Merged in dstaesse/ouroboros/be-rw_lock (pull request #80)

lib: implementation of read/write locks

2 files changed, 42 insertions, 0 deletions

diff --git a/include/ouroboros/CMakeLists.txt b/include/ouroboros/CMakeLists.txt
index a42c65fd..f1276f51 100644
--- a/include/ouroboros/CMakeLists.txt
+++ b/include/ouroboros/CMakeLists.txt
@@ -16,6 +16,7 @@ set(HEADER_FILES
         irm.h
         list.h
         logs.h
+        rw_lock.h
         shm_ap_rbuff.h
         shm_du_map.h
         sockets.h
diff --git a/include/ouroboros/rw_lock.h b/include/ouroboros/rw_lock.h
new file mode 100644
index 00000000..03eee605
--- /dev/null
+++ b/include/ouroboros/rw_lock.h
@@ -0,0 +1,41 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Read/Write locks
+ *
+ *    Dimitri Staessens <[email protected]>
+ *
+ * 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.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef OUROBOROS_RWLOCK_H
+#define OUROBOROS_RWLOCK_H
+
+#include <ouroboros/config.h>
+#include <pthread.h>
+
+typedef struct rw_lock {
+        pthread_mutex_t lock;
+        pthread_mutex_t i_lock;
+        int             i;
+} rw_lock_t;
+
+int  rw_lock_init(rw_lock_t * lock);
+void rw_lock_destroy(rw_lock_t * lock);
+int  rw_lock_rdlock(rw_lock_t * lock);
+int  rw_lock_wrlock(rw_lock_t * lock);
+int  rw_lock_unlock(rw_lock_t * lock);
+
+#endif /* OUROBOROS_RWLOCK_H */