1/*
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
17#ifndef BCC_SUPPORT_FILE_MUTEX_H
18#define BCC_SUPPORT_FILE_MUTEX_H
19
20#include <string>
21
22#include "bcc/Support/FileBase.h"
23
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
43#endif  // BCC_SUPPORT_FILE_MUTEX_H
44