70300fdb1c
* dcrt0.cc (signal_shift_subtract): Eliminate ancient backwards compatibility. (check_sanity_and_sync): Ditto. * winsup.h (SIGTOMASK): Ditto. Just use constant in signal calculation. * include/cygwin/version: Remove backwards signal mask compatibility define. * path.cc (symlink_info::check_sysfile): Cosmetic change. * registry.cc (get_registry_hive_path): Remove unneeded variable. * exceptions.cc (handle_sigsuspend): Eliminate thread signal mask and use either main sigmask or current thread sigmask. (set_process_mask): Ditto. (sighold): Ditto. (sigrelse): Ditto. (sigset): Ditto. (set_process_mask_delta): Ditto. (_cygtls::call_signal_handler): Ditto. * fhandler_process.cc (format_process_status): Ditto. * fhandler_termios.cc (fhandler_termios::bg_check): Ditto. * pinfo.h (class pinfo): Ditto. * select.cc (pselect): Ditto. * signal.cc (sigprocmask): Ditto. (abort): Ditto. (sigpause): Ditto. (sigsend): Ditto. (wait_sig): Ditto. * thread.h (pthread::parent_tls): New member. * thread.cc (pthread::pthread): Record parent_tls here. (pthread::thread_init_wrapper): Initialize sigmask from parent thread.
1614 lines
36 KiB
C++
1614 lines
36 KiB
C++
/* select.cc
|
|
|
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
|
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2005, 2006, 2007 Red Hat, Inc.
|
|
|
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This file is part of Cygwin.
|
|
|
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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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|
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/* The following line means that the BSD socket definitions for
|
|
fd_set, FD_ISSET etc. are used in this file. */
|
|
|
|
#define __INSIDE_CYGWIN_NET__
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|
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#include "winsup.h"
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#include <sys/socket.h>
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#include <stdlib.h>
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#include <sys/time.h>
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|
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#include <wingdi.h>
|
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#include <winuser.h>
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#include <netdb.h>
|
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#include <unistd.h>
|
|
#include <limits.h>
|
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#define USE_SYS_TYPES_FD_SET
|
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#include <winsock.h>
|
|
#include "cygerrno.h"
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|
#include "security.h"
|
|
#include "path.h"
|
|
#include "fhandler.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 "tty.h"
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#include "ntdll.h"
|
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#include "cygtls.h"
|
|
#include <asm/byteorder.h>
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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
|
|
* been included. We create special UNIX_xxxx versions here.
|
|
*/
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|
|
|
#ifndef NBBY
|
|
#define NBBY 8 /* number of bits in a byte */
|
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#endif /* NBBY */
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|
|
|
/*
|
|
* Select uses bit masks of file descriptors in longs.
|
|
* These macros manipulate such bit fields (the filesystem macros use chars).
|
|
* FD_SETSIZE may be defined by the user, but the default here
|
|
* should be >= NOFILE (param.h).
|
|
*/
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|
|
|
typedef long fd_mask;
|
|
#define UNIX_NFDBITS (sizeof (fd_mask) * NBBY) /* bits per mask */
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|
#ifndef unix_howmany
|
|
#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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|
|
#define NULL_fd_set ((fd_set *) NULL)
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#define sizeof_fd_set(n) \
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((unsigned) (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)))
|
|
#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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bzero ((caddr_t)(p), sizeof_fd_set ((n)))
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|
|
#define allocfd_set(n) ((fd_set *) memset (alloca (sizeof_fd_set (n)), 0, sizeof_fd_set (n)))
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#define copyfd_set(to, from, n) memcpy (to, from, sizeof_fd_set (n));
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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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|
|
|
/* The main select code.
|
|
*/
|
|
extern "C" int
|
|
cygwin_select (int maxfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
|
|
struct timeval *to)
|
|
{
|
|
select_stuff sel;
|
|
fd_set *dummy_readfds = allocfd_set (maxfds);
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|
fd_set *dummy_writefds = allocfd_set (maxfds);
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fd_set *dummy_exceptfds = allocfd_set (maxfds);
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|
|
select_printf ("%d, %p, %p, %p, %p", maxfds, readfds, writefds, exceptfds, to);
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|
|
if (!readfds)
|
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readfds = dummy_readfds;
|
|
if (!writefds)
|
|
writefds = dummy_writefds;
|
|
if (!exceptfds)
|
|
exceptfds = dummy_exceptfds;
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|
|
|
for (int i = 0; i < maxfds; i++)
|
|
if (!sel.test_and_set (i, readfds, writefds, exceptfds))
|
|
{
|
|
select_printf ("aborting due to test_and_set error");
|
|
return -1; /* Invalid fd, maybe? */
|
|
}
|
|
|
|
/* Convert to milliseconds or INFINITE if to == NULL */
|
|
DWORD ms = to ? (to->tv_sec * 1000) + (to->tv_usec / 1000) : INFINITE;
|
|
if (ms == 0 && to->tv_usec)
|
|
ms = 1; /* At least 1 ms granularity */
|
|
|
|
if (to)
|
|
select_printf ("to->tv_sec %d, to->tv_usec %d, ms %d", to->tv_sec, to->tv_usec, ms);
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|
else
|
|
select_printf ("to NULL, ms %x", ms);
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|
|
|
select_printf ("sel.always_ready %d", sel.always_ready);
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|
|
|
int timeout = 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);
|
|
|
|
/* Degenerate case. No fds to wait for. Just wait. */
|
|
if (sel.start.next == NULL)
|
|
{
|
|
if (WaitForSingleObject (signal_arrived, ms) == WAIT_OBJECT_0)
|
|
{
|
|
select_printf ("signal received");
|
|
set_sig_errno (EINTR);
|
|
return -1;
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|
}
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|
timeout = 1;
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|
}
|
|
else if (sel.always_ready || ms == 0)
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|
/* Don't bother waiting. */;
|
|
else if ((timeout = sel.wait (r, w, e, ms) < 0))
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|
return -1; /* some kind of error */
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|
|
sel.cleanup ();
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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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|
return timeout ? 0 : sel.poll (readfds, writefds, exceptfds);
|
|
}
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|
|
extern "C" int
|
|
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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|
myfault efault;
|
|
if (efault.faulted (EFAULT))
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return -1;
|
|
if (ts)
|
|
{
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|
tv.tv_sec = ts->tv_sec;
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|
tv.tv_usec = ts->tv_nsec / 1000;
|
|
}
|
|
if (set)
|
|
set_signal_mask (*set, _my_tls.sigmask);
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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 (oldset, _my_tls.sigmask);
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|
return ret;
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|
}
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|
/* Call cleanup functions for all inspected fds. Gets rid of any
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executing threads. */
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|
void
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|
select_stuff::cleanup ()
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|
{
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|
select_record *s = &start;
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|
select_printf ("calling cleanup routines");
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|
while ((s = s->next))
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|
if (s->cleanup)
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|
{
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|
s->cleanup (s, this);
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|
s->cleanup = NULL;
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|
}
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|
}
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|
/* Destroy all storage associated with select stuff. */
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|
select_stuff::~select_stuff ()
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|
{
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|
cleanup ();
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select_record *s = &start;
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select_record *snext = start.next;
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select_printf ("deleting select records");
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while ((s = snext))
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|
{
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|
snext = s->next;
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|
delete s;
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|
}
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}
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|
|
/* Add a record to the select chain */
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|
int
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select_stuff::test_and_set (int i, fd_set *readfds, fd_set *writefds,
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fd_set *exceptfds)
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{
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select_record *s = NULL;
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if (UNIX_FD_ISSET (i, readfds) && (s = cygheap->fdtab.select_read (i, s)) == NULL)
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return 0; /* error */
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if (UNIX_FD_ISSET (i, writefds) && (s = cygheap->fdtab.select_write (i, s)) == NULL)
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return 0; /* error */
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if (UNIX_FD_ISSET (i, exceptfds) && (s = cygheap->fdtab.select_except (i, s)) == NULL)
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return 0; /* error */
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|
if (s == NULL)
|
|
return 1; /* nothing to do */
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|
|
|
if (s->read_ready || s->write_ready || s->except_ready)
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|
always_ready = true;
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|
|
|
if (s->windows_handle)
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|
windows_used = true;
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|
|
|
s->next = start.next;
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|
start.next = s;
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|
return 1;
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|
}
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|
|
|
/* The heart of select. Waits for an fd to do something interesting. */
|
|
int
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|
select_stuff::wait (fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
|
|
DWORD ms)
|
|
{
|
|
int wait_ret;
|
|
HANDLE w4[MAXIMUM_WAIT_OBJECTS];
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|
select_record *s = &start;
|
|
int m = 0;
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|
int res = 0;
|
|
|
|
w4[m++] = signal_arrived; /* Always wait for the arrival of a signal. */
|
|
/* 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 -1;
|
|
}
|
|
if (!s->startup (s, this))
|
|
{
|
|
s->set_select_errno ();
|
|
return -1;
|
|
}
|
|
if (s->h == NULL)
|
|
continue;
|
|
for (int i = 1; i < m; i++)
|
|
if (w4[i] == s->h)
|
|
goto next_while;
|
|
w4[m++] = s->h;
|
|
next_while:
|
|
continue;
|
|
}
|
|
|
|
LONGLONG start_time = gtod.msecs (); /* Record the current time for later use. */
|
|
|
|
debug_printf ("m %d, ms %u", m, ms);
|
|
for (;;)
|
|
{
|
|
if (!windows_used)
|
|
wait_ret = WaitForMultipleObjects (m, w4, FALSE, ms);
|
|
else
|
|
wait_ret = MsgWaitForMultipleObjects (m, w4, FALSE, ms, QS_ALLINPUT);
|
|
|
|
switch (wait_ret)
|
|
{
|
|
case WAIT_OBJECT_0:
|
|
select_printf ("signal received");
|
|
set_sig_errno (EINTR);
|
|
return -1;
|
|
case WAIT_FAILED:
|
|
select_printf ("WaitForMultipleObjects failed");
|
|
s->set_select_errno ();
|
|
return -1;
|
|
case WAIT_TIMEOUT:
|
|
select_printf ("timed out");
|
|
res = 1;
|
|
goto out;
|
|
}
|
|
|
|
select_printf ("woke up. wait_ret %d. verifying", wait_ret);
|
|
s = &start;
|
|
bool gotone = false;
|
|
/* Some types of object (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 ());
|
|
return -1; /* Somebody detected an error */
|
|
}
|
|
else if ((((wait_ret >= m && s->windows_handle) || s->h == w4[wait_ret])) &&
|
|
s->verify (s, readfds, writefds, exceptfds))
|
|
gotone = true;
|
|
|
|
select_printf ("gotone %d", gotone);
|
|
if (gotone)
|
|
goto out;
|
|
|
|
if (ms == INFINITE)
|
|
{
|
|
select_printf ("looping");
|
|
continue;
|
|
}
|
|
select_printf ("recalculating ms");
|
|
|
|
LONGLONG now = gtod.msecs ();
|
|
if (now > (start_time + ms))
|
|
{
|
|
select_printf ("timed out after verification");
|
|
goto out;
|
|
}
|
|
ms -= (now - start_time);
|
|
start_time = now;
|
|
select_printf ("ms now %u", ms);
|
|
}
|
|
|
|
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 ()))
|
|
{
|
|
/* Special AF_LOCAL handling. */
|
|
if (!me->read_ready && sock->connect_state () == connect_pending
|
|
&& sock->af_local_connect ())
|
|
{
|
|
if (me->read_selected)
|
|
UNIX_FD_SET (me->fd, readfds);
|
|
sock->connect_state (connect_failed);
|
|
}
|
|
else
|
|
sock->connect_state (connected);
|
|
}
|
|
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;
|
|
select_printf ("returning %d", n);
|
|
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
|
|
peek_pipe (select_record *s, bool from_select)
|
|
{
|
|
int n = 0;
|
|
int gotone = 0;
|
|
fhandler_base *fh = s->fh;
|
|
|
|
HANDLE h;
|
|
set_handle_or_return_if_not_open (h, s);
|
|
|
|
/* Don't perform complicated tests if we don't need to. */
|
|
if (!s->read_selected && !s->except_selected)
|
|
goto out;
|
|
|
|
if (s->read_selected)
|
|
{
|
|
if (s->read_ready)
|
|
{
|
|
select_printf ("%s, already ready for read", fh->get_name ());
|
|
gotone = 1;
|
|
goto out;
|
|
}
|
|
|
|
switch (fh->get_major ())
|
|
{
|
|
case DEV_TTYM_MAJOR:
|
|
if (((fhandler_pty_master *) fh)->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;
|
|
}
|
|
}
|
|
|
|
if (fh->get_device () == FH_PIPEW)
|
|
select_printf ("%s, select for read/except on write end of pipe",
|
|
fh->get_name ());
|
|
else if (!PeekNamedPipe (h, NULL, 0, NULL, (DWORD *) &n, NULL))
|
|
{
|
|
select_printf ("%s, PeekNamedPipe failed, %E", fh->get_name ());
|
|
n = -1;
|
|
}
|
|
|
|
if (n < 0)
|
|
{
|
|
select_printf ("%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;
|
|
}
|
|
if (n > 0 && s->read_selected)
|
|
{
|
|
select_printf ("%s, ready for read: avail %d", fh->get_name (), n);
|
|
gotone += s->read_ready = true;
|
|
}
|
|
if (!gotone && s->fh->hit_eof ())
|
|
{
|
|
select_printf ("%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)
|
|
{
|
|
if (s->write_ready)
|
|
{
|
|
select_printf ("%s, already ready for write", fh->get_name ());
|
|
gotone++;
|
|
}
|
|
/* Do we need to do anything about SIGTTOU here? */
|
|
else if (fh->get_device () == FH_PIPER)
|
|
select_printf ("%s, select for write on read end of pipe",
|
|
fh->get_name ());
|
|
else
|
|
{
|
|
#if 0
|
|
/* FIXME: This code is not quite correct. There's no better solution
|
|
so far but to always treat the write side of the pipe as writable. */
|
|
|
|
IO_STATUS_BLOCK iosb = {0};
|
|
FILE_PIPE_LOCAL_INFORMATION fpli = {0};
|
|
|
|
if (NtQueryInformationFile (h,
|
|
&iosb,
|
|
&fpli,
|
|
sizeof (fpli),
|
|
FilePipeLocalInformation))
|
|
{
|
|
/* If NtQueryInformationFile fails, optimistically assume the
|
|
pipe is writable. This could happen on Win9x, because
|
|
NtQueryInformationFile is not available, or if we somehow
|
|
inherit a pipe that doesn't permit FILE_READ_ATTRIBUTES
|
|
access on the write end. */
|
|
select_printf ("%s, NtQueryInformationFile failed",
|
|
fh->get_name ());
|
|
gotone += s->write_ready = true;
|
|
}
|
|
/* Ensure that enough space is available for atomic writes,
|
|
as required by POSIX. Subsequent writes with size > PIPE_BUF
|
|
can still block, but most (all?) UNIX variants seem to work
|
|
this way (e.g., BSD, Linux, Solaris). */
|
|
else if (fpli.WriteQuotaAvailable >= PIPE_BUF)
|
|
{
|
|
select_printf ("%s, ready for write: size %lu, avail %lu",
|
|
fh->get_name (),
|
|
fpli.OutboundQuota,
|
|
fpli.WriteQuotaAvailable);
|
|
gotone += s->write_ready = true;
|
|
}
|
|
/* 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. */
|
|
else if (fpli.OutboundQuota < PIPE_BUF &&
|
|
fpli.WriteQuotaAvailable == fpli.OutboundQuota)
|
|
{
|
|
select_printf ("%s, tiny pipe: size %lu, avail %lu",
|
|
fh->get_name (),
|
|
fpli.OutboundQuota,
|
|
fpli.WriteQuotaAvailable);
|
|
gotone += s->write_ready = true;
|
|
}
|
|
#else
|
|
gotone += s->write_ready = true;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
return gotone;
|
|
}
|
|
|
|
static int start_thread_pipe (select_record *me, select_stuff *stuff);
|
|
|
|
struct pipeinf
|
|
{
|
|
cygthread *thread;
|
|
bool stop_thread_pipe;
|
|
select_record *start;
|
|
};
|
|
|
|
static DWORD WINAPI
|
|
thread_pipe (void *arg)
|
|
{
|
|
pipeinf *pi = (pipeinf *) arg;
|
|
bool gotone = false;
|
|
DWORD sleep_time = 0;
|
|
|
|
for (;;)
|
|
{
|
|
select_record *s = pi->start;
|
|
while ((s = s->next))
|
|
if (s->startup == start_thread_pipe)
|
|
{
|
|
if (peek_pipe (s, true))
|
|
gotone = true;
|
|
if (pi->stop_thread_pipe)
|
|
{
|
|
select_printf ("stopping");
|
|
goto out;
|
|
}
|
|
}
|
|
/* Paranoid check */
|
|
if (pi->stop_thread_pipe)
|
|
{
|
|
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_pipe (select_record *me, select_stuff *stuff)
|
|
{
|
|
if (stuff->device_specific_pipe)
|
|
{
|
|
me->h = *((pipeinf *) stuff->device_specific_pipe)->thread;
|
|
return 1;
|
|
}
|
|
pipeinf *pi = new pipeinf;
|
|
pi->start = &stuff->start;
|
|
pi->stop_thread_pipe = false;
|
|
pi->thread = new cygthread (thread_pipe, 0, pi, "select_pipe");
|
|
me->h = *pi->thread;
|
|
if (!me->h)
|
|
return 0;
|
|
stuff->device_specific_pipe = (void *) pi;
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
pipe_cleanup (select_record *, select_stuff *stuff)
|
|
{
|
|
pipeinf *pi = (pipeinf *) stuff->device_specific_pipe;
|
|
if (pi && pi->thread)
|
|
{
|
|
pi->stop_thread_pipe = true;
|
|
pi->thread->detach ();
|
|
delete pi;
|
|
stuff->device_specific_pipe = NULL;
|
|
}
|
|
}
|
|
|
|
int
|
|
fhandler_pipe::ready_for_read (int fd, DWORD howlong)
|
|
{
|
|
int res;
|
|
if (!howlong)
|
|
res = fhandler_base::ready_for_read (fd, howlong);
|
|
else
|
|
res = 1;
|
|
return res;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_pipe::select_read (select_record *s)
|
|
{
|
|
if (!s)
|
|
s = new select_record;
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
s = new select_record;
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
s = new select_record;
|
|
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
|
|
{
|
|
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
|
|
{
|
|
fh->send_winch_maybe ();
|
|
if (irec.EventType == MOUSE_EVENT
|
|
&& fh->mouse_aware ()
|
|
&& (irec.Event.MouseEvent.dwEventFlags == 0
|
|
|| irec.Event.MouseEvent.dwEventFlags == DOUBLE_CLICK))
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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_tty_common::select_read (select_record *s)
|
|
{
|
|
return ((fhandler_pipe *) this)->fhandler_pipe::select_read (s);
|
|
}
|
|
|
|
select_record *
|
|
fhandler_tty_common::select_write (select_record *s)
|
|
{
|
|
return ((fhandler_pipe *) this)->fhandler_pipe::select_write (s);
|
|
}
|
|
|
|
select_record *
|
|
fhandler_tty_common::select_except (select_record *s)
|
|
{
|
|
return ((fhandler_pipe *) this)->fhandler_pipe::select_except (s);
|
|
}
|
|
|
|
static int
|
|
verify_tty_slave (select_record *me, fd_set *readfds, fd_set *writefds,
|
|
fd_set *exceptfds)
|
|
{
|
|
if (WaitForSingleObject (me->h, 0) == WAIT_OBJECT_0)
|
|
me->read_ready = true;
|
|
return set_bits (me, readfds, writefds, exceptfds);
|
|
}
|
|
|
|
select_record *
|
|
fhandler_tty_slave::select_read (select_record *s)
|
|
{
|
|
if (!s)
|
|
s = new select_record;
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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);
|
|
|
|
struct serialinf
|
|
{
|
|
cygthread *thread;
|
|
bool stop_thread_serial;
|
|
select_record *start;
|
|
};
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
HANDLE w4[2];
|
|
DWORD to;
|
|
|
|
w4[0] = fh->io_status.hEvent;
|
|
w4[1] = signal_arrived;
|
|
to = 10;
|
|
|
|
switch (WaitForMultipleObjects (2, w4, FALSE, to))
|
|
{
|
|
case WAIT_OBJECT_0:
|
|
if (!ClearCommError (h, &fh->ev, &st))
|
|
{
|
|
debug_printf ("ClearCommError");
|
|
goto err;
|
|
}
|
|
else if (!st.cbInQue)
|
|
Sleep (to);
|
|
else
|
|
{
|
|
return s->read_ready = true;
|
|
select_printf ("got something");
|
|
}
|
|
break;
|
|
case WAIT_OBJECT_0 + 1:
|
|
select_printf ("interrupt");
|
|
set_sig_errno (EINTR);
|
|
ready = -1;
|
|
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)
|
|
{
|
|
serialinf *si = (serialinf *) arg;
|
|
bool gotone = false;
|
|
|
|
for (;;)
|
|
{
|
|
select_record *s = si->start;
|
|
while ((s = s->next))
|
|
if (s->startup == start_thread_serial)
|
|
{
|
|
if (peek_serial (s, true))
|
|
gotone = true;
|
|
}
|
|
if (si->stop_thread_serial)
|
|
{
|
|
select_printf ("stopping");
|
|
break;
|
|
}
|
|
if (gotone)
|
|
break;
|
|
}
|
|
|
|
select_printf ("exiting");
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
start_thread_serial (select_record *me, select_stuff *stuff)
|
|
{
|
|
if (stuff->device_specific_serial)
|
|
{
|
|
me->h = *((serialinf *) stuff->device_specific_serial)->thread;
|
|
return 1;
|
|
}
|
|
serialinf *si = new serialinf;
|
|
si->start = &stuff->start;
|
|
si->stop_thread_serial = false;
|
|
si->thread = new cygthread (thread_serial, 0, si, "select_serial");
|
|
me->h = *si->thread;
|
|
stuff->device_specific_serial = (void *) si;
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
serial_cleanup (select_record *, select_stuff *stuff)
|
|
{
|
|
serialinf *si = (serialinf *) stuff->device_specific_serial;
|
|
if (si && si->thread)
|
|
{
|
|
si->stop_thread_serial = true;
|
|
si->thread->detach ();
|
|
delete si;
|
|
stuff->device_specific_serial = NULL;
|
|
}
|
|
}
|
|
|
|
select_record *
|
|
fhandler_serial::select_read (select_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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;
|
|
}
|
|
|
|
int
|
|
fhandler_base::ready_for_read (int fd, DWORD howlong)
|
|
{
|
|
bool avail = false;
|
|
select_record me (this);
|
|
me.fd = fd;
|
|
while (!avail)
|
|
{
|
|
select_read (&me);
|
|
avail = me.read_ready ?: me.peek (&me, false);
|
|
|
|
if (fd >= 0 && cygheap->fdtab.not_open (fd))
|
|
{
|
|
set_sig_errno (EBADF);
|
|
avail = false;
|
|
break;
|
|
}
|
|
|
|
if (howlong != INFINITE)
|
|
{
|
|
if (!avail)
|
|
set_sig_errno (EAGAIN);
|
|
break;
|
|
}
|
|
|
|
if (WaitForSingleObject (signal_arrived, avail ? 0 : 10) == WAIT_OBJECT_0)
|
|
{
|
|
debug_printf ("interrupted");
|
|
set_sig_errno (EINTR);
|
|
avail = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
select_printf ("read_ready %d, avail %d", me.read_ready, avail);
|
|
return avail;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_base::select_read (select_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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 *);
|
|
|
|
struct socketinf
|
|
{
|
|
cygthread *thread;
|
|
int max_w4;
|
|
int num_w4;
|
|
LONG *ser_num;
|
|
HANDLE *w4;
|
|
select_record *start;
|
|
};
|
|
|
|
static DWORD WINAPI
|
|
thread_socket (void *arg)
|
|
{
|
|
socketinf *si = (socketinf *) arg;
|
|
DWORD timeout = 64 / (si->max_w4 / MAXIMUM_WAIT_OBJECTS);
|
|
bool event = false;
|
|
|
|
select_printf ("stuff_start %p", si->start);
|
|
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->max_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_OBJECT_0:
|
|
if (!i) /* Socket event set. */
|
|
goto out;
|
|
break;
|
|
case WAIT_TIMEOUT:
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
out:
|
|
select_printf ("leaving thread_socket");
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
start_thread_socket (select_record *me, select_stuff *stuff)
|
|
{
|
|
socketinf *si;
|
|
|
|
if ((si = (socketinf *) stuff->device_specific_socket))
|
|
{
|
|
me->h = *si->thread;
|
|
return 1;
|
|
}
|
|
|
|
si = new socketinf;
|
|
si->ser_num = (LONG *) malloc (MAXIMUM_WAIT_OBJECTS * sizeof (LONG));
|
|
si->w4 = (HANDLE *) malloc (MAXIMUM_WAIT_OBJECTS * sizeof (HANDLE));
|
|
if (!si->ser_num || !si->w4)
|
|
return 0;
|
|
si->max_w4 = MAXIMUM_WAIT_OBJECTS;
|
|
select_record *s = &stuff->start;
|
|
if (_my_tls.locals.select_sockevt != INVALID_HANDLE_VALUE)
|
|
si->w4[0] = _my_tls.locals.select_sockevt;
|
|
else if (!(si->w4[0] = CreateEvent (&sec_none_nih, TRUE, FALSE, NULL)))
|
|
return 1;
|
|
else
|
|
_my_tls.locals.select_sockevt = si->w4[0];
|
|
si->num_w4 = 1;
|
|
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 >= si->max_w4)
|
|
{
|
|
LONG *nser = (LONG *) realloc (si->ser_num,
|
|
(si->max_w4 + MAXIMUM_WAIT_OBJECTS)
|
|
* sizeof (LONG));
|
|
if (!nser)
|
|
return 0;
|
|
si->ser_num = nser;
|
|
HANDLE *nw4 = (HANDLE *) realloc (si->w4,
|
|
(si->max_w4 + MAXIMUM_WAIT_OBJECTS)
|
|
* sizeof (HANDLE));
|
|
if (!nw4)
|
|
return 0;
|
|
si->w4 = nw4;
|
|
si->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 = (void *) si;
|
|
si->start = &stuff->start;
|
|
select_printf ("stuff_start %p", &stuff->start);
|
|
si->thread = new cygthread (thread_socket, 0, si, "select_socket");
|
|
me->h = *si->thread;
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
socket_cleanup (select_record *, select_stuff *stuff)
|
|
{
|
|
socketinf *si = (socketinf *) stuff->device_specific_socket;
|
|
select_printf ("si %p si->thread %p", si, si ? si->thread : NULL);
|
|
if (si && si->thread)
|
|
{
|
|
SetEvent (si->w4[0]);
|
|
/* Wait for thread to go away */
|
|
si->thread->detach ();
|
|
ResetEvent (si->w4[0]);
|
|
stuff->device_specific_socket = NULL;
|
|
if (si->ser_num)
|
|
free (si->ser_num);
|
|
if (si->w4)
|
|
free (si->w4);
|
|
delete si;
|
|
}
|
|
select_printf ("returning");
|
|
}
|
|
|
|
select_record *
|
|
fhandler_socket::select_read (select_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
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);
|
|
|
|
if (me->read_selected && me->read_ready)
|
|
return 1;
|
|
|
|
if (PeekMessage (&m, (HWND) h, 0, 0, PM_NOREMOVE))
|
|
{
|
|
me->read_ready = true;
|
|
select_printf ("window %d(%p) ready", me->fd, me->fh->get_handle ());
|
|
return 1;
|
|
}
|
|
|
|
select_printf ("window %d(%p) not ready", me->fd, me->fh->get_handle ());
|
|
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_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
s->startup = no_startup;
|
|
}
|
|
s->verify = verify_windows;
|
|
s->peek = peek_windows;
|
|
s->read_selected = true;
|
|
s->read_ready = false;
|
|
s->h = get_handle ();
|
|
s->windows_handle = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_windows::select_write (select_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->peek = peek_windows;
|
|
s->h = get_handle ();
|
|
s->write_selected = true;
|
|
s->write_ready = true;
|
|
s->windows_handle = true;
|
|
return s;
|
|
}
|
|
|
|
select_record *
|
|
fhandler_windows::select_except (select_record *s)
|
|
{
|
|
if (!s)
|
|
{
|
|
s = new select_record;
|
|
s->startup = no_startup;
|
|
s->verify = verify_ok;
|
|
}
|
|
s->peek = peek_windows;
|
|
s->h = get_handle ();
|
|
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);
|
|
|
|
struct mailslotinf
|
|
{
|
|
cygthread *thread;
|
|
bool stop_thread_mailslot;
|
|
select_record *start;
|
|
};
|
|
|
|
static DWORD WINAPI
|
|
thread_mailslot (void *arg)
|
|
{
|
|
mailslotinf *mi = (mailslotinf *) 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_mailslot)
|
|
{
|
|
select_printf ("stopping");
|
|
goto out;
|
|
}
|
|
}
|
|
/* Paranoid check */
|
|
if (mi->stop_thread_mailslot)
|
|
{
|
|
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 = *((mailslotinf *) stuff->device_specific_mailslot)->thread;
|
|
return 1;
|
|
}
|
|
mailslotinf *mi = new mailslotinf;
|
|
mi->start = &stuff->start;
|
|
mi->stop_thread_mailslot = false;
|
|
mi->thread = new cygthread (thread_mailslot, 0, mi, "select_mailslot");
|
|
me->h = *mi->thread;
|
|
if (!me->h)
|
|
return 0;
|
|
stuff->device_specific_mailslot = (void *) mi;
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
mailslot_cleanup (select_record *, select_stuff *stuff)
|
|
{
|
|
mailslotinf *mi = (mailslotinf *) stuff->device_specific_mailslot;
|
|
if (mi && mi->thread)
|
|
{
|
|
mi->stop_thread_mailslot = true;
|
|
mi->thread->detach ();
|
|
delete mi;
|
|
stuff->device_specific_mailslot = NULL;
|
|
}
|
|
}
|
|
|
|
select_record *
|
|
fhandler_mailslot::select_read (select_record *s)
|
|
{
|
|
if (!s)
|
|
s = new select_record;
|
|
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;
|
|
}
|