1 /* 2 * xcam_thread.h - Thread 3 * 4 * Copyright (c) 2014 Intel Corporation 5 * 6 * Licensed under the Apache License, Version 2.0 (the "License"); 7 * you may not use this file except in compliance with the License. 8 * You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 * 18 * Author: Wind Yuan <feng.yuan@intel.com> 19 */ 20 21 #ifndef XCAM_THREAD_H 22 #define XCAM_THREAD_H 23 24 #include <xcam_std.h> 25 #include <xcam_mutex.h> 26 27 namespace XCam { 28 29 class Thread { 30 public: 31 Thread (const char *name = NULL); 32 virtual ~Thread (); 33 34 bool start (); 35 virtual bool emit_stop (); 36 bool stop (); 37 bool is_running (); get_name()38 const char *get_name () const { 39 return _name ? "noname" : _name; 40 } 41 42 // set the policy/priority of scheduling before creating thread set_policy(int policy)43 void set_policy(int policy) { 44 _policy = policy; 45 } set_priority(int priority)46 void set_priority(int priority) { 47 _priority = priority; 48 } 49 50 protected: 51 // return true to start loop, else the thread stopped 52 virtual bool started (); 53 virtual void stopped (); 54 // return true to continue; false to stop 55 virtual bool loop () = 0; 56 private: 57 XCAM_DEAD_COPY (Thread); 58 59 60 private: 61 static void* thread_func (void *user_data); 62 63 private: 64 char *_name; 65 pthread_t _thread_id; 66 XCam::Mutex _mutex; 67 XCam::Cond _exit_cond; 68 bool _started; 69 bool _stopped; 70 int _policy; 71 int _priority; 72 }; 73 74 } 75 76 #endif //XCAM_THREAD_H 77