native_client_sdk/src/libraries/sdk_util/simple_lock.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef LIBRARIES_SDK_UTIL_SIMPLE_LOCK_H_
   6 #define LIBRARIES_SDK_UTIL_SIMPLE_LOCK_H_
   7
   8 #include "pthread.h"
   9 #include "sdk_util/macros.h"
  10
  11 namespace sdk_util {
  12
  13 /*
  14  * SimpleLock
  15  *
  16  * A pthread mutex object, with automatic initialization and destruction.
  17  * Should be used with AutoLock where possible.
  18  */
  19 class SimpleLock {
  20  public:
  21   SimpleLock() {
  22     pthread_mutex_init(&lock_, NULL);
  23   }
  24
  25   ~SimpleLock() {
  26     pthread_mutex_destroy(&lock_);
  27   }
  28
  29   void Lock() const   { pthread_mutex_lock(&lock_); }
  30   void Unlock() const { pthread_mutex_unlock(&lock_); }
  31
  32   pthread_mutex_t* mutex() const { return &lock_; }
  33
  34  private:
  35   mutable pthread_mutex_t lock_;
  36
  37   DISALLOW_COPY_AND_ASSIGN(SimpleLock);
  38 };
  39
  40 }  // namespace sdk_util
  41
  42 #endif  // LIBRARIES_SDK_UTIL_SIMPLE_LOCK_H_