2 * tpool-epoll.c: epoll related stuff
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Gonzalo Paniagua Javier (gonzalo@ximian.com)
8 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
9 * Copyright 2004-2011 Novell, Inc (http://www.novell.com)
10 * Copyright 2011 Xamarin Inc (http://www.xamarin.com)
13 struct _tp_epoll_data {
17 typedef struct _tp_epoll_data tp_epoll_data;
18 static void tp_epoll_modify (gpointer event_data, int fd, int operation, int events, gboolean is_new);
19 static void tp_epoll_shutdown (gpointer event_data);
20 static void tp_epoll_wait (gpointer event_data);
23 tp_epoll_init (SocketIOData *data)
25 tp_epoll_data *result;
27 result = g_new0 (tp_epoll_data, 1);
29 result->epollfd = epoll_create1 (EPOLL_CLOEXEC);
31 result->epollfd = epoll_create (256); /* The number does not really matter */
32 fcntl (result->epollfd, F_SETFD, FD_CLOEXEC);
34 if (result->epollfd == -1) {
36 if (g_getenv ("MONO_DEBUG")) {
38 g_message ("epoll_create1(EPOLL_CLOEXEC) failed: %d %s", err, g_strerror (err));
40 g_message ("epoll_create(256) failed: %d %s", err, g_strerror (err));
47 data->shutdown = tp_epoll_shutdown;
48 data->modify = tp_epoll_modify;
49 data->wait = tp_epoll_wait;
54 tp_epoll_modify (gpointer event_data, int fd, int operation, int events, gboolean is_new)
56 tp_epoll_data *data = event_data;
57 struct epoll_event evt;
60 memset (&evt, 0, sizeof (evt));
62 if ((events & MONO_POLLIN) != 0)
63 evt.events |= EPOLLIN;
64 if ((events & MONO_POLLOUT) != 0)
65 evt.events |= EPOLLOUT;
67 epoll_op = (is_new) ? EPOLL_CTL_ADD : EPOLL_CTL_MOD;
68 if (epoll_ctl (data->epollfd, epoll_op, fd, &evt) == -1) {
70 if (epoll_op == EPOLL_CTL_ADD && err == EEXIST) {
71 epoll_op = EPOLL_CTL_MOD;
72 if (epoll_ctl (data->epollfd, epoll_op, fd, &evt) == -1) {
73 g_message ("epoll_ctl(MOD): %d %s", err, g_strerror (err));
80 tp_epoll_shutdown (gpointer event_data)
82 tp_epoll_data *data = event_data;
84 close (data->epollfd);
88 #define EPOLL_ERRORS (EPOLLERR | EPOLLHUP)
89 #define EPOLL_NEVENTS 128
91 tp_epoll_wait (gpointer p)
93 SocketIOData *socket_io_data;
95 MonoInternalThread *thread;
96 struct epoll_event *events, *evt;
98 gpointer async_results [EPOLL_NEVENTS * 2]; // * 2 because each loop can add up to 2 results here
103 data = socket_io_data->event_data;
104 epollfd = data->epollfd;
105 thread = mono_thread_internal_current ();
106 events = g_new0 (struct epoll_event, EPOLL_NEVENTS);
109 mono_gc_set_skip_thread (TRUE);
113 if (THREAD_WANTS_A_BREAK (thread))
114 mono_thread_interruption_checkpoint ();
116 ready = epoll_wait (epollfd, events, EPOLL_NEVENTS, -1);
117 } while (ready == -1 && errno == EINTR);
119 mono_gc_set_skip_thread (FALSE);
125 g_warning ("epoll_wait: %d %s", err, g_strerror (err));
130 EnterCriticalSection (&socket_io_data->io_lock);
131 if (socket_io_data->inited == 3) {
133 LeaveCriticalSection (&socket_io_data->io_lock);
134 return; /* cleanup called */
138 for (i = 0; i < ready; i++) {
145 list = mono_g_hash_table_lookup (socket_io_data->sock_to_state, GINT_TO_POINTER (fd));
146 if (list != NULL && (evt->events & (EPOLLIN | EPOLL_ERRORS)) != 0) {
147 ares = get_io_event (&list, MONO_POLLIN);
149 async_results [nresults++] = ares;
152 if (list != NULL && (evt->events & (EPOLLOUT | EPOLL_ERRORS)) != 0) {
153 ares = get_io_event (&list, MONO_POLLOUT);
155 async_results [nresults++] = ares;
161 mono_g_hash_table_replace (socket_io_data->sock_to_state, GINT_TO_POINTER (fd), list);
162 p = get_events_from_list (list);
163 evt->events = (p & MONO_POLLOUT) ? EPOLLOUT : 0;
164 evt->events |= (p & MONO_POLLIN) ? EPOLLIN : 0;
165 if (epoll_ctl (epollfd, EPOLL_CTL_MOD, fd, evt) == -1) {
166 if (epoll_ctl (epollfd, EPOLL_CTL_ADD, fd, evt) == -1) {
168 g_message ("epoll(ADD): %d %s", err, g_strerror (err));
172 mono_g_hash_table_remove (socket_io_data->sock_to_state, GINT_TO_POINTER (fd));
173 epoll_ctl (epollfd, EPOLL_CTL_DEL, fd, evt);
176 LeaveCriticalSection (&socket_io_data->io_lock);
177 threadpool_append_jobs (&async_io_tp, (MonoObject **) async_results, nresults);
178 mono_gc_bzero (async_results, sizeof (gpointer) * nresults);