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Diffstat (limited to 'qpid/cpp/src/qpid/sys/posix/Fork.h')
-rw-r--r-- | qpid/cpp/src/qpid/sys/posix/Fork.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/sys/posix/Fork.h b/qpid/cpp/src/qpid/sys/posix/Fork.h new file mode 100644 index 0000000000..698c61ed30 --- /dev/null +++ b/qpid/cpp/src/qpid/sys/posix/Fork.h @@ -0,0 +1,82 @@ +#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> + +namespace qpid { +namespace sys { + +/** + * Fork the process. Call parent() in parent and child() in child. + */ +class 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*/ |