| #ifndef _sys_PidFile_h |
| #define _sys_PidFile_h |
| |
| /* |
| * |
| * Copyright (c) 2008 The Apache Software Foundation |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include "qpid/sys/LockFile.h" |
| |
| #include "qpid/CommonImportExport.h" |
| #include "qpid/sys/IntegerTypes.h" |
| |
| #include <boost/noncopyable.hpp> |
| #include <boost/shared_ptr.hpp> |
| #include <string> |
| |
| namespace qpid { |
| namespace sys { |
| |
| class QPID_COMMON_CLASS_EXTERN PidFile : public LockFile |
| { |
| public: |
| QPID_COMMON_EXTERN PidFile(const std::string& path_, bool create); |
| |
| /** |
| * Read the process ID from the lock file. This method assumes that |
| * if there is a process ID in the file, it was written there by |
| * writePid(); thus, it's at the start of the file. |
| * |
| * Throws an exception if there is an error reading the file. |
| * |
| * @returns The stored process ID. No validity check is done on it. |
| */ |
| QPID_COMMON_EXTERN pid_t readPid(void) const; |
| |
| /** |
| * Write the current process's ID to the lock file. It's written at |
| * the start of the file and will overwrite any other content that |
| * may be in the file. |
| * |
| * Throws an exception if the write fails. |
| */ |
| QPID_COMMON_EXTERN void writePid(void); |
| }; |
| |
| }} /* namespace qpid::sys */ |
| |
| #endif /*!_sys_PidFile_h*/ |