mirror of https://gitee.com/bigwinds/arangodb
105 lines
3.5 KiB
C++
105 lines
3.5 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// @brief write locker
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2010-2011 triagens GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is triAGENS GmbH, Cologne, Germany
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///
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/// @author Frank Celler
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/// @author Achim Brandt
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/// @author Copyright 2010-2011, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#ifndef TRIAGENS_BASICS_WRITE_LOCKER_H
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#define TRIAGENS_BASICS_WRITE_LOCKER_H 1
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#include <Basics/Common.h>
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#include <Basics/ReadWriteLock.h>
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////////////////////////////////////////////////////////////////////////////////
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/// @brief construct locker with file and line information
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////////////////////////////////////////////////////////////////////////////////
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#define WRITE_LOCKER_VAR_A(a) _write_lock_variable ## a
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#define WRITE_LOCKER_VAR_B(a) WRITE_LOCKER_VAR_A(a)
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#define WRITE_LOCKER(b) \
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triagens::basics::WriteLocker WRITE_LOCKER_VAR_B(__LINE__)(&b, __FILE__, __LINE__)
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namespace triagens {
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namespace basics {
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////////////////////////////////////////////////////////////////////////////////
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/// @ingroup Threads
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/// @brief write locker
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///
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/// A WriteLocker write-locks a read-write lock during its lifetime and unlocks
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/// the lock when it is destroyed.
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////////////////////////////////////////////////////////////////////////////////
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class WriteLocker {
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private:
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WriteLocker (WriteLocker const&);
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WriteLocker& operator= (WriteLocker const&);
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public:
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////////////////////////////////////////////////////////////////////////////////
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/// @brief aquires a write-lock
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///
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/// The constructors aquires a write lock, the destructors unlocks the lock.
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///
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/// @param[in]
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/// readWriteLock read-write lock
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////////////////////////////////////////////////////////////////////////////////
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explicit
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WriteLocker (ReadWriteLock* readWriteLock);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief aquires a write-lock
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///
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/// The constructors aquires a write lock, the destructors unlocks the lock.
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///
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/// @param[in]
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/// readWriteLock read-write lock
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/// file [in] file
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/// line [in] line number
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////////////////////////////////////////////////////////////////////////////////
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explicit
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WriteLocker (ReadWriteLock* readWriteLock, char const* file, int line);
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////////////////////////////////////////////////////////////////////////////////
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/// @brief releases the write-lock
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////////////////////////////////////////////////////////////////////////////////
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~WriteLocker ();
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private:
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ReadWriteLock* _readWriteLock;
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char const* _file;
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int _line;
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};
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}
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}
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#endif
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