Wind Yuan | 75564b1 | 2015-01-15 06:51:15 -0500 | [diff] [blame] | 1 | /* |
| 2 | * xcam_thread.cpp - 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 | #include "xcam_thread.h" |
| 22 | #include "xcam_mutex.h" |
| 23 | |
| 24 | namespace XCam { |
| 25 | |
| 26 | Thread::Thread (const char *name) |
| 27 | : _name (NULL) |
| 28 | , _thread_id (0) |
| 29 | , _started (false) |
| 30 | { |
| 31 | if (name) |
| 32 | _name = strdup (name); |
| 33 | } |
| 34 | |
| 35 | Thread::~Thread () |
| 36 | { |
| 37 | if (_name) |
| 38 | xcam_free (_name); |
| 39 | } |
| 40 | |
| 41 | int |
| 42 | Thread::thread_func (void *user_data) |
| 43 | { |
| 44 | Thread *thread = (Thread *)user_data; |
| 45 | bool ret = true; |
| 46 | |
| 47 | { |
| 48 | // Make sure running after start |
| 49 | SmartLock locker(thread->_mutex); |
| 50 | pthread_detach (pthread_self()); |
| 51 | } |
| 52 | ret = thread->started (); |
| 53 | |
| 54 | while (true) { |
| 55 | { |
| 56 | SmartLock locker(thread->_mutex); |
| 57 | if (!thread->_started || ret == false) { |
| 58 | thread->_started = false; |
| 59 | thread->_thread_id = 0; |
| 60 | thread->_exit_cond.signal(); |
| 61 | ret = false; |
| 62 | break; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | ret = thread->loop (); |
| 67 | } |
| 68 | |
| 69 | thread->stopped (); |
| 70 | |
| 71 | return 0; |
| 72 | } |
| 73 | |
| 74 | bool |
| 75 | Thread::started () |
| 76 | { |
| 77 | XCAM_LOG_DEBUG ("Thread(%s) started", XCAM_STR(_name)); |
| 78 | return true; |
| 79 | } |
| 80 | |
| 81 | void |
| 82 | Thread::stopped () |
| 83 | { |
| 84 | XCAM_LOG_DEBUG ("Thread(%s) stopped", XCAM_STR(_name)); |
| 85 | } |
| 86 | |
| 87 | bool Thread::start () |
| 88 | { |
| 89 | SmartLock locker(_mutex); |
| 90 | if (_started) |
| 91 | return true; |
| 92 | |
| 93 | if (pthread_create (&_thread_id, NULL, (void * (*)(void*))thread_func, this) != 0) |
| 94 | return false; |
| 95 | _started = true; |
| 96 | return true; |
| 97 | } |
| 98 | |
| 99 | bool Thread::stop () |
| 100 | { |
| 101 | SmartLock locker(_mutex); |
| 102 | if (_started) { |
| 103 | _started = false; |
| 104 | _exit_cond.wait(_mutex); |
| 105 | } |
| 106 | return true; |
| 107 | } |
| 108 | |
| 109 | bool Thread::is_running () |
| 110 | { |
| 111 | SmartLock locker(_mutex); |
| 112 | return _started; |
| 113 | } |
| 114 | |
| 115 | }; |