1 /* 2 * thread.cpp, thread class 3 * 4 * Copyright (c) 2009-2010 Wind River Systems, Inc. 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 19 #include <pthread.h> 20 #include <thread.h> 21 22 Thread::Thread() 23 { 24 r = NULL; 25 created = false; 26 id = 0; 27 28 pthread_mutex_init(&lock, NULL); 29 } 30 31 Thread::Thread(RunnableInterface *r) 32 { 33 this->r = r; 34 created = false; 35 id = 0; 36 37 pthread_mutex_init(&lock, NULL); 38 } 39 40 Thread::~Thread() 41 { 42 Join(); 43 44 pthread_mutex_destroy(&lock); 45 } 46 47 int Thread::Start(void) 48 { 49 int ret = 0; 50 51 pthread_mutex_lock(&lock); 52 if (!created) { 53 ret = pthread_create(&id, NULL, Instance, this); 54 if (!ret) 55 created = true; 56 } 57 pthread_mutex_unlock(&lock); 58 59 return ret; 60 } 61 62 int Thread::Join(void) 63 { 64 int ret = 0; 65 66 pthread_mutex_lock(&lock); 67 if (created) { 68 ret = pthread_join(id, NULL); 69 created = false; 70 } 71 pthread_mutex_unlock(&lock); 72 73 return ret; 74 } 75 76 void *Thread::Instance(void *p) 77 { 78 Thread *t = static_cast<Thread *>(p); 79 80 t->Run(); 81 82 return NULL; 83 } 84 85 void Thread::Run(void) 86 { 87 if (r) 88 r->Run(); 89 else 90 return; 91 } 92
