artf4156: Replaced synchronization primitives with C++11 equivalents

Change-Id: I90da739347e875efda2a29dd5484b6dda3cd4753

hal/include/HAL/cpp/priority_mutex.h

@@ -0,0 +1,67 @@
+#pragma once
+
+#include <pthread.h>
+
+// Allows usage with std::unique_lock without including <mutex> separately
+#include <mutex>
+
+class priority_recursive_mutex {
+ public:
+  typedef pthread_mutex_t *native_handle_type;
+
+  constexpr priority_recursive_mutex() noexcept = default;
+  priority_recursive_mutex(const priority_recursive_mutex &) = delete;
+  priority_recursive_mutex &operator=(const priority_recursive_mutex &) = delete;
+
+  // Lock the mutex, blocking until it's available.
+  void lock();
+
+  // Unlock the mutex.
+  void unlock();
+
+  // Tries to lock the mutex.
+  bool try_lock() noexcept;
+
+  pthread_mutex_t *native_handle();
+
+ private:
+  // Do the equivalent of setting PTHREAD_PRIO_INHERIT and
+  // PTHREAD_MUTEX_RECURSIVE_NP.
+#if __WORDSIZE == 64
+  pthread_mutex_t m_mutex = {
+      {0, 0, 0, 0, 0x20 | PTHREAD_MUTEX_RECURSIVE_NP, 0, 0, {0, 0}}};
+#else
+  pthread_mutex_t m_mutex = {
+      {0, 0, 0, 0x20 | PTHREAD_MUTEX_RECURSIVE_NP, 0, {0}}};
+#endif
+};
+
+class priority_mutex {
+ public:
+  typedef pthread_mutex_t *native_handle_type;
+
+  constexpr priority_mutex() noexcept = default;
+  priority_mutex(const priority_mutex &) = delete;
+  priority_mutex &operator=(const priority_mutex &) = delete;
+
+  // Lock the mutex, blocking until it's available.
+  void lock();
+
+  // Unlock the mutex.
+  void unlock();
+
+  // Tries to lock the mutex.
+  bool try_lock() noexcept;
+
+  pthread_mutex_t *native_handle();
+
+ private:
+  // Do the equivalent of setting PTHREAD_PRIO_INHERIT.
+#if __WORDSIZE == 64
+  pthread_mutex_t m_mutex = {
+      {0, 0, 0, 0, 0x20, 0, 0, {0, 0}}};
+#else
+  pthread_mutex_t m_mutex = {
+      {0, 0, 0, 0x20, 0, {0}}};
+#endif
+};