mutex.h

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#ifndef ION_PORT_MUTEX_H_
#define ION_PORT_MUTEX_H_

#if defined(ION_PLATFORM_WINDOWS)
#  include <windows.h>
#else
#  include <pthread.h>
#endif

#include "base/macros.h"

namespace ion {
namespace port {

class ION_API Mutex {
 public:
  Mutex();
  ~Mutex();

  bool IsLocked();
  void Lock();
  bool TryLock();
  void Unlock();

 private:
#if defined(ION_PLATFORM_WINDOWS)
  CRITICAL_SECTION critical_section_;
  LONG blockers_;
  HANDLE event_;
  DWORD thread_id_;
#elif defined(ION_PLATFORM_ASMJS)
  bool locked_;
#else
  pthread_mutex_t pthread_mutex_;
#endif

  DISALLOW_COPY_AND_ASSIGN(Mutex);
};

}  // namespace port
}  // namespace ion

#endif  // ION_PORT_MUTEX_H_