Author: Pekka Riikonen <priikone@silcnet.org>
- Copyright (C) 2001 - 2005 Pekka Riikonen
+ Copyright (C) 2001 - 2007 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; 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
*/
/* $Id$ */
-#include "silcincludes.h"
+#include "silc.h"
+
+/**************************** SILC Thread API *******************************/
#ifdef SILC_THREADS
{
#ifdef SILC_THREADS
SilcWin32Thread thread = TlsGetValue(silc_thread_tls);
-
+
if (thread) {
/* If the thread is waitable the memory is freed only in silc_thread_wait
by another thread. If not waitable, free it now. */
HANDLE handle = GetCurrentThread ();
HANDLE process = GetCurrentProcess ();
self = silc_calloc(1, sizeof(*self));
- DuplicateHandle(process, handle, process,
- &self->thread, 0, FALSE,
+ DuplicateHandle(process, handle, process,
+ &self->thread, 0, FALSE,
DUPLICATE_SAME_ACCESS);
TlsSetValue(silc_thread_tls, self);
}
return (SilcThread)self;
- #else
+#else
return NULL;
#endif
}
return FALSE;
#endif
}
+
+void silc_thread_yield(void)
+{
+#ifdef SILC_THREADS
+ SleepEx (0,0);
+#endif /* SILC_THREADS */
+}
+
+
+/***************************** SILC Mutex API *******************************/
+
+/* SILC Mutex structure */
+struct SilcMutexStruct {
+#ifdef SILC_THREADS
+ CRITICAL_SECTION mutex;
+#endif /* SILC_THREADS */
+ unsigned int locked : 1;
+};
+
+SilcBool silc_mutex_alloc(SilcMutex *mutex)
+{
+#ifdef SILC_THREADS
+ *mutex = silc_calloc(1, sizeof(**mutex));
+ if (!(*mutex))
+ return FALSE;
+ InitializeCriticalSection(&((*mutex)->mutex));
+ return TRUE;
+#else
+ return FALSE;
+#endif /* SILC_THREADS */
+}
+
+void silc_mutex_free(SilcMutex mutex)
+{
+#ifdef SILC_THREADS
+ if (mutex) {
+ DeleteCriticalSection(&mutex->mutex);
+ silc_free(mutex);
+ }
+#endif /* SILC_THREADS */
+}
+
+void silc_mutex_lock(SilcMutex mutex)
+{
+#ifdef SILC_THREADS
+ if (mutex) {
+ EnterCriticalSection(&mutex->mutex);
+ SILC_ASSERT(mutex->locked == FALSE);
+ mutex->locked = TRUE;
+ }
+#endif /* SILC_THREADS */
+}
+
+void silc_mutex_unlock(SilcMutex mutex)
+{
+#ifdef SILC_THREADS
+ if (mutex) {
+ SILC_ASSERT(mutex->locked == TRUE);
+ mutex->locked = FALSE;
+ LeaveCriticalSection(&mutex->mutex);
+ }
+#endif /* SILC_THREADS */
+}
+
+void silc_mutex_assert_locked(SilcMutex mutex)
+{
+#ifdef SILC_THREADS
+ if (mutex)
+ SILC_ASSERT(mutex->locked);
+#endif /* SILC_THREADS */
+}
+
+
+/***************************** SILC Rwlock API ******************************/
+
+/* SILC read/write lock structure */
+struct SilcRwLockStruct {
+#ifdef SILC_THREADS
+ SilcMutex mutex;
+ SilcCond cond;
+#endif /* SILC_THREADS */
+ unsigned int readers : 31;
+ unsigned int locked : 1;
+};
+
+SilcBool silc_rwlock_alloc(SilcRwLock *rwlock)
+{
+#ifdef SILC_THREADS
+ *rwlock = silc_calloc(1, sizeof(**rwlock));
+ if (!(*rwlock))
+ return FALSE;
+ if (!silc_mutex_alloc(&(*rwlock)->mutex)) {
+ silc_free(*rwlock);
+ return FALSE;
+ }
+ if (!silc_cond_alloc(&(*rwlock)->cond)) {
+ silc_mutex_free((*rwlock)->mutex);
+ silc_free(*rwlock);
+ return FALSE;
+ }
+ return TRUE;
+#else
+ return FALSE;
+#endif /* SILC_THREADS */
+}
+
+void silc_rwlock_free(SilcRwLock rwlock)
+{
+#ifdef SILC_THREADS
+ if (rwlock) {
+ silc_mutex_free(rwlock->mutex);
+ silc_cond_free(rwlock->cond);
+ silc_free(rwlock);
+ }
+#endif /* SILC_THREADS */
+}
+
+void silc_rwlock_rdlock(SilcRwLock rwlock)
+{
+#ifdef SILC_THREADS
+ if (rwlock) {
+ silc_mutex_lock(rwlock->mutex);
+ rwlock->readers++;
+ silc_mutex_unlock(rwlock->mutex);
+ }
+#endif /* SILC_THREADS */
+}
+
+void silc_rwlock_wrlock(SilcRwLock rwlock)
+{
+#ifdef SILC_THREADS
+ if (rwlock) {
+ silc_mutex_lock(rwlock->mutex);
+ while (rwlock->readers > 0)
+ silc_cond_wait(rwlock->cond, rwlock->mutex);
+ rwlock->locked = TRUE;
+ }
+#endif /* SILC_THREADS */
+}
+
+void silc_rwlock_unlock(SilcRwLock rwlock)
+{
+#ifdef SILC_THREADS
+ if (rwlock) {
+ if (rwlock->locked) {
+ /* Unlock writer */
+ rwlock->locked = FALSE;
+ silc_mutex_unlock(rwlock->mutex);
+ return;
+ }
+
+ /* Unlock reader */
+ silc_mutex_lock(rwlock->mutex);
+ rwlock->readers--;
+ silc_cond_broadcast(rwlock->cond);
+ silc_mutex_unlock(rwlock->mutex);
+ }
+#endif /* SILC_THREADS */
+}
+
+
+/**************************** SILC Cond API ******************************/
+
+/* SILC Conditional Variable context */
+struct SilcCondStruct {
+#ifdef SILC_THREADS
+ HANDLE event;
+#endif /* SILC_THREADS*/
+ unsigned int waiters : 23;
+ unsigned int signal : 1;
+};
+
+SilcBool silc_cond_alloc(SilcCond *cond)
+{
+#ifdef SILC_THREADS
+ *cond = silc_calloc(1, sizeof(**cond));
+ if (*cond == NULL)
+ return FALSE;
+ (*cond)->event = CreateEvent(NULL, TRUE, FALSE, NULL);
+ return TRUE;
+#else
+ return FALSE;
+#endif /* SILC_THREADS*/
+}
+
+void silc_cond_free(SilcCond cond)
+{
+#ifdef SILC_THREADS
+ CloseHandle(cond->event);
+ silc_free(cond);
+#endif /* SILC_THREADS*/
+}
+
+void silc_cond_signal(SilcCond cond)
+{
+#ifdef SILC_THREADS
+ cond->signal = TRUE;
+ SetEvent(cond->event);
+#endif /* SILC_THREADS*/
+}
+
+void silc_cond_broadcast(SilcCond cond)
+{
+#ifdef SILC_THREADS
+ cond->signal = TRUE;
+ SetEvent(cond->event);
+#endif /* SILC_THREADS*/
+}
+
+void silc_cond_wait(SilcCond cond, SilcMutex mutex)
+{
+#ifdef SILC_THREADS
+ silc_cond_timedwait(cond, mutex, 0);
+#endif /* SILC_THREADS*/
+}
+
+SilcBool silc_cond_timedwait(SilcCond cond, SilcMutex mutex,
+ int timeout)
+{
+#ifdef SILC_THREADS
+ DWORD ret, t = INFINITE;
+
+ if (timeout)
+ t = timeout;
+
+ while (TRUE) {
+ cond->waiters++;
+ silc_mutex_unlock(mutex);
+
+ ret = WaitForSingleObject(cond->event, t);
+
+ silc_mutex_lock(mutex);
+ cond->waiters--;
+
+ if (ret != WAIT_OBJECT_0)
+ return FALSE;
+
+ if (cond->signal) {
+ cond->signal = FALSE;
+ ResetEvent(cond->event);
+ break;
+ }
+ }
+#endif /* SILC_THREADS*/
+ return TRUE;
+}
projects / silc.git / blobdiff