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      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_
     43