diff options
Diffstat (limited to 'winsup/cygwin/poll.cc')
-rw-r--r-- | winsup/cygwin/poll.cc | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/winsup/cygwin/poll.cc b/winsup/cygwin/poll.cc deleted file mode 100644 index fc51be1..0000000 --- a/winsup/cygwin/poll.cc +++ /dev/null @@ -1,84 +0,0 @@ -/* poll.cc. Implements poll(2) via usage of select(2) call. - - Copyright 2000 Cygnus Solutions. - - This file is part of Cygwin. - - This software is a copyrighted work licensed under the terms of the - Cygwin license. Please consult the file "CYGWIN_LICENSE" for - details. */ - -#include "winsup.h" -#include <sys/poll.h> -#include <errno.h> -#include "fhandler.h" -#include "dtable.h" -#include "cygerrno.h" - -extern "C" -int -poll (struct pollfd *fds, unsigned int nfds, int timeout) -{ - int max_fd = 0; - fd_set *open_fds, *read_fds, *write_fds, *except_fds; - struct timeval tv = { timeout / 1000, (timeout % 1000) * 1000 }; - - for (unsigned int i = 0; i < nfds; ++i) - if (fds[i].fd > max_fd) - max_fd = fds[i].fd; - - size_t fds_size = howmany(max_fd + 1, NFDBITS) * sizeof (fd_mask); - - open_fds = (fd_set *) alloca (fds_size); - read_fds = (fd_set *) alloca (fds_size); - write_fds = (fd_set *) alloca (fds_size); - except_fds = (fd_set *) alloca (fds_size); - - if (!open_fds || !read_fds || !write_fds || !except_fds) - { - set_errno (ENOMEM); - return -1; - } - - memset (open_fds, 0, fds_size); - memset (read_fds, 0, fds_size); - memset (write_fds, 0, fds_size); - memset (except_fds, 0, fds_size); - - for (unsigned int i = 0; i < nfds; ++i) - if (!fdtab.not_open (fds[i].fd)) - { - FD_SET (fds[i].fd, open_fds); - if (fds[i].events & POLLIN) - FD_SET (fds[i].fd, read_fds); - if (fds[i].events & POLLOUT) - FD_SET (fds[i].fd, write_fds); - if (fds[i].events & POLLPRI) - FD_SET (fds[i].fd, except_fds); - } - - int ret = cygwin_select (max_fd + 1, read_fds, write_fds, except_fds, - timeout < 0 ? NULL : &tv); - - for (unsigned int i = 0; i < nfds; ++i) - { - if (!FD_ISSET (fds[i].fd, open_fds)) - fds[i].revents = POLLNVAL; - else if (fdtab.not_open(fds[i].fd)) - fds[i].revents = POLLHUP; - else if (ret < 0) - fds[i].revents = POLLERR; - else - { - fds[i].revents = 0; - if (FD_ISSET (fds[i].fd, read_fds)) - fds[i].revents |= POLLIN; - if (FD_ISSET (fds[i].fd, write_fds)) - fds[i].revents |= POLLOUT; - if (FD_ISSET (fds[i].fd, except_fds)) - fds[i].revents |= POLLPRI; - } - } - - return ret; -} |