artf4156: Replaced synchronization primitives with C++11 equivalents

Change-Id: I90da739347e875efda2a29dd5484b6dda3cd4753

hal/lib/Athena/cpp/priority_mutex.cpp

@@ -0,0 +1,33 @@
+#include "HAL/cpp/priority_mutex.h"
+
+void priority_recursive_mutex::lock() {
+  pthread_mutex_lock(&m_mutex);
+}
+
+void priority_recursive_mutex::unlock() {
+  pthread_mutex_unlock(&m_mutex);
+}
+
+bool priority_recursive_mutex::try_lock() noexcept {
+  return !pthread_mutex_trylock(&m_mutex);
+}
+
+pthread_mutex_t* priority_recursive_mutex::native_handle() {
+  return &m_mutex;
+}
+
+void priority_mutex::lock() {
+  pthread_mutex_lock(&m_mutex);
+}
+
+void priority_mutex::unlock() {
+  pthread_mutex_unlock(&m_mutex);
+}
+
+bool priority_mutex::try_lock() noexcept {
+  return !pthread_mutex_trylock(&m_mutex);
+}
+
+pthread_mutex_t* priority_mutex::native_handle() {
+  return &m_mutex;
+}