5 #include "utils/mono-poll.h"
7 static mono_pollfd *poll_fds;
8 static guint poll_fds_capacity;
9 static guint poll_fds_size;
12 POLL_INIT_FD (mono_pollfd *poll_fd, gint fd, gint events)
15 poll_fd->events = events;
20 poll_init (gint wakeup_pipe_fd)
22 g_assert (wakeup_pipe_fd >= 0);
25 poll_fds_capacity = 64;
27 poll_fds = g_new0 (mono_pollfd, poll_fds_capacity);
29 POLL_INIT_FD (&poll_fds [0], wakeup_pipe_fd, MONO_POLLIN);
35 poll_register_fd (gint fd, gint events, gboolean is_new)
41 g_assert (poll_fds_size <= poll_fds_capacity);
43 g_assert ((events & ~(EVENT_IN | EVENT_OUT)) == 0);
46 if (events & EVENT_IN)
47 poll_event |= MONO_POLLIN;
48 if (events & EVENT_OUT)
49 poll_event |= MONO_POLLOUT;
51 for (i = 0; i < poll_fds_size; ++i) {
52 if (poll_fds [i].fd == fd) {
54 POLL_INIT_FD (&poll_fds [i], fd, poll_event);
61 for (i = 0; i < poll_fds_size; ++i) {
62 if (poll_fds [i].fd == -1) {
63 POLL_INIT_FD (&poll_fds [i], fd, poll_event);
70 if (poll_fds_size > poll_fds_capacity) {
71 poll_fds_capacity *= 2;
72 g_assert (poll_fds_size <= poll_fds_capacity);
74 poll_fds = (mono_pollfd *)g_renew (mono_pollfd, poll_fds, poll_fds_capacity);
77 POLL_INIT_FD (&poll_fds [poll_fds_size - 1], fd, poll_event);
81 poll_remove_fd (gint fd)
87 for (i = 0; i < poll_fds_size; ++i) {
88 if (poll_fds [i].fd == fd) {
89 POLL_INIT_FD (&poll_fds [i], -1, 0);
94 /* if we don't find the fd in poll_fds,
95 * it means we try to delete it twice */
96 g_assert (i < poll_fds_size);
98 /* if we find it again, it means we added
100 for (; i < poll_fds_size; ++i)
101 g_assert (poll_fds [i].fd != fd);
103 /* reduce the value of poll_fds_size so we
104 * do not keep it too big */
105 while (poll_fds_size > 1 && poll_fds [poll_fds_size - 1].fd == -1)
110 poll_mark_bad_fds (mono_pollfd *poll_fds, gint poll_fds_size)
114 for (i = 0; i < poll_fds_size; i++) {
115 if (poll_fds [i].fd == -1)
118 switch (mono_poll (&poll_fds [i], 1, 0)) {
125 poll_fds [i].revents |= MONO_POLLNVAL;
136 poll_event_wait (void (*callback) (gint fd, gint events, gpointer user_data), gpointer user_data)
140 for (i = 0; i < poll_fds_size; ++i)
141 poll_fds [i].revents = 0;
143 mono_gc_set_skip_thread (TRUE);
146 ready = mono_poll (poll_fds, poll_fds_size, -1);
149 mono_gc_set_skip_thread (FALSE);
153 * Apart from EINTR, we only check EBADF, for the rest:
154 * EINVAL: mono_poll() 'protects' us from descriptor
155 * numbers above the limit if using select() by marking
156 * then as POLLERR. If a system poll() is being
157 * used, the number of descriptor we're passing will not
158 * be over sysconf(_SC_OPEN_MAX), as the error would have
159 * happened when opening.
161 * EFAULT: we own the memory pointed by pfds.
162 * ENOMEM: we're doomed anyway
174 ready = poll_mark_bad_fds (poll_fds, poll_fds_size);
178 g_error ("poll_event_wait: mono_poll () failed, error (%d) %s", errno, g_strerror (errno));
188 g_assert (ready > 0);
190 for (i = 0; i < poll_fds_size; ++i) {
193 if (poll_fds [i].fd == -1)
195 if (poll_fds [i].revents == 0)
198 fd = poll_fds [i].fd;
199 if (poll_fds [i].revents & (MONO_POLLIN | MONO_POLLERR | MONO_POLLHUP | MONO_POLLNVAL))
201 if (poll_fds [i].revents & (MONO_POLLOUT | MONO_POLLERR | MONO_POLLHUP | MONO_POLLNVAL))
203 if (poll_fds [i].revents & (MONO_POLLERR | MONO_POLLHUP | MONO_POLLNVAL))
206 callback (fd, events, user_data);
215 static ThreadPoolIOBackend backend_poll = {
217 .register_fd = poll_register_fd,
218 .remove_fd = poll_remove_fd,
219 .event_wait = poll_event_wait,