| // Copyright 2010-2015, Google Inc. |
| // All rights reserved. |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following disclaimer |
| // in the documentation and/or other materials provided with the |
| // distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef MOZC_IPC_PROCESS_WATCH_DOG_H_ |
| #define MOZC_IPC_PROCESS_WATCH_DOG_H_ |
| |
| #ifndef OS_WIN |
| #include <sys/types.h> |
| #endif // !OS_WIN |
| |
| #include "base/port.h" |
| #include "base/scoped_handle.h" |
| #include "base/scoped_ptr.h" |
| #include "base/thread.h" |
| |
| // Usage: |
| // |
| // class MyProcessWatchDog { |
| // void Signaled(SignalType sginal_type) { |
| // cout << "signaled! " << endl; |
| // } |
| // } |
| // |
| // MyProcessWatchDog dog; |
| // dog.SetID(pid, tid, -1); |
| |
| namespace mozc { |
| |
| class Mutex; |
| |
| class ProcessWatchDog : public Thread { |
| public: |
| enum SignalType { |
| UNKNOWN_SIGNALED = 0, // default value. nerver be signaled. |
| PROCESS_SIGNALED = 1, // process is signaled, |
| PROCESS_NOT_FOUND_SIGNALED = 3, // process id was not found |
| PROCESS_ACCESS_DENIED_SIGNALED = 4, // operation was not allowed |
| PROCESS_ERROR_SIGNALED = 5, // unkown error in getting process info |
| THREAD_SIGNALED = 6, // thread is signaled |
| THREAD_NOT_FOUND_SIGNALED = 7, // thread id was not found |
| THREAD_ACCESS_DENIED_SIGNALED = 8, // operation was not allowed |
| THREAD_ERROR_SIGNALED = 9, // unkown error in getting thread info |
| TIMEOUT_SIGNALED = 10, // timeout is signaled |
| }; |
| |
| #ifdef OS_WIN |
| typedef uint32 ProcessID; |
| typedef uint32 ThreadID; |
| #else |
| typedef pid_t ProcessID; |
| // Linux/Mac has no way to export ThreadID to other process. |
| // For instance, Mac's thread id is just a pointer to the some |
| // internal data structure (_opaque_pthread_t*). |
| typedef uint32 ThreadID; |
| #endif |
| |
| static const ProcessID UnknownProcessID = static_cast<ProcessID>(-1); |
| static const ThreadID UnknownThreadID = static_cast<ThreadID>(-1); |
| |
| // Define a signal handler. |
| // if the given process or thread is terminated, Signaled() is called |
| // with SignalType defined above. |
| // Please note that Signaled() is called from different thread. |
| virtual void Signaled(ProcessWatchDog::SignalType type) {} |
| |
| // Reset process id and thread id. |
| // You can set UnknownProcessID/UnknownProcessID if |
| // they are unknown or not needed to be checked. |
| // This function returns immediately. |
| // You can set the timout for the signal. |
| // If timeout is negative, it waits forever. |
| bool SetID(ProcessID process_id, ThreadID thread_id, int timeout); |
| |
| // internally used by thread |
| void Run(); |
| |
| ProcessWatchDog(); |
| virtual ~ProcessWatchDog(); |
| |
| private: |
| #ifdef OS_WIN |
| ScopedHandle event_; |
| #endif |
| ProcessID process_id_; |
| ThreadID thread_id_; |
| int timeout_; |
| volatile bool is_finished_; |
| scoped_ptr<Mutex> mutex_; |
| }; |
| |
| } // namespace mozc |
| #endif // MOZC_IPC_PROCESS_WATCH_DOG_H_ |