Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 1998 - 2001 Pekka Riikonen
+ Copyright (C) 1998 - 2004 Pekka Riikonen
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
+ the Free Software Foundation; version 2 of the License.
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
/* Calls normal select() system call. */
-int silc_select(SilcScheduleFd fds, uint32 fds_count, struct timeval *timeout)
+int silc_select(SilcScheduleFd fds, SilcUInt32 fds_count,
+ struct timeval *timeout)
{
fd_set in, out;
int ret, i, max_fd = 0;
return ret;
}
-#ifdef SILC_THREADS
+#define SIGNAL_COUNT 32
-/* Internal wakeup context. */
typedef struct {
+ SilcUInt32 signal;
+ SilcTaskCallback callback;
+ void *context;
+ bool call;
+} SilcUnixSignal;
+
+/* Internal context. */
+typedef struct {
+ void *app_context;
int wakeup_pipe[2];
SilcTask wakeup_task;
-} *SilcUnixWakeup;
+ sigset_t signals;
+ sigset_t signals_blocked;
+ SilcUnixSignal signal_call[SIGNAL_COUNT];
+} *SilcUnixScheduler;
+
+#ifdef SILC_THREADS
SILC_TASK_CALLBACK(silc_schedule_wakeup_cb)
{
- SilcUnixWakeup wakeup = (SilcUnixWakeup)context;
+ SilcUnixScheduler internal = (SilcUnixScheduler)context;
unsigned char c;
- read(wakeup->wakeup_pipe[0], &c, 1);
+ read(internal->wakeup_pipe[0], &c, 1);
}
#endif /* SILC_THREADS */
-/* Initializes the wakeup of the scheduler. In multi-threaded environment
+/* Initializes the platform specific scheduler. This for example initializes
+ the wakeup mechanism of the scheduler. In multi-threaded environment
the scheduler needs to be wakenup when tasks are added or removed from
- the task queues. This will initialize the wakeup for the scheduler.
- Any tasks that needs to be registered must be registered to the `queue'.
- It is quaranteed that the scheduler will automatically free any
- registered tasks in this queue. This is system specific routine. */
+ the task queues. Returns context to the platform specific scheduler. */
-void *silc_schedule_wakeup_init(SilcSchedule schedule)
+void *silc_schedule_internal_init(SilcSchedule schedule,
+ void *app_context)
{
-#ifdef SILC_THREADS
- SilcUnixWakeup wakeup;
+ SilcUnixScheduler internal;
+
+ internal = silc_calloc(1, sizeof(*internal));
+ if (!internal)
+ return NULL;
- wakeup = silc_calloc(1, sizeof(*wakeup));
+ sigemptyset(&internal->signals);
- if (pipe(wakeup->wakeup_pipe)) {
- silc_free(wakeup);
+#ifdef SILC_THREADS
+ if (pipe(internal->wakeup_pipe)) {
+ SILC_LOG_ERROR(("pipe() fails: %s", strerror(errno)));
+ silc_free(internal);
return NULL;
}
- wakeup->wakeup_task =
- silc_schedule_task_add(schedule, wakeup->wakeup_pipe[0],
- silc_schedule_wakeup_cb, wakeup,
- 0, 0, SILC_TASK_FD,
+ internal->wakeup_task =
+ silc_schedule_task_add(schedule, internal->wakeup_pipe[0],
+ silc_schedule_wakeup_cb, internal,
+ 0, 0, SILC_TASK_FD,
SILC_TASK_PRI_NORMAL);
- if (!wakeup->wakeup_task) {
- close(wakeup->wakeup_pipe[0]);
- close(wakeup->wakeup_pipe[1]);
- silc_free(wakeup);
+ if (!internal->wakeup_task) {
+ SILC_LOG_ERROR(("Could not add a wakeup task, threads won't work"));
+ close(internal->wakeup_pipe[0]);
+ close(internal->wakeup_pipe[1]);
+ silc_free(internal);
return NULL;
}
-
- return (void *)wakeup;
#endif
- return NULL;
+
+ internal->app_context = app_context;
+
+ return (void *)internal;
}
-/* Uninitializes the system specific wakeup. */
+void silc_schedule_internal_signals_block(void *context);
+void silc_schedule_internal_signals_unblock(void *context);
+
+/* Uninitializes the platform specific scheduler context. */
-void silc_schedule_wakeup_uninit(void *context)
+void silc_schedule_internal_uninit(void *context)
{
-#ifdef SILC_THREADS
- SilcUnixWakeup wakeup = (SilcUnixWakeup)context;
+ SilcUnixScheduler internal = (SilcUnixScheduler)context;
- if (!wakeup)
+ if (!internal)
return;
- close(wakeup->wakeup_pipe[0]);
- close(wakeup->wakeup_pipe[1]);
- silc_free(wakeup);
+#ifdef SILC_THREADS
+ close(internal->wakeup_pipe[0]);
+ close(internal->wakeup_pipe[1]);
#endif
+
+ silc_free(internal);
}
/* Wakes up the scheduler */
-void silc_schedule_wakeup_internal(void *context)
+void silc_schedule_internal_wakeup(void *context)
{
#ifdef SILC_THREADS
- SilcUnixWakeup wakeup = (SilcUnixWakeup)context;
+ SilcUnixScheduler internal = (SilcUnixScheduler)context;
- if (!wakeup)
+ if (!internal)
return;
- write(wakeup->wakeup_pipe[1], "!", 1);
+ write(internal->wakeup_pipe[1], "!", 1);
#endif
}
+
+void silc_schedule_internal_signal_register(void *context,
+ SilcUInt32 signal,
+ SilcTaskCallback callback,
+ void *callback_context)
+{
+ SilcUnixScheduler internal = (SilcUnixScheduler)context;
+ int i;
+
+ if (!internal)
+ return;
+
+ SILC_LOG_DEBUG(("Registering signal %d", signal));
+
+ silc_schedule_internal_signals_block(context);
+
+ for (i = 0; i < SIGNAL_COUNT; i++) {
+ if (!internal->signal_call[i].signal) {
+ internal->signal_call[i].signal = signal;
+ internal->signal_call[i].callback = callback;
+ internal->signal_call[i].context = callback_context;
+ internal->signal_call[i].call = FALSE;
+ break;
+ }
+ }
+
+ silc_schedule_internal_signals_unblock(context);
+ sigaddset(&internal->signals, signal);
+}
+
+void silc_schedule_internal_signal_unregister(void *context,
+ SilcUInt32 signal,
+ SilcTaskCallback callback,
+ void *callback_context)
+{
+ SilcUnixScheduler internal = (SilcUnixScheduler)context;
+ int i;
+
+ if (!internal)
+ return;
+
+ SILC_LOG_DEBUG(("Unregistering signal %d", signal));
+
+ silc_schedule_internal_signals_block(context);
+
+ for (i = 0; i < SIGNAL_COUNT; i++) {
+ if (internal->signal_call[i].signal == signal &&
+ internal->signal_call[i].callback == callback &&
+ internal->signal_call[i].context == callback_context) {
+ internal->signal_call[i].signal = 0;
+ internal->signal_call[i].callback = NULL;
+ internal->signal_call[i].context = NULL;
+ internal->signal_call[i].call = FALSE;
+ }
+ }
+
+ silc_schedule_internal_signals_unblock(context);
+ sigdelset(&internal->signals, signal);
+}
+
+/* Mark signal to be called later. */
+
+void silc_schedule_internal_signal_call(void *context, SilcUInt32 signal)
+{
+ SilcUnixScheduler internal = (SilcUnixScheduler)context;
+ int i;
+
+ if (!internal)
+ return;
+
+ silc_schedule_internal_signals_block(context);
+
+ for (i = 0; i < SIGNAL_COUNT; i++) {
+ if (internal->signal_call[i].signal == signal) {
+ internal->signal_call[i].call = TRUE;
+ SILC_LOG_DEBUG(("Scheduling signal %d to be called",
+ internal->signal_call[i].signal));
+ }
+ }
+
+ silc_schedule_internal_signals_unblock(context);
+}
+
+/* Call all signals */
+
+void silc_schedule_internal_signals_call(void *context,
+ SilcSchedule schedule)
+{
+ SilcUnixScheduler internal = (SilcUnixScheduler)context;
+ int i;
+
+ SILC_LOG_DEBUG(("Start"));
+
+ if (!internal)
+ return;
+
+ silc_schedule_internal_signals_block(context);
+
+ for (i = 0; i < SIGNAL_COUNT; i++) {
+ if (internal->signal_call[i].call &&
+ internal->signal_call[i].callback) {
+ SILC_LOG_DEBUG(("Calling signal %d callback",
+ internal->signal_call[i].signal));
+ internal->signal_call[i].callback(schedule, internal->app_context,
+ SILC_TASK_INTERRUPT,
+ internal->signal_call[i].signal,
+ internal->signal_call[i].context);
+ internal->signal_call[i].call = FALSE;
+ }
+ }
+
+ silc_schedule_internal_signals_unblock(context);
+}
+
+/* Block registered signals in scheduler. */
+
+void silc_schedule_internal_signals_block(void *context)
+{
+ SilcUnixScheduler internal = (SilcUnixScheduler)context;
+
+ if (!internal)
+ return;
+
+ sigprocmask(SIG_BLOCK, &internal->signals, &internal->signals_blocked);
+}
+
+/* Unblock registered signals in schedule. */
+
+void silc_schedule_internal_signals_unblock(void *context)
+{
+ SilcUnixScheduler internal = (SilcUnixScheduler)context;
+
+ if (!internal)
+ return;
+
+ sigprocmask(SIG_SETMASK, &internal->signals_blocked, NULL);
+}
projects / silc.git / blobdiff