47063f00e4
operators to simplify testing for directory and attributes, throughout.
* path.h (path_conv::exists): New method.
(path_conv::has_attribute): Ditto.
(path_conv::isdir): Ditto.
(path_conv::DWORD &): New operator.
(path_conv::int &): Ditto.
* dir.cc (rmdir): Eliminate a goto.
* dtable.cc (dtable::build_fhandler): Accept opt and suffix info for
path_conv.check. Return fh == NULL on path_conv error. Pass unit to set_name
as appropriate.
(dtable::reset_unix_path_name): New method.
* dtable.h (dtable): Declare new method. Reflect arg changes to
build_fhandler.
* fhandler.cc (fhandler_disk_dummy_name): Eliminate.
(fhandler_base::set_name): Expect paths to be NULL. Build unix_path_name from
win32_path_name when it is a device.
(fhandler_base::reset_unix_path_name): New method.
(fhandler_base::raw_read): Report EISDIR when ERROR_INVALID_FUNCTION or
ERROR_INVALID_PARAMETER and reading a directory.
(fhandler_disk_file::fstat): Don't call stat_dev since we should now never be
calling fhandler_disk_file methods with devices.
(fhandler_base::fhandler_base): Clear {unix,win32}_path_name.
(fhandler_base::~fhandler_base): Always free {unix,win32}_path_name.
(fhandler_disk_file::fhandler_disk_file): Remove set_no_free_names kludge.
(fhandler_disk_file::open): Ditto.
* fhandler.h (fhandler_base::no_free_names): Eliminate.
(fhandler_base::set_no_free_names): Ditto.
* fhandler_tty.cc (fhandler_tty_slave::fhandler_tty_slave): Don't set
unix_path_name here.
* path.cc (fchdir): Lock fd table throughout. Use new
dtable::reset_unix_path_name method to reset path.
* syscalls.cc (stat_worker): Reorganize to always call fstat method. Pass
path_conv method to fhandler_*::open.
(chroot): Elminate a goto.
99 lines
2.4 KiB
C++
99 lines
2.4 KiB
C++
/* poll.cc. Implements poll(2) via usage of select(2) call.
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Copyright 2000, 2001 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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#include "winsup.h"
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#include <sys/time.h>
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#include <sys/poll.h>
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#include <errno.h>
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#include "security.h"
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#include "fhandler.h"
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#include "path.h"
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#include "dtable.h"
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#include "cygheap.h"
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#include "cygerrno.h"
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#include "sigproc.h"
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extern "C"
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int
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poll (struct pollfd *fds, unsigned int nfds, int timeout)
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{
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int max_fd = 0;
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fd_set *open_fds, *read_fds, *write_fds, *except_fds;
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struct timeval tv = { timeout / 1000, (timeout % 1000) * 1000 };
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sigframe thisframe (mainthread);
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for (unsigned int i = 0; i < nfds; ++i)
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if (fds[i].fd > max_fd)
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max_fd = fds[i].fd;
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size_t fds_size = howmany(max_fd + 1, NFDBITS) * sizeof (fd_mask);
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open_fds = (fd_set *) alloca (fds_size);
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read_fds = (fd_set *) alloca (fds_size);
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write_fds = (fd_set *) alloca (fds_size);
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except_fds = (fd_set *) alloca (fds_size);
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if (!open_fds || !read_fds || !write_fds || !except_fds)
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{
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set_errno (ENOMEM);
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return -1;
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}
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memset (open_fds, 0, fds_size);
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memset (read_fds, 0, fds_size);
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memset (write_fds, 0, fds_size);
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memset (except_fds, 0, fds_size);
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bool invalid_fds = false;
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for (unsigned int i = 0; i < nfds; ++i)
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if (!cygheap->fdtab.not_open (fds[i].fd))
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{
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FD_SET (fds[i].fd, open_fds);
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if (fds[i].events & POLLIN)
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FD_SET (fds[i].fd, read_fds);
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if (fds[i].events & POLLOUT)
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FD_SET (fds[i].fd, write_fds);
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if (fds[i].events & POLLPRI)
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FD_SET (fds[i].fd, except_fds);
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}
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else
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invalid_fds = true;
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int ret = 0;
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if (!invalid_fds)
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ret = cygwin_select (max_fd + 1, read_fds, write_fds, except_fds,
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timeout < 0 ? NULL : &tv);
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for (unsigned int i = 0; i < nfds; ++i)
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{
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if (!FD_ISSET (fds[i].fd, open_fds))
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{
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fds[i].revents = POLLNVAL;
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ret++;
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}
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else if (cygheap->fdtab.not_open(fds[i].fd))
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fds[i].revents = POLLHUP;
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else if (ret < 0)
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fds[i].revents = POLLERR;
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else
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{
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fds[i].revents = 0;
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if (FD_ISSET (fds[i].fd, read_fds))
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fds[i].revents |= POLLIN;
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if (FD_ISSET (fds[i].fd, write_fds))
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fds[i].revents |= POLLOUT;
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if (FD_ISSET (fds[i].fd, except_fds))
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fds[i].revents |= POLLPRI;
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}
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}
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return ret;
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}
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