Index: base/synchronization/read_write_lock_nacl.cc |
diff --git a/base/synchronization/read_write_lock_nacl.cc b/base/synchronization/read_write_lock_nacl.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..7278b1f52cdee3f7b9a8a7d1666923f8c214409f |
--- /dev/null |
+++ b/base/synchronization/read_write_lock_nacl.cc |
@@ -0,0 +1,49 @@ |
+// Copyright 2016 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "base/synchronization/read_write_lock.h" |
+ |
+#include "base/logging.h" |
+ |
+namespace base { |
+namespace subtle { |
+ |
+ReadWriteLock::ReadWriteLock() {} |
+ |
+ReadWriteLock::~ReadWriteLock() { |
+ DCHECK_EQ(0u, readers_); |
+ int result = pthread_mutex_destroy(&writer_lock_); |
+ DCHECK_EQ(result, 0) << ". " << strerror(result); |
+} |
+ |
+void ReadWriteLock::ReadAcquire() { |
+ AutoLock hold(native_handle_); |
+ readers_++; |
+ if (readers_ == 1) { |
+ int result = pthread_mutex_lock(&writer_lock_); |
+ DCHECK_EQ(result, 0) << ". " << strerror(result); |
+ } |
+} |
+ |
+void ReadWriteLock::ReadRelease() { |
+ AutoLock hold(native_handle_); |
+ readers_--; |
+ if (readers_ == 0) { |
+ int result = pthread_mutex_unlock(&writer_lock_); |
+ DCHECK_EQ(result, 0) << ". " << strerror(result); |
+ } |
+} |
+ |
+void ReadWriteLock::WriteAcquire() { |
+ int result = pthread_mutex_lock(&writer_lock_); |
+ DCHECK_EQ(result, 0) << ". " << strerror(result); |
+} |
+ |
+void ReadWriteLock::WriteRelease() { |
+ int result = pthread_mutex_unlock(&writer_lock_); |
+ DCHECK_EQ(result, 0) << ". " << strerror(result); |
+} |
+ |
+} // namespace subtle |
+} // namespace base |