You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
1.1 KiB
41 lines
1.1 KiB
// Copyright (c) 2011 The LevelDB Authors. All rights reserved. |
|
// Use of this source code is governed by a BSD-style license that can be |
|
// found in the LICENSE file. See the AUTHORS file for names of contributors. |
|
|
|
#ifndef STORAGE_LEVELDB_UTIL_MUTEXLOCK_H_ |
|
#define STORAGE_LEVELDB_UTIL_MUTEXLOCK_H_ |
|
|
|
#include "port/port.h" |
|
#include "port/thread_annotations.h" |
|
|
|
namespace leveldb { |
|
|
|
// Helper class that locks a mutex on construction and unlocks the mutex when |
|
// the destructor of the MutexLock object is invoked. |
|
// |
|
// Typical usage: |
|
// |
|
// void MyClass::MyMethod() { |
|
// MutexLock l(&mu_); // mu_ is an instance variable |
|
// ... some complex code, possibly with multiple return paths ... |
|
// } |
|
|
|
class SCOPED_LOCKABLE MutexLock { |
|
public: |
|
explicit MutexLock(port::Mutex *mu) EXCLUSIVE_LOCK_FUNCTION(mu) |
|
: mu_(mu) { |
|
this->mu_->Lock(); |
|
} |
|
~MutexLock() UNLOCK_FUNCTION() { this->mu_->Unlock(); } |
|
|
|
private: |
|
port::Mutex *const mu_; |
|
// No copying allowed |
|
MutexLock(const MutexLock&); |
|
void operator=(const MutexLock&); |
|
}; |
|
|
|
} // namespace leveldb |
|
|
|
|
|
#endif // STORAGE_LEVELDB_UTIL_MUTEXLOCK_H_
|
|
|