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| 1 // Copyright (c) 2012 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 #include "ppapi/utility/threading/lock.h" |
| 6 |
| 7 namespace pp { |
| 8 |
| 9 #ifdef WIN32 // Windows implementation for native plugins. |
| 10 |
| 11 Lock::Lock() { |
| 12 // The second parameter is the spin count, for short-held locks it avoid the |
| 13 // contending thread from going to sleep which helps performance greatly. |
| 14 ::InitializeCriticalSectionAndSpinCount(&os_lock_, 2000); |
| 15 } |
| 16 |
| 17 Lock::~Lock() { |
| 18 ::DeleteCriticalSection(&os_lock_); |
| 19 } |
| 20 |
| 21 void Lock::Acquire() { |
| 22 ::EnterCriticalSection(&os_lock_); |
| 23 } |
| 24 |
| 25 void Lock::Release() { |
| 26 ::LeaveCriticalSection(&os_lock_); |
| 27 } |
| 28 |
| 29 #else // Posix implementation. |
| 30 |
| 31 Lock::Lock() { |
| 32 pthread_mutex_init(&os_lock_, NULL); |
| 33 } |
| 34 |
| 35 Lock::~Lock() { |
| 36 pthread_mutex_destroy(&os_lock_); |
| 37 } |
| 38 |
| 39 void Lock::Acquire() { |
| 40 pthread_mutex_lock(&os_lock_); |
| 41 } |
| 42 |
| 43 void Lock::Release() { |
| 44 pthread_mutex_unlock(&os_lock_); |
| 45 } |
| 46 |
| 47 #endif |
| 48 |
| 49 } // namespace pp |
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