updates.

[silc.git] / lib / silcutil / beos / silcbeosmutex.c

diff --git a/lib/silcutil/beos/silcbeosmutex.c b/lib/silcutil/beos/silcbeosmutex.c
new file mode 100644 (file)
index 0000000..7454492
--- /dev/null
+++ b/lib/silcutil/beos/silcbeosmutex.c
@@ -0,0 +1,73 @@
+/*
+
+  silcbeosmutex.c 
+
+  Author: Pekka Riikonen <priikone@silcnet.org>
+
+  Copyright (C) 2002 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
+  GNU General Public License for more details.
+
+*/
+/* $Id$ */
+
+#include "silcincludes.h"
+
+#ifdef SILC_THREADS
+
+/* SILC Mutex structure */
+struct SilcMutexStruct {
+  int sema_count;
+  sem_id sema;
+};
+
+bool silc_mutex_alloc(SilcMutex *mutex)
+{
+  int ret;
+
+  *mutex = silc_calloc(1, sizeof(**mutex));
+  if (*mutex == NULL)
+    return FALSE;
+
+  ret = create_sem(0, "SILC_MUTEX");
+  if (ret < B_NO_ERROR) {
+    silc_free(*mutex);
+    return FALSE;
+  }
+
+  (*mutex)->sema_count = 0;
+  (*mutex)->sema = ret;
+
+  return TRUE;
+}
+
+void silc_mutex_free(SilcMutex mutex)
+{
+  delete_sem(mutex->sema);
+  silc_free(mutex);
+}
+
+void silc_mutex_lock(SilcMutex mutex)
+{
+  if (atomic_add(&mutex->sema_count, 1) > 0) {
+    if (acquire_sem(mutex->sema) < B_NO_ERROR)
+      assert(FALSE);
+  }
+}
+
+void silc_mutex_unlock(SilcMutex mutex)
+{
+  if (atomic_add(&mutes->sema_count, -1) > 1) {
+    if (release_sem(mutex->sema) < B_NO_ERROR)
+      assert(FALSE);
+  }
+}
+
+#endif /* SILC_THREADS */