| #ifndef QPID_SYS_POSIX_FORK_H |
| #define QPID_SYS_POSIX_FORK_H |
| |
| /* |
| * |
| * Copyright (c) 2006 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 <string> |
| #include <sys/types.h> |
| #include "qpid/CommonImportExport.h" |
| |
| namespace qpid { |
| namespace sys { |
| |
| /** |
| * Fork the process. Call parent() in parent and child() in child. |
| */ |
| class QPID_COMMON_CLASS_EXTERN Fork { |
| public: |
| Fork(); |
| virtual ~Fork(); |
| |
| /** |
| * Fork the process. |
| * Calls parent() in the parent process, child() in the child. |
| */ |
| virtual void fork(); |
| |
| protected: |
| |
| /** Called in parent process. |
| *@child pid of child process |
| */ |
| virtual void parent(pid_t child) = 0; |
| |
| /** Called in child process */ |
| virtual void child() = 0; |
| }; |
| |
| /** |
| * Like Fork but also allows the child to send a string message |
| * or throw an exception to the parent. |
| */ |
| class ForkWithMessage : public Fork { |
| public: |
| ForkWithMessage(); |
| void fork(); |
| |
| protected: |
| /** Call from parent(): wait for child to send a value or throw exception. |
| * @timeout in seconds to wait for response. |
| * @return value passed by child to ready(). |
| */ |
| std::string wait(int timeout); |
| |
| /** Call from child(): Send a value to the parent. |
| *@param value returned by parent call to wait(). |
| */ |
| void ready(const std::string& value); |
| |
| private: |
| int pipeFds[2]; |
| }; |
| |
| }} // namespace qpid::sys |
| |
| |
| |
| #endif /*!QPID_SYS_POSIX_FORK_H*/ |