->except_selected && me->except_ready)
|
|
{
|
|
UNIX_FD_SET (me->fd, exceptfds);
|
|
ready++;
|
|
}
|
|
select_printf ("ready %d", ready);
|
|
return ready;
|
|
}
|
|
|
|
/* Poll every fd in the select chain. Set appropriate fd in mask. */
|
|
int
|
|
select_stuff::poll (fd_set *readfds, fd_set *writefds, fd_set *exceptfds)
|
|
{
|
|
int n = 0;
|
|
select_record *s = &start;
|
|
while ((s = s->next))
|
|
n += (!s->peek || s->peek (s, true)) ?
|
|
set_bits (s, readfds, writefds, exceptfds) : 0;
|
|
return n;
|
|
}
|
|
|
|
static int
|
|
verify_true (select_record *, fd_set *, fd_set *, fd_set *)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
verify_ok (select_record *me, fd_set *readfds, fd_set *writefds,
|
|
fd_set *exceptfds)
|
|
{
|
|
return set_bits (me, readfds, writefds, exceptfds);
|
|
}
|
|
|
|
static int
|
|
no_startup (select_record *, select_stuff *)
|
|
{
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
no_verify (select_record *, fd_set *, fd_set *, fd_set *)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
pipe_data_available (int fd, fhandler_base *fh, HANDLE h, bool writing)
|
|
{
|
|
IO_STATUS_BLOCK iosb = {{0}, 0};
|
|
FILE_PIPE_LOCAL_INFORMATION fpli = {0};
|
|
|
|
bool res;
|
|
if (fh->has_ongoing_io ())
|
|
res = false;
|
|
else if (NtQueryInformationFile (h, &iosb, &fpli, sizeof (fpli),
|
|
FilePipeLocalInformation))
|
|
{
|
|
/* If NtQueryInformationFile fails, optimistically assume the
|
|
pipe is writable. This could happen if we somehow
|
|
inherit a pipe that doesn't permit FILE_READ_ATTRIBUTES
|
|
access on the write end. */
|
|
select_printf ("fd %d, %s, NtQueryInformationFile failed",
|
|
fd, fh->get_name ());
|
|
res = writing ? true : -1;
|
|
}
|
|
else if (!writing)
|
|
{
|
|
paranoid_printf ("fd %d, %s, read avail %u", fd, fh->get_name (),
|
|
fpli.ReadDataAvailable);
|
|
res = !!fpli.ReadDataAvailable;
|
|
}
|
|
else if ((res = (fpli.WriteQuotaAvailable = (fpli.OutboundQuota -
|
|
fpli.ReadDataAvailable))))
|
|
/* If there is anything available in the pipe buffer then signal
|
|
that. This means that a pipe could still block since you could
|
|
be trying to write more to the pipe than is available in the
|
|
buffer but that is the hazard of select(). */
|
|
paranoid_printf ("fd %d, %s, write: size %u, avail %u", fd,
|
|
fh->get_name (), fpli.OutboundQuota,
|
|
fpli.WriteQuotaAvailable);
|
|
else if ((res = (fpli.OutboundQuota < PIPE_BUF &&
|
|
fpli.WriteQuotaAvailable == fpli.OutboundQuota)))
|
|
/* If we somehow inherit a tiny pipe (size < PIPE_BUF), then consider
|
|
the pipe writable only if it is completely empty, to minimize the
|
|
probability that a subsequent write will block. */
|
|
select_printf ("fd, %s, write tiny pipe: size %u, avail %u",
|
|
fd, fh->get_name (), fpli.OutboundQuota,
|
|
fpli.WriteQuotaAvailable);
|
|
return res ?: -!!(fpli.NamedPipeState & FILE_PIPE_CLOSING_STATE);
|
|
}
|
|
|
|
static int
|
|
peek_pipe (select_record *s, bool from_select)
|
|
{
|
|
HANDLE h;
|
|
set_handle_or_return_if_not_open (h, s);
|
|
|
|
int gotone = 0;
|
|
fhandler_base *fh = (fhandler_base *) s->fh;
|
|
|
|
DWORD dev = fh->get_device ();
|
|
if (s->read_selected && dev != FH_PIPEW)
|
|
{
|
|
if (s->read_ready)
|
|
{
|
|
select_printf ("%s, already ready for read", fh->get_name ());
|
|
gotone = 1;
|
|
goto out;
|
|
}
|
|
|
|
switch (fh->get_major ())
|
|
{
|
|
case DEV_PTYM_MAJOR:
|
|
{
|
|
fhandler_pty_master *fhm = (fhandler_pty_master *) fh;
|
|
fhm->flush_to_slave ();
|
|
if (fhm->need_nl)
|
|
{
|
|
gotone = s->read_ready = true;
|
|
goto out;
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
if (fh->get_readahead_valid ())
|
|
{
|
|
select_printf ("readahead");
|
|
gotone = s->read_ready = true;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (fh->bg_check (SIGTTIN) <= bg_eof)
|
|
{
|
|
gotone = s->read_ready = true;
|
|
goto out;
|
|
}
|
|
int n = pipe_data_available (s->fd, fh, h, false);
|
|
|
|
if (n < 0)
|
|
{
|
|
select_printf ("read: %s, n %d", fh->get_name (), n);
|
|
if (s->except_selected)
|
|
gotone += s->except_ready = true;
|
|
if (s->read_selected)
|
|
gotone += s->read_ready = true;
|
|
}
|
|
else if (n > 0)
|
|
{
|
|
select_printf ("read: %s, ready for read: avail %d", fh->get_name (), n);
|
|
gotone += s->read_ready = true;
|
|
}
|
|
if (!gotone && s->fh->hit_eof ())
|
|
{
|
|
select_printf ("read: %s, saw EOF", fh->get_name ());
|
|
if (s->except_selected)
|
|
gotone += s->except_ready = true;
|
|
if (s->read_selected)
|
|
gotone += s->read_ready = true;
|
|
}
|
|
}
|
|
|
|
out:
|
|
if (s->write_selected && dev != FH_PIPER)
|
|
{
|
|
gotone += s->write_ready = pipe_data_available (s->fd, fh, h, true);
|
|
select_printf ("write: %s, gotone %d", fh->get_name (), gotone);
|
|
}
|
|
return gotone;
|
|
}
|
|
|
|
static int start_thread_pipe (select_record *me, select_stuff *stuff);
|
|
|
|
static DWORD WINAPI
|
|
thread_pipe (void *arg)
|
|
{
|
|
select_pipe_info *pi = (select_pipe_info *) arg;
|
|
DWORD sleep_time = 0;
|
|
bool looping = true;
|
|
|
|
while (looping)
|
|
{
|
|
for (select_record *s = pi->start; (s = s->next); )
|
|
if (s->startup == start_thread_pipe)
|
|
{
|
|
if (peek_pipe (s, true))
|
|
looping = false;
|
|
if (pi->stop_thread)
|
|
{
|
|
select_printf ("stopping");
|
|
looping = false;
|
|
break;
|
|
}
|
|
}
|
|
if (!looping)
|
|
break;
|
|
Sleep (sleep_time >> 3);
|
|
if (sleep_time < 80)
|
|
++sleep_time;
|
|
if (pi->stop_thread)
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
start_thread_pipe (select_record *me, select_stuff *stuff)
|
|
{
|
|
select_pipe_info *pi = stuff->device_specific_pipe;
|
|
if (pi->start)
|
|
me->h = *((select_pipe_info *) stuff->device_specific_pipe)->thread;
|
|
else
|
|
{
|
|
pi->start = &stuff->start;
|
|
pi->stop_thread = false;
|
|
pi->thread = new cygthread (thread_pipe, pi, "pipesel");
|
|
me->h = *pi->thread;
|
|
if (!me->h)
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
pipe_cleanup (select_record *, select_stuff *stuff)
|
|
{
|
|
select_pipe_info *pi = (select_pipe_info *) stuff->device_specific_pipe;
|
|
if (!pi)
|
|
return;
|
|
if (pi->thread)
|
|
{
|
|
pi->stop_thread = true;
|
|
pi->thread->detach ();
|
|
}
|
|
delete pi;
|
|
stuff->device_specific_pipe = NULL;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pipe::select_read (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pipe::select_write (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->write_selected = true;
|
|
s->write_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pipe::select_except (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_fifo::select_read (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_fifo::select_write (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->write_selected = true;
|
|
s->write_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_fifo::select_except (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
static int
|
|
peek_console (select_record *me, bool)
|
|
{
|
|
extern const char * get_nonascii_key (INPUT_RECORD& input_rec, char *);
|
|
fhandler_console *fh = (fhandler_console *) me->fh;
|
|
|
|
if (!me->read_selected)
|
|
return me->write_ready;
|
|
|
|
if (fh->get_readahead_valid ())
|
|
{
|
|
select_printf ("readahead");
|
|
return me->read_ready = true;
|
|
}
|
|
|
|
if (me->read_ready)
|
|
{
|
|
select_printf ("already ready");
|
|
return 1;
|
|
}
|
|
|
|
INPUT_RECORD irec;
|
|
DWORD events_read;
|
|
HANDLE h;
|
|
char tmpbuf[17];
|
|
set_handle_or_return_if_not_open (h, me);
|
|
|
|
for (;;)
|
|
if (fh->bg_check (SIGTTIN) <= bg_eof)
|
|
return me->read_ready = true;
|
|
else if (!PeekConsoleInput (h, &irec, 1, &events_read) || !events_read)
|
|
break;
|
|
else
|
|
{
|
|
fh->send_winch_maybe ();
|
|
if (irec.EventType == KEY_EVENT)
|
|
{
|
|
if (irec.Event.KeyEvent.bKeyDown
|
|
&& (irec.Event.KeyEvent.uChar.AsciiChar
|
|
|| get_nonascii_key (irec, tmpbuf)))
|
|
return me->read_ready = true;
|
|
}
|
|
else
|
|
{
|
|
if (irec.EventType == MOUSE_EVENT
|
|
&& fh->mouse_aware (irec.Event.MouseEvent))
|
|
return me->read_ready = true;
|
|
if (irec.EventType == FOCUS_EVENT && fh->focus_aware ())
|
|
return me->read_ready = true;
|
|
}
|
|
|
|
/* Read and discard the event */
|
|
ReadConsoleInput (h, &irec, 1, &events_read);
|
|
}
|
|
|
|
return me->write_ready;
|
|
}
|
|
|
|
static int
|
|
verify_console (select_record *me, fd_set *rfds, fd_set *wfds,
|
|
fd_set *efds)
|
|
{
|
|
return peek_console (me, true);
|
|
}
|
|
|
|
|
|
select_record *
|
|
fhandler_console::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_console;
|
|
set_cursor_maybe ();
|
|
}
|
|
|
|
s->peek = peek_console;
|
|
s->h = get_handle ();
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_console::select_write (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
set_cursor_maybe ();
|
|
}
|
|
|
|
s->peek = peek_console;
|
|
s->write_selected = true;
|
|
s->write_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_console::select_except (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
set_cursor_maybe ();
|
|
}
|
|
|
|
s->peek = peek_console;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pty_common::select_read (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pty_common::select_write (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->write_selected = true;
|
|
s->write_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pty_common::select_except (select_stuff *ss)
|
|
{
|
|
if (!ss->device_specific_pipe
|
|
&& (ss->device_specific_pipe = new select_pipe_info) == NULL)
|
|
return NULL;
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_pipe;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_ok;
|
|
s->cleanup = pipe_cleanup;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
static int
|
|
verify_tty_slave (select_record *me, fd_set *readfds, fd_set *writefds,
|
|
fd_set *exceptfds)
|
|
{
|
|
if (IsEventSignalled (me->h))
|
|
me->read_ready = true;
|
|
return set_bits (me, readfds, writefds, exceptfds);
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pty_slave::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
s->h = input_available_event;
|
|
s->startup = no_startup;
|
|
s->peek = peek_pipe;
|
|
s->verify = verify_tty_slave;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
s->cleanup = NULL;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_dev_null::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
}
|
|
s->h = get_handle ();
|
|
s->read_selected = true;
|
|
s->read_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_dev_null::select_write (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
}
|
|
s->h = get_handle ();
|
|
s->write_selected = true;
|
|
s->write_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_dev_null::select_except (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = no_verify;
|
|
}
|
|
s->h = get_handle ();
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
static int start_thread_serial (select_record *me, select_stuff *stuff);
|
|
|
|
static int
|
|
peek_serial (select_record *s, bool)
|
|
{
|
|
COMSTAT st;
|
|
|
|
fhandler_serial *fh = (fhandler_serial *) s->fh;
|
|
|
|
if (fh->get_readahead_valid () || fh->overlapped_armed < 0)
|
|
return s->read_ready = true;
|
|
|
|
select_printf ("fh->overlapped_armed %d", fh->overlapped_armed);
|
|
|
|
HANDLE h;
|
|
set_handle_or_return_if_not_open (h, s);
|
|
int ready = 0;
|
|
|
|
if ((s->read_selected && s->read_ready) || (s->write_selected && s->write_ready))
|
|
{
|
|
select_printf ("already ready");
|
|
ready = 1;
|
|
goto out;
|
|
}
|
|
|
|
/* This is apparently necessary for the com0com driver.
|
|
See: http://cygwin.com/ml/cygwin/2009-01/msg00667.html */
|
|
SetCommMask (h, 0);
|
|
|
|
SetCommMask (h, EV_RXCHAR);
|
|
|
|
if (!fh->overlapped_armed)
|
|
{
|
|
COMSTAT st;
|
|
|
|
ResetEvent (fh->io_status.hEvent);
|
|
|
|
if (!ClearCommError (h, &fh->ev, &st))
|
|
{
|
|
debug_printf ("ClearCommError");
|
|
goto err;
|
|
}
|
|
else if (st.cbInQue)
|
|
return s->read_ready = true;
|
|
else if (WaitCommEvent (h, &fh->ev, &fh->io_status))
|
|
return s->read_ready = true;
|
|
else if (GetLastError () == ERROR_IO_PENDING)
|
|
fh->overlapped_armed = 1;
|
|
else
|
|
{
|
|
debug_printf ("WaitCommEvent");
|
|
goto err;
|
|
}
|
|
}
|
|
|
|
switch (WaitForSingleObject (fh->io_status.hEvent, 10L))
|
|
{
|
|
case WAIT_OBJECT_0:
|
|
if (!ClearCommError (h, &fh->ev, &st))
|
|
{
|
|
debug_printf ("ClearCommError");
|
|
goto err;
|
|
}
|
|
else if (!st.cbInQue)
|
|
Sleep (10L);
|
|
else
|
|
{
|
|
return s->read_ready = true;
|
|
select_printf ("got something");
|
|
}
|
|
break;
|
|
case WAIT_TIMEOUT:
|
|
break;
|
|
default:
|
|
debug_printf ("WaitForMultipleObjects");
|
|
goto err;
|
|
}
|
|
|
|
out:
|
|
return ready;
|
|
|
|
err:
|
|
if (GetLastError () == ERROR_OPERATION_ABORTED)
|
|
{
|
|
select_printf ("operation aborted");
|
|
return ready;
|
|
}
|
|
|
|
s->set_select_errno ();
|
|
select_printf ("error %E");
|
|
return -1;
|
|
}
|
|
|
|
static DWORD WINAPI
|
|
thread_serial (void *arg)
|
|
{
|
|
select_serial_info *si = (select_serial_info *) arg;
|
|
bool looping = true;
|
|
|
|
while (looping)
|
|
for (select_record *s = si->start; (s = s->next); )
|
|
if (s->startup != start_thread_serial)
|
|
continue;
|
|
else
|
|
{
|
|
if (peek_serial (s, true))
|
|
looping = false;
|
|
if (si->stop_thread)
|
|
{
|
|
select_printf ("stopping");
|
|
looping = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
select_printf ("exiting");
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
start_thread_serial (select_record *me, select_stuff *stuff)
|
|
{
|
|
if (stuff->device_specific_serial)
|
|
me->h = *((select_serial_info *) stuff->device_specific_serial)->thread;
|
|
else
|
|
{
|
|
select_serial_info *si = new select_serial_info;
|
|
si->start = &stuff->start;
|
|
si->stop_thread = false;
|
|
si->thread = new cygthread (thread_serial, si, "sersel");
|
|
me->h = *si->thread;
|
|
stuff->device_specific_serial = si;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
serial_cleanup (select_record *, select_stuff *stuff)
|
|
{
|
|
select_serial_info *si = (select_serial_info *) stuff->device_specific_serial;
|
|
if (!si)
|
|
return;
|
|
if (si->thread)
|
|
{
|
|
si->stop_thread = true;
|
|
si->thread->detach ();
|
|
}
|
|
delete si;
|
|
stuff->device_specific_serial = NULL;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_serial::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = start_thread_serial;
|
|
s->verify = verify_ok;
|
|
s->cleanup = serial_cleanup;
|
|
}
|
|
s->peek = peek_serial;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_serial::select_write (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->peek = peek_serial;
|
|
s->h = get_handle ();
|
|
s->write_selected = true;
|
|
s->write_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_serial::select_except (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->h = NULL;
|
|
s->peek = peek_serial;
|
|
s->except_selected = false; // Can't do this
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_base::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->h = get_handle ();
|
|
s->read_selected = true;
|
|
s->read_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_base::select_write (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->h = get_handle ();
|
|
s->write_selected = true;
|
|
s->write_ready = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_base::select_except (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->h = NULL;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
return s;
|
|
}
|
|
|
|
static int
|
|
peek_socket (select_record *me, bool)
|
|
{
|
|
fhandler_socket *fh = (fhandler_socket *) me->fh;
|
|
long events;
|
|
/* Don't play with the settings again, unless having taken a deep look into
|
|
Richard W. Stevens Network Programming book. Thank you. */
|
|
long evt_mask = (me->read_selected ? (FD_READ | FD_ACCEPT | FD_CLOSE) : 0)
|
|
| (me->write_selected ? (FD_WRITE | FD_CONNECT | FD_CLOSE) : 0)
|
|
| (me->except_selected ? FD_OOB : 0);
|
|
int ret = fh->evaluate_events (evt_mask, events, false);
|
|
if (me->read_selected)
|
|
me->read_ready |= ret || !!(events & (FD_READ | FD_ACCEPT | FD_CLOSE));
|
|
if (me->write_selected)
|
|
me->write_ready |= ret || !!(events & (FD_WRITE | FD_CONNECT | FD_CLOSE));
|
|
if (me->except_selected)
|
|
me->except_ready |= !!(events & FD_OOB);
|
|
|
|
select_printf ("read_ready: %d, write_ready: %d, except_ready: %d",
|
|
me->read_ready, me->write_ready, me->except_ready);
|
|
return me->read_ready || me->write_ready || me->except_ready;
|
|
}
|
|
|
|
static int start_thread_socket (select_record *, select_stuff *);
|
|
|
|
static DWORD WINAPI
|
|
thread_socket (void *arg)
|
|
{
|
|
select_socket_info *si = (select_socket_info *) arg;
|
|
DWORD timeout = (si->num_w4 <= MAXIMUM_WAIT_OBJECTS)
|
|
? INFINITE
|
|
: (64 / (roundup2 (si->num_w4, MAXIMUM_WAIT_OBJECTS)
|
|
/ MAXIMUM_WAIT_OBJECTS));
|
|
bool event = false;
|
|
|
|
select_printf ("stuff_start %p, timeout %u", si->start, timeout);
|
|
while (!event)
|
|
{
|
|
for (select_record *s = si->start; (s = s->next); )
|
|
if (s->startup == start_thread_socket)
|
|
if (peek_socket (s, false))
|
|
event = true;
|
|
if (!event)
|
|
for (int i = 0; i < si->num_w4; i += MAXIMUM_WAIT_OBJECTS)
|
|
switch (WaitForMultipleObjects (MIN (si->num_w4 - i,
|
|
MAXIMUM_WAIT_OBJECTS),
|
|
si->w4 + i, FALSE, timeout))
|
|
{
|
|
case WAIT_FAILED:
|
|
goto out;
|
|
case WAIT_TIMEOUT:
|
|
continue;
|
|
case WAIT_OBJECT_0:
|
|
if (!i) /* Socket event set. */
|
|
goto out;
|
|
/*FALLTHRU*/
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
out:
|
|
select_printf ("leaving thread_socket");
|
|
return 0;
|
|
}
|
|
|
|
static inline bool init_tls_select_info () __attribute__ ((always_inline));
|
|
static inline bool
|
|
init_tls_select_info ()
|
|
{
|
|
if (!_my_tls.locals.select.sockevt)
|
|
{
|
|
_my_tls.locals.select.sockevt = CreateEvent (&sec_none_nih, TRUE, FALSE,
|
|
NULL);
|
|
if (!_my_tls.locals.select.sockevt)
|
|
return false;
|
|
}
|
|
if (!_my_tls.locals.select.ser_num)
|
|
{
|
|
_my_tls.locals.select.ser_num
|
|
= (LONG *) malloc (MAXIMUM_WAIT_OBJECTS * sizeof (LONG));
|
|
if (!_my_tls.locals.select.ser_num)
|
|
return false;
|
|
_my_tls.locals.select.w4
|
|
= (HANDLE *) malloc (MAXIMUM_WAIT_OBJECTS * sizeof (HANDLE));
|
|
if (!_my_tls.locals.select.w4)
|
|
{
|
|
free (_my_tls.locals.select.ser_num);
|
|
_my_tls.locals.select.ser_num = NULL;
|
|
return false;
|
|
}
|
|
_my_tls.locals.select.max_w4 = MAXIMUM_WAIT_OBJECTS;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static int
|
|
start_thread_socket (select_record *me, select_stuff *stuff)
|
|
{
|
|
select_socket_info *si;
|
|
|
|
if ((si = (select_socket_info *) stuff->device_specific_socket))
|
|
{
|
|
me->h = *si->thread;
|
|
return 1;
|
|
}
|
|
|
|
si = new select_socket_info;
|
|
|
|
if (!init_tls_select_info ())
|
|
{
|
|
delete si;
|
|
return 0;
|
|
}
|
|
|
|
si->ser_num = _my_tls.locals.select.ser_num;
|
|
si->w4 = _my_tls.locals.select.w4;
|
|
|
|
si->w4[0] = _my_tls.locals.select.sockevt;
|
|
si->num_w4 = 1;
|
|
|
|
select_record *s = &stuff->start;
|
|
while ((s = s->next))
|
|
if (s->startup == start_thread_socket)
|
|
{
|
|
/* No event/socket should show up multiple times. Every socket
|
|
is uniquely identified by its serial number in the global
|
|
wsock_events record. */
|
|
const LONG ser_num = ((fhandler_socket *) s->fh)->serial_number ();
|
|
for (int i = 1; i < si->num_w4; ++i)
|
|
if (si->ser_num[i] == ser_num)
|
|
goto continue_outer_loop;
|
|
if (si->num_w4 >= _my_tls.locals.select.max_w4)
|
|
{
|
|
LONG *nser = (LONG *) realloc (si->ser_num,
|
|
(_my_tls.locals.select.max_w4
|
|
+ MAXIMUM_WAIT_OBJECTS)
|
|
* sizeof (LONG));
|
|
if (!nser)
|
|
{
|
|
delete si;
|
|
return 0;
|
|
}
|
|
_my_tls.locals.select.ser_num = si->ser_num = nser;
|
|
HANDLE *nw4 = (HANDLE *) realloc (si->w4,
|
|
(_my_tls.locals.select.max_w4
|
|
+ MAXIMUM_WAIT_OBJECTS)
|
|
* sizeof (HANDLE));
|
|
if (!nw4)
|
|
{
|
|
delete si;
|
|
return 0;
|
|
}
|
|
_my_tls.locals.select.w4 = si->w4 = nw4;
|
|
_my_tls.locals.select.max_w4 += MAXIMUM_WAIT_OBJECTS;
|
|
}
|
|
si->ser_num[si->num_w4] = ser_num;
|
|
si->w4[si->num_w4++] = ((fhandler_socket *) s->fh)->wsock_event ();
|
|
continue_outer_loop:
|
|
;
|
|
}
|
|
stuff->device_specific_socket = si;
|
|
si->start = &stuff->start;
|
|
select_printf ("stuff_start %p", &stuff->start);
|
|
si->thread = new cygthread (thread_socket, si, "socksel");
|
|
me->h = *si->thread;
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
socket_cleanup (select_record *, select_stuff *stuff)
|
|
{
|
|
select_socket_info *si = (select_socket_info *) stuff->device_specific_socket;
|
|
select_printf ("si %p si->thread %p", si, si ? si->thread : NULL);
|
|
if (!si)
|
|
return;
|
|
if (si->thread)
|
|
{
|
|
SetEvent (si->w4[0]);
|
|
/* Wait for thread to go away */
|
|
si->thread->detach ();
|
|
ResetEvent (si->w4[0]);
|
|
}
|
|
delete si;
|
|
stuff->device_specific_socket = NULL;
|
|
select_printf ("returning");
|
|
}
|
|
|
|
select_record *
|
|
fhandler_socket::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = start_thread_socket;
|
|
s->verify = verify_true;
|
|
s->cleanup = socket_cleanup;
|
|
}
|
|
s->peek = peek_socket;
|
|
s->read_ready = saw_shutdown_read ();
|
|
s->read_selected = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_socket::select_write (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = start_thread_socket;
|
|
s->verify = verify_true;
|
|
s->cleanup = socket_cleanup;
|
|
}
|
|
s->peek = peek_socket;
|
|
s->write_ready = saw_shutdown_write () || connect_state () == unconnected;
|
|
s->write_selected = true;
|
|
if (connect_state () != unconnected)
|
|
{
|
|
s->except_ready = saw_shutdown_write () || saw_shutdown_read ();
|
|
s->except_on_write = true;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_socket::select_except (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = start_thread_socket;
|
|
s->verify = verify_true;
|
|
s->cleanup = socket_cleanup;
|
|
}
|
|
s->peek = peek_socket;
|
|
/* FIXME: Is this right? Should these be used as criteria for except? */
|
|
s->except_ready = saw_shutdown_write () || saw_shutdown_read ();
|
|
s->except_selected = true;
|
|
return s;
|
|
}
|
|
|
|
static int
|
|
peek_windows (select_record *me, bool)
|
|
{
|
|
MSG m;
|
|
HANDLE h;
|
|
set_handle_or_return_if_not_open (h, me);
|
|
/* We need the hWnd value, not the io_handle. */
|
|
h = ((fhandler_windows *) me->fh)->get_hwnd ();
|
|
|
|
if (me->read_selected && me->read_ready)
|
|
return 1;
|
|
|
|
if (PeekMessageW (&m, (HWND) h, 0, 0, PM_NOREMOVE))
|
|
{
|
|
me->read_ready = true;
|
|
select_printf ("window %d(%p) ready", me->fd, h);
|
|
return 1;
|
|
}
|
|
|
|
select_printf ("window %d(%p) not ready", me->fd, h);
|
|
return me->write_ready;
|
|
}
|
|
|
|
static int
|
|
verify_windows (select_record *me, fd_set *rfds, fd_set *wfds,
|
|
fd_set *efds)
|
|
{
|
|
return peek_windows (me, true);
|
|
}
|
|
|
|
select_record *
|
|
fhandler_windows::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
}
|
|
s->verify = verify_windows;
|
|
s->peek = peek_windows;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
s->windows_handle = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_windows::select_write (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->peek = peek_windows;
|
|
s->write_selected = true;
|
|
s->write_ready = true;
|
|
s->windows_handle = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_windows::select_except (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
if (!s->startup)
|
|
{
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->peek = peek_windows;
|
|
s->except_selected = true;
|
|
s->except_ready = false;
|
|
s->windows_handle = true;
|
|
return s;
|
|
}
|
|
|
|
static int
|
|
peek_mailslot (select_record *me, bool)
|
|
{
|
|
HANDLE h;
|
|
set_handle_or_return_if_not_open (h, me);
|
|
|
|
if (me->read_selected && me->read_ready)
|
|
return 1;
|
|
DWORD msgcnt = 0;
|
|
if (!GetMailslotInfo (h, NULL, NULL, &msgcnt, NULL))
|
|
{
|
|
select_printf ("mailslot %d(%p) error %E", me->fd, h);
|
|
return 1;
|
|
}
|
|
if (msgcnt > 0)
|
|
{
|
|
me->read_ready = true;
|
|
select_printf ("mailslot %d(%p) ready", me->fd, h);
|
|
return 1;
|
|
}
|
|
select_printf ("mailslot %d(%p) not ready", me->fd, h);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
verify_mailslot (select_record *me, fd_set *rfds, fd_set *wfds,
|
|
fd_set *efds)
|
|
{
|
|
return peek_mailslot (me, true);
|
|
}
|
|
|
|
static int start_thread_mailslot (select_record *me, select_stuff *stuff);
|
|
|
|
static DWORD WINAPI
|
|
thread_mailslot (void *arg)
|
|
{
|
|
select_mailslot_info *mi = (select_mailslot_info *) arg;
|
|
bool gotone = false;
|
|
DWORD sleep_time = 0;
|
|
|
|
for (;;)
|
|
{
|
|
select_record *s = mi->start;
|
|
while ((s = s->next))
|
|
if (s->startup == start_thread_mailslot)
|
|
{
|
|
if (peek_mailslot (s, true))
|
|
gotone = true;
|
|
if (mi->stop_thread)
|
|
{
|
|
select_printf ("stopping");
|
|
goto out;
|
|
}
|
|
}
|
|
/* Paranoid check */
|
|
if (mi->stop_thread)
|
|
{
|
|
select_printf ("stopping from outer loop");
|
|
break;
|
|
}
|
|
if (gotone)
|
|
break;
|
|
Sleep (sleep_time >> 3);
|
|
if (sleep_time < 80)
|
|
++sleep_time;
|
|
}
|
|
out:
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
start_thread_mailslot (select_record *me, select_stuff *stuff)
|
|
{
|
|
if (stuff->device_specific_mailslot)
|
|
{
|
|
me->h = *((select_mailslot_info *) stuff->device_specific_mailslot)->thread;
|
|
return 1;
|
|
}
|
|
select_mailslot_info *mi = new select_mailslot_info;
|
|
mi->start = &stuff->start;
|
|
mi->stop_thread = false;
|
|
mi->thread = new cygthread (thread_mailslot, mi, "mailsel");
|
|
me->h = *mi->thread;
|
|
if (!me->h)
|
|
return 0;
|
|
stuff->device_specific_mailslot = mi;
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
mailslot_cleanup (select_record *, select_stuff *stuff)
|
|
{
|
|
select_mailslot_info *mi = (select_mailslot_info *) stuff->device_specific_mailslot;
|
|
if (!mi)
|
|
return;
|
|
if (mi->thread)
|
|
{
|
|
mi->stop_thread = true;
|
|
mi->thread->detach ();
|
|
}
|
|
delete mi;
|
|
stuff->device_specific_mailslot = NULL;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_mailslot::select_read (select_stuff *ss)
|
|
{
|
|
select_record *s = ss->start.next;
|
|
s->startup = start_thread_mailslot;
|
|
s->peek = peek_mailslot;
|
|
s->verify = verify_mailslot;
|
|
s->cleanup = mailslot_cleanup;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
return s;
|
|
}
|