1 files changed, 126 insertions, 0 deletions
diff --git a/SDL_Core/src/components/Utils/src/lock_posix.cc b/SDL_Core/src/components/Utils/src/lock_posix.cc
new file mode 100644
index 000000000..be292f3e6
--- /dev/null
+++ b/SDL_Core/src/components/Utils/src/lock_posix.cc
@@ -0,0 +1,126 @@
+/**
+ * Copyright (c) 2013, Ford Motor Company
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * Neither the name of the Ford Motor Company nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "utils/lock.h"
+
+#include <errno.h>
+
+#include "utils/logger.h"
+
+namespace {
+log4cxx::LoggerPtr g_logger =
+    log4cxx::LoggerPtr(log4cxx::Logger::getLogger("Utils"));
+}
+
+namespace sync_primitives {
+
+Lock::Lock()
+#ifndef NDEBUG
+      : lock_taken_(false)
+#endif // NDEBUG
+{
+  int32_t status = pthread_mutex_init(&mutex_, NULL);
+  if (status != 0) {
+    LOG4CXX_ERROR(g_logger, "Failed to initialize mutex");
+  }
+}
+
+Lock::~Lock() {
+#ifndef NDEBUG
+  if (lock_taken_) {
+    LOG4CXX_ERROR(g_logger, "Destroying non-released mutex");
+  }
+#endif
+  int32_t status = pthread_mutex_destroy(&mutex_);
+  if (status != 0) {
+    LOG4CXX_ERROR(g_logger, "Failed to destroy mutex");
+  }
+}
+
+void Lock::Ackquire() {
+  int32_t status = pthread_mutex_lock(&mutex_);
+  if (status != 0) {
+    LOG4CXX_ERROR(g_logger, "Failed to acquire mutex");
+  }
+  AssertFreeAndMarkTaken();
+}
+
+void Lock::Release() {
+  AssertTakenAndMarkFree();
+  int32_t status = pthread_mutex_unlock(&mutex_);
+  if (status != 0) {
+    LOG4CXX_ERROR(g_logger, "Failed to unlock mutex");
+  }
+}
+
+bool Lock::Try() {
+  bool ackquired = false;
+#ifndef NDEBUG
+  if (lock_taken_) {
+    LOG4CXX_ERROR(g_logger, "Trying to lock already taken mutex");
+  }
+#endif
+  switch(pthread_mutex_trylock(&mutex_)) {
+    case 0: {
+      ackquired = true;
+#ifndef NDEBUG
+      lock_taken_ = true;
+#endif
+    } break;
+    case EBUSY: {
+      ackquired = false;
+    } break;
+    default: {
+      ackquired = false;
+      LOG4CXX_ERROR(g_logger, "Failed to try lock the mutex");
+    }
+  }
+  return ackquired;
+}
+
+#ifndef NDEBUG
+void Lock::AssertFreeAndMarkTaken() {
+  if (lock_taken_) {
+    LOG4CXX_ERROR(g_logger, "Locking already taken mutex");
+  }
+  lock_taken_ = true;
+}
+void Lock::AssertTakenAndMarkFree() {
+  if (!lock_taken_) {
+    LOG4CXX_ERROR(g_logger, "Unlocking a mutex that is not taken");
+  }
+  lock_taken_ = false;
+}
+#endif
+
+
+} // namespace sync_primitives