The Tor Browser / file comparison
comparison: security/sandbox/chromium/base/synchronization/lock_impl.h
security/sandbox/chromium/base/synchronization/lock_impl.h
- branch
- TOR_BUG_9701
- changeset 3
- 141e0f1194b1
equal
deleted
inserted
replaced
| -1:000000000000 | 0:e6c3ad039618 |
|---|---|
| 1 // Copyright (c) 2011 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 BASE_SYNCHRONIZATION_LOCK_IMPL_H_ | |
| 6 #define BASE_SYNCHRONIZATION_LOCK_IMPL_H_ | |
| 7 | |
| 8 #include "build/build_config.h" | |
| 9 | |
| 10 #if defined(OS_WIN) | |
| 11 #include <windows.h> | |
| 12 #elif defined(OS_POSIX) | |
| 13 #include <pthread.h> | |
| 14 #endif | |
| 15 | |
| 16 #include "base/base_export.h" | |
| 17 #include "base/basictypes.h" | |
| 18 | |
| 19 namespace base { | |
| 20 namespace internal { | |
| 21 | |
| 22 // This class implements the underlying platform-specific spin-lock mechanism | |
| 23 // used for the Lock class. Most users should not use LockImpl directly, but | |
| 24 // should instead use Lock. | |
| 25 class BASE_EXPORT LockImpl { | |
| 26 public: | |
| 27 #if defined(OS_WIN) | |
| 28 typedef CRITICAL_SECTION NativeHandle; | |
| 29 #elif defined(OS_POSIX) | |
| 30 typedef pthread_mutex_t NativeHandle; | |
| 31 #endif | |
| 32 | |
| 33 LockImpl(); | |
| 34 ~LockImpl(); | |
| 35 | |
| 36 // If the lock is not held, take it and return true. If the lock is already | |
| 37 // held by something else, immediately return false. | |
| 38 bool Try(); | |
| 39 | |
| 40 // Take the lock, blocking until it is available if necessary. | |
| 41 void Lock(); | |
| 42 | |
| 43 // Release the lock. This must only be called by the lock's holder: after | |
| 44 // a successful call to Try, or a call to Lock. | |
| 45 void Unlock(); | |
| 46 | |
| 47 // Return the native underlying lock. | |
| 48 // TODO(awalker): refactor lock and condition variables so that this is | |
| 49 // unnecessary. | |
| 50 NativeHandle* native_handle() { return &native_handle_; } | |
| 51 | |
| 52 private: | |
| 53 NativeHandle native_handle_; | |
| 54 | |
| 55 DISALLOW_COPY_AND_ASSIGN(LockImpl); | |
| 56 }; | |
| 57 | |
| 58 } // namespace internal | |
| 59 } // namespace base | |
| 60 | |
| 61 #endif // BASE_SYNCHRONIZATION_LOCK_IMPL_H_ |
