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      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 
     20 Thread::Thread() :
     21     m_thread(NULL),
     22     m_threadId(0),
     23     m_isRunning(false)
     24 {
     25 }
     26 
     27 Thread::~Thread()
     28 {
     29     if(m_thread) {
     30         CloseHandle(m_thread);
     31     }
     32 }
     33 
     34 bool
     35 Thread::start()
     36 {
     37     m_isRunning = true;
     38     m_thread = CreateThread(NULL, 0, &Thread::thread_main, this, 0, &m_threadId);
     39     if(!m_thread) {
     40         m_isRunning = false;
     41     }
     42     return m_isRunning;
     43 }
     44 
     45 bool
     46 Thread::wait(int *exitStatus)
     47 {
     48     if (!m_isRunning) {
     49         return false;
     50     }
     51 
     52     if(WaitForSingleObject(m_thread, INFINITE) == WAIT_FAILED) {
     53         return false;
     54     }
     55 
     56     DWORD retval;
     57     if (!GetExitCodeThread(m_thread,&retval)) {
     58         return false;
     59     }
     60 
     61     m_isRunning = 0;
     62 
     63     if (exitStatus) {
     64         *exitStatus = retval;
     65     }
     66     return true;
     67 }
     68 
     69 bool
     70 Thread::trywait(int *exitStatus)
     71 {
     72     if (!m_isRunning) {
     73         return false;
     74     }
     75 
     76     if(WaitForSingleObject(m_thread, 0) == WAIT_OBJECT_0) {
     77 
     78         DWORD retval;
     79         if (!GetExitCodeThread(m_thread,&retval)) {
     80             return true;
     81         }
     82 
     83         if (exitStatus) {
     84             *exitStatus = retval;
     85         }
     86         return true;
     87     }
     88 
     89     return false;
     90 }
     91 
     92 DWORD WINAPI
     93 Thread::thread_main(void *p_arg)
     94 {
     95     Thread *self = (Thread *)p_arg;
     96     int ret = self->Main();
     97     self->m_isRunning = false;
     98     return ret;
     99 }
    100 
    101 } // of namespace osUtils
    102