Added SILC Thread Queue API

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

diff --git a/lib/silcutil/unix/silcunixthread.c b/lib/silcutil/unix/silcunixthread.c
index 6e85dd743981702723a8f34e7a006d3eb8ef73d4..1f13f6190035fb21786fd543a7e5c1fb695993ea 100644 (file)
--- a/lib/silcutil/unix/silcunixthread.c
+++ b/lib/silcutil/unix/silcunixthread.c
@@ -22,10 +22,29 @@
 
 /**************************** SILC Thread API *******************************/
 
+typedef struct {
+  SilcThreadStart start_func;
+  void *context;
+} *SilcThreadStartContext;
+
+static void *silc_thread_start(void *context)
+{
+  SilcThreadStartContext c = context;
+  SilcThreadStart start_func = c->start_func;
+  void *start_context = c->context;
+
+  silc_free(c);
+
+  silc_thread_tls_init();
+
+  return start_func(start_context);
+}
+
 SilcThread silc_thread_create(SilcThreadStart start_func, void *context,
                              SilcBool waitable)
 {
 #ifdef SILC_THREADS
+  SilcThreadStartContext c;
   pthread_attr_t attr;
   pthread_t thread;
   int ret;
@@ -35,24 +54,35 @@ SilcThread silc_thread_create(SilcThreadStart start_func, void *context,
   if (!start_func)
     return NULL;
 
+  c = silc_calloc(1, sizeof(*c));
+  if (!c)
+    return NULL;
+  c->start_func = start_func;
+  c->context = context;
+
   if (pthread_attr_init(&attr)) {
-    SILC_LOG_ERROR(("Thread error: %s", strerror(errno)));
+    silc_set_errno_posix(errno);
+    SILC_LOG_ERROR(("Thread error: %s", silc_errno_string(silc_errno)));
+    silc_free(c);
     return NULL;
   }
 
   if (pthread_attr_setdetachstate(&attr,
                                  waitable ? PTHREAD_CREATE_JOINABLE :
                                  PTHREAD_CREATE_DETACHED)) {
-    SILC_LOG_ERROR(("Thread error: %s", strerror(errno)));
+    silc_set_errno_posix(errno);
+    SILC_LOG_ERROR(("Thread error: %s", silc_errno_string(silc_errno)));
     pthread_attr_destroy(&attr);
+    silc_free(c);
     return NULL;
   }
 
-  ret = pthread_create(&thread, &attr, (void * (*)(void *))start_func,
-                      context);
+  ret = pthread_create(&thread, &attr, silc_thread_start, c);
   if (ret) {
-    SILC_LOG_ERROR(("Thread error: %s", strerror(errno)));
+    silc_set_errno_posix(errno);
+    SILC_LOG_ERROR(("Thread error: %s", silc_errno_string(silc_errno)));
     pthread_attr_destroy(&attr);
+    silc_free(c);
     return NULL;
   }
 
@@ -97,6 +127,14 @@ SilcBool silc_thread_wait(SilcThread thread, void **exit_value)
 #endif
 }
 
+void silc_thread_yield(void)
+{
+#ifdef SILC_THREADS
+#ifdef HAVE_SCHED_YIELD
+  sched_yield();
+#endif /* HAVE_SCHED_YIELD */
+#endif /* SILC_THREADS */
+}
 
 /***************************** SILC Mutex API *******************************/
 
@@ -114,7 +152,11 @@ SilcBool silc_mutex_alloc(SilcMutex *mutex)
   *mutex = silc_calloc(1, sizeof(**mutex));
   if (*mutex == NULL)
     return FALSE;
-  pthread_mutex_init(&(*mutex)->mutex, NULL);
+  if (pthread_mutex_init(&(*mutex)->mutex, NULL)) {
+    silc_set_errno_posix(errno);
+    silc_free(*mutex);
+    return FALSE;
+  }
   (*mutex)->locked = FALSE;
   return TRUE;
 #else
@@ -136,8 +178,7 @@ void silc_mutex_lock(SilcMutex mutex)
 {
 #ifdef SILC_THREADS
   if (mutex) {
-    if (pthread_mutex_lock(&mutex->mutex))
-      SILC_ASSERT(FALSE);
+    SILC_VERIFY(pthread_mutex_lock(&mutex->mutex) == 0);
     mutex->locked = TRUE;
   }
 #endif /* SILC_THREADS */
@@ -147,9 +188,8 @@ void silc_mutex_unlock(SilcMutex mutex)
 {
 #ifdef SILC_THREADS
   if (mutex) {
-    if (pthread_mutex_unlock(&mutex->mutex))
-      SILC_ASSERT(FALSE);
     mutex->locked = FALSE;
+    SILC_VERIFY(pthread_mutex_unlock(&mutex->mutex) == 0);
   }
 #endif /* SILC_THREADS */
 }
@@ -158,7 +198,7 @@ void silc_mutex_assert_locked(SilcMutex mutex)
 {
 #ifdef SILC_THREADS
   if (mutex)
-    SILC_ASSERT(mutex->locked);
+    SILC_VERIFY(mutex->locked);
 #endif /* SILC_THREADS */
 }
 
@@ -179,7 +219,11 @@ SilcBool silc_rwlock_alloc(SilcRwLock *rwlock)
   *rwlock = silc_calloc(1, sizeof(**rwlock));
   if (*rwlock == NULL)
     return FALSE;
-  pthread_rwlock_init(&(*rwlock)->rwlock, NULL);
+  if (pthread_rwlock_init(&(*rwlock)->rwlock, NULL)) {
+    silc_set_errno_posix(errno);
+    silc_free(*rwlock);
+    return FALSE;
+  }
   return TRUE;
 #else
   return FALSE;
@@ -208,7 +252,7 @@ void silc_rwlock_wrlock(SilcRwLock rwlock)
 {
 #ifdef SILC_THREADS
   if (rwlock)
-    pthread_rwlock_wrlock(&rwlock->rwlock);
+    SILC_VERIFY(pthread_rwlock_wrlock(&rwlock->rwlock) == 0);
 #endif /* SILC_THREADS */
 }
 
@@ -216,7 +260,7 @@ void silc_rwlock_unlock(SilcRwLock rwlock)
 {
 #ifdef SILC_THREADS
   if (rwlock)
-    pthread_rwlock_unlock(&rwlock->rwlock);
+    SILC_VERIFY(pthread_rwlock_unlock(&rwlock->rwlock) == 0);
 #endif /* SILC_THREADS */
 }
 
@@ -237,7 +281,11 @@ SilcBool silc_cond_alloc(SilcCond *cond)
   *cond = silc_calloc(1, sizeof(**cond));
   if (*cond == NULL)
     return FALSE;
-  pthread_cond_init(&(*cond)->cond, NULL);
+  if (pthread_cond_init(&(*cond)->cond, NULL)) {
+    silc_set_errno_posix(errno);
+    silc_free(*cond);
+    return FALSE;
+  }
   return TRUE;
 #else
   return FALSE;
@@ -289,3 +337,69 @@ SilcBool silc_cond_timedwait(SilcCond cond, SilcMutex mutex,
   return FALSE;
 #endif /* SILC_THREADS*/
 }
+
+/************************** Thread-local Storage ****************************/
+
+#if (defined(SILC_THREADS) && defined(HAVE_PTHREAD_KEY_CREATE) && \
+     defined(HAVE_PTHREAD_ONCE))
+
+static pthread_key_t key;
+static pthread_once_t key_once = PTHREAD_ONCE_INIT;
+
+static void silc_thread_tls_destructor(void *context)
+{
+  silc_free(context);
+}
+
+static void silc_thread_tls_alloc(void)
+{
+  if (pthread_key_create(&key, silc_thread_tls_destructor))
+    SILC_LOG_ERROR(("Error creating Thread-local storage"));
+}
+
+SilcTls silc_thread_tls_init(void)
+{
+  SilcTls tls;
+
+  pthread_once(&key_once, silc_thread_tls_alloc);
+
+  if (silc_thread_get_tls())
+    return silc_thread_get_tls();
+
+  /* Allocate Tls for the thread */
+  tls = silc_calloc(1, sizeof(*tls));
+  if (!tls) {
+    SILC_LOG_ERROR(("Error allocating Thread-local storage"));
+    return NULL;
+  }
+
+  pthread_setspecific(key, tls);
+  return tls;
+}
+
+SilcTls silc_thread_get_tls(void)
+{
+  return pthread_getspecific(key);
+}
+
+#else
+
+SilcTlsStruct tls;
+SilcTls tls_ptr = NULL;
+
+SilcTls silc_thread_tls_init(void)
+{
+  if (silc_thread_get_tls())
+    return silc_thread_get_tls();
+
+  tls_ptr = &tls;
+  memset(tls_ptr, 0, sizeof(*tls_ptr));
+  return tls_ptr;
+}
+
+SilcTls silc_thread_get_tls(void)
+{
+  return tls_ptr;
+}
+
+#endif