1 /*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #include "osThread.h"
17
18 namespace osUtils {
19
Thread()20 Thread::Thread() :
21 m_thread((pthread_t)NULL),
22 m_exitStatus(0),
23 m_isRunning(false)
24 {
25 pthread_mutex_init(&m_lock, NULL);
26 }
27
~Thread()28 Thread::~Thread()
29 {
30 pthread_mutex_destroy(&m_lock);
31 }
32
33 bool
start()34 Thread::start()
35 {
36 pthread_mutex_lock(&m_lock);
37 m_isRunning = true;
38 int ret = pthread_create(&m_thread, NULL, Thread::thread_main, this);
39 if(ret) {
40 m_isRunning = false;
41 }
42 pthread_mutex_unlock(&m_lock);
43 return m_isRunning;
44 }
45
46 bool
wait(int * exitStatus)47 Thread::wait(int *exitStatus)
48 {
49 if (!m_isRunning) {
50 return false;
51 }
52
53 void *retval;
54 if (pthread_join(m_thread,&retval)) {
55 return false;
56 }
57
58 long long int ret=(long long int)retval;
59 if (exitStatus) {
60 *exitStatus = (int)ret;
61 }
62 return true;
63 }
64
65 bool
trywait(int * exitStatus)66 Thread::trywait(int *exitStatus)
67 {
68 bool ret = false;
69
70 pthread_mutex_lock(&m_lock);
71 if (!m_isRunning) {
72 *exitStatus = m_exitStatus;
73 ret = true;
74 }
75 pthread_mutex_unlock(&m_lock);
76 return ret;
77 }
78
79 void *
thread_main(void * p_arg)80 Thread::thread_main(void *p_arg)
81 {
82 Thread *self = (Thread *)p_arg;
83 int ret = self->Main();
84
85 pthread_mutex_lock(&self->m_lock);
86 self->m_isRunning = false;
87 self->m_exitStatus = ret;
88 pthread_mutex_unlock(&self->m_lock);
89
90 return (void*)ret;
91 }
92
93 } // of namespace osUtils
94
95