updates.

[silc.git] / lib / silcutil / unix / silcunixschedule.c

diff --git a/lib/silcutil/unix/silcunixschedule.c b/lib/silcutil/unix/silcunixschedule.c
index 951e1aeab53fa223355b8974576396733a5fe2f3..4c70827a5a290eaf4f3d93100b5a867885856139 100644 (file)
--- a/lib/silcutil/unix/silcunixschedule.c
+++ b/lib/silcutil/unix/silcunixschedule.c
@@ -28,3 +28,86 @@ int silc_select(int n, fd_set *readfds, fd_set *writefds,
 {
   return select(n, readfds, writefds, exceptfds, timeout);
 }
+
+#ifdef SILC_THREADS
+
+/* Internal wakeup context. */
+typedef struct {
+  int wakeup_pipe[2];
+  SilcTask wakeup_task;
+} *SilcUnixWakeup;
+
+SILC_TASK_CALLBACK(silc_schedule_wakeup_cb)
+{
+  SilcUnixWakeup wakeup = (SilcUnixWakeup)context;
+  unsigned char c;
+
+  read(wakeup->wakeup_pipe[0], &c, 1);
+}
+
+#endif /* SILC_THREADS */
+
+/* Initializes the wakeup 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. */
+
+void *silc_schedule_wakeup_init(void *queue)
+{
+#ifdef SILC_THREADS
+  SilcUnixWakeup wakeup;
+
+  wakeup = silc_calloc(1, sizeof(*wakeup));
+
+  if (pipe(wakeup->wakeup_pipe)) {
+    silc_free(wakeup);
+    return NULL;
+  }
+
+  wakeup->wakeup_task = silc_task_register(queue, wakeup->wakeup_pipe[0],
+                                          silc_schedule_wakeup_cb, wakeup,
+                                          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);
+    return NULL;
+  }
+
+  return (void *)wakeup;
+#endif
+  return NULL;
+}
+
+/* Uninitializes the system specific wakeup. */
+
+void silc_schedule_wakeup_uninit(void *context)
+{
+#ifdef SILC_THREADS
+  SilcUnixWakeup wakeup = (SilcUnixWakeup)context;
+
+  if (!wakeup)
+    return;
+
+  close(wakeup->wakeup_pipe[0]);
+  close(wakeup->wakeup_pipe[1]);
+  silc_free(wakeup);
+#endif
+}
+
+/* Wakes up the scheduler */
+
+void silc_schedule_wakeup_internal(void *context)
+{
+#ifdef SILC_THREADS
+  SilcUnixWakeup wakeup = (SilcUnixWakeup)context;
+
+  if (!wakeup)
+    return;
+
+  write(wakeup->wakeup_pipe[1], "!", 1);
+#endif
+}