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Zonr Changd670be72012-04-05 15:09:28 +08001/*
2 * Copyright 2012, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
Stephen Hines2f6a4932012-05-03 12:27:13 -070017#ifndef BCC_EXECUTION_ENGINE_FILE_MUTEX_H
18#define BCC_EXECUTION_ENGINE_FILE_MUTEX_H
Zonr Changd670be72012-04-05 15:09:28 +080019
20#include <string>
21
Stephen Hines2f6a4932012-05-03 12:27:13 -070022#include "FileBase.h"
Zonr Changd670be72012-04-05 15:09:28 +080023
24namespace bcc {
25
26template<enum FileBase::LockModeEnum LockMode>
27class FileMutex : public FileBase {
28public:
29 FileMutex(const std::string &pFileToLock)
30 : FileBase(pFileToLock + ".lock", O_RDONLY | O_CREAT, 0) { }
31
32 // Provide a lock() interface filled with default configuration.
33 inline bool lock(bool pNonblocking = true,
34 unsigned pMaxRetry = FileBase::kDefaultMaxRetryLock,
35 useconds_t pRetryInterval =
36 FileBase::kDefaultRetryLockInterval) {
37 return FileBase::lock(LockMode, pNonblocking, pMaxRetry, pRetryInterval);
38 }
39};
40
41} // namespace bcc
42
Stephen Hines2f6a4932012-05-03 12:27:13 -070043#endif // BCC_EXECUTION_ENGINE_FILE_MUTEX_H