system_wrappers: rename interface -> include

webrtc/system_wrappers/interface/rw_lock_wrapper.h

-/*
- *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef WEBRTC_SYSTEM_WRAPPERS_INTERFACE_RW_LOCK_WRAPPER_H_
-#define WEBRTC_SYSTEM_WRAPPERS_INTERFACE_RW_LOCK_WRAPPER_H_
-
-#include "webrtc/base/thread_annotations.h"
-
-// Note, Windows pre-Vista version of RW locks are not supported natively. For
-// these OSs regular critical sections have been used to approximate RW lock
-// functionality and will therefore have worse performance.
-
-namespace webrtc {
-
-class LOCKABLE RWLockWrapper {
- public:
-  static RWLockWrapper* CreateRWLock();
-  virtual ~RWLockWrapper() {}
-
-  virtual void AcquireLockExclusive() EXCLUSIVE_LOCK_FUNCTION() = 0;
-  virtual void ReleaseLockExclusive() UNLOCK_FUNCTION() = 0;
-
-  virtual void AcquireLockShared() SHARED_LOCK_FUNCTION() = 0;
-  virtual void ReleaseLockShared() UNLOCK_FUNCTION() = 0;
-};
-
-// RAII extensions of the RW lock. Prevents Acquire/Release missmatches and
-// provides more compact locking syntax.
-class SCOPED_LOCKABLE ReadLockScoped {
- public:
-  ReadLockScoped(RWLockWrapper& rw_lock) SHARED_LOCK_FUNCTION(rw_lock)
-      : rw_lock_(rw_lock) {
-    rw_lock_.AcquireLockShared();
-  }
-
-  ~ReadLockScoped() UNLOCK_FUNCTION() {
-    rw_lock_.ReleaseLockShared();
-  }
-
- private:
-  RWLockWrapper& rw_lock_;
-};
-
-class SCOPED_LOCKABLE WriteLockScoped {
- public:
-  WriteLockScoped(RWLockWrapper& rw_lock) EXCLUSIVE_LOCK_FUNCTION(rw_lock)
-      : rw_lock_(rw_lock) {
-    rw_lock_.AcquireLockExclusive();
-  }
-
-  ~WriteLockScoped() UNLOCK_FUNCTION() {
-    rw_lock_.ReleaseLockExclusive();
-  }
-
- private:
-  RWLockWrapper& rw_lock_;
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_SYSTEM_WRAPPERS_INTERFACE_RW_LOCK_WRAPPER_H_