14f94c520f8d699a5973956a1716272146be17128Zonr Chang/* 24f94c520f8d699a5973956a1716272146be17128Zonr Chang * Copyright 2012, The Android Open Source Project 34f94c520f8d699a5973956a1716272146be17128Zonr Chang * 44f94c520f8d699a5973956a1716272146be17128Zonr Chang * Licensed under the Apache License, Version 2.0 (the "License"); 54f94c520f8d699a5973956a1716272146be17128Zonr Chang * you may not use this file except in compliance with the License. 64f94c520f8d699a5973956a1716272146be17128Zonr Chang * You may obtain a copy of the License at 74f94c520f8d699a5973956a1716272146be17128Zonr Chang * 84f94c520f8d699a5973956a1716272146be17128Zonr Chang * http://www.apache.org/licenses/LICENSE-2.0 94f94c520f8d699a5973956a1716272146be17128Zonr Chang * 104f94c520f8d699a5973956a1716272146be17128Zonr Chang * Unless required by applicable law or agreed to in writing, software 114f94c520f8d699a5973956a1716272146be17128Zonr Chang * distributed under the License is distributed on an "AS IS" BASIS, 124f94c520f8d699a5973956a1716272146be17128Zonr Chang * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 134f94c520f8d699a5973956a1716272146be17128Zonr Chang * See the License for the specific language governing permissions and 144f94c520f8d699a5973956a1716272146be17128Zonr Chang * limitations under the License. 154f94c520f8d699a5973956a1716272146be17128Zonr Chang */ 164f94c520f8d699a5973956a1716272146be17128Zonr Chang 17c72c4ddfcd79c74f70713da91a69569451b5c19eZonr Chang#ifndef BCC_SUPPORT_FILE_MUTEX_H 18c72c4ddfcd79c74f70713da91a69569451b5c19eZonr Chang#define BCC_SUPPORT_FILE_MUTEX_H 194f94c520f8d699a5973956a1716272146be17128Zonr Chang 204f94c520f8d699a5973956a1716272146be17128Zonr Chang#include <string> 214f94c520f8d699a5973956a1716272146be17128Zonr Chang 22c72c4ddfcd79c74f70713da91a69569451b5c19eZonr Chang#include "bcc/Support/FileBase.h" 234f94c520f8d699a5973956a1716272146be17128Zonr Chang 244f94c520f8d699a5973956a1716272146be17128Zonr Changnamespace bcc { 254f94c520f8d699a5973956a1716272146be17128Zonr Chang 264f94c520f8d699a5973956a1716272146be17128Zonr Changtemplate<enum FileBase::LockModeEnum LockMode> 274f94c520f8d699a5973956a1716272146be17128Zonr Changclass FileMutex : public FileBase { 284f94c520f8d699a5973956a1716272146be17128Zonr Changpublic: 294f94c520f8d699a5973956a1716272146be17128Zonr Chang FileMutex(const std::string &pFileToLock) 30331310e1f3f86a795f78e42b3f03558a43829f09Stephen Hines : FileBase(pFileToLock + ".lock", O_RDONLY | O_CREAT, kDeleteOnClose) { } 314f94c520f8d699a5973956a1716272146be17128Zonr Chang 324f94c520f8d699a5973956a1716272146be17128Zonr Chang // Provide a lock() interface filled with default configuration. 334f94c520f8d699a5973956a1716272146be17128Zonr Chang inline bool lock(bool pNonblocking = true, 344f94c520f8d699a5973956a1716272146be17128Zonr Chang unsigned pMaxRetry = FileBase::kDefaultMaxRetryLock, 354f94c520f8d699a5973956a1716272146be17128Zonr Chang useconds_t pRetryInterval = 364f94c520f8d699a5973956a1716272146be17128Zonr Chang FileBase::kDefaultRetryLockInterval) { 374f94c520f8d699a5973956a1716272146be17128Zonr Chang return FileBase::lock(LockMode, pNonblocking, pMaxRetry, pRetryInterval); 384f94c520f8d699a5973956a1716272146be17128Zonr Chang } 394f94c520f8d699a5973956a1716272146be17128Zonr Chang}; 404f94c520f8d699a5973956a1716272146be17128Zonr Chang 414f94c520f8d699a5973956a1716272146be17128Zonr Chang} // namespace bcc 424f94c520f8d699a5973956a1716272146be17128Zonr Chang 43c72c4ddfcd79c74f70713da91a69569451b5c19eZonr Chang#endif // BCC_SUPPORT_FILE_MUTEX_H 44