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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 #include "emugl/common/thread_store.h"
     19 
     20 namespace osUtils {
     21 
     22 Thread::Thread() :
     23     m_thread(NULL),
     24     m_threadId(0),
     25     m_isRunning(false)
     26 {
     27 }
     28 
     29 Thread::~Thread()
     30 {
     31     if(m_thread) {
     32         CloseHandle(m_thread);
     33     }
     34 }
     35 
     36 bool
     37 Thread::start()
     38 {
     39     m_isRunning = true;
     40     m_thread = CreateThread(NULL, 0, &Thread::thread_main, this, 0, &m_threadId);
     41     if(!m_thread) {
     42         m_isRunning = false;
     43     }
     44     return m_isRunning;
     45 }
     46 
     47 bool
     48 Thread::wait(int *exitStatus)
     49 {
     50     if (!m_isRunning) {
     51         return false;
     52     }
     53 
     54     if(WaitForSingleObject(m_thread, INFINITE) == WAIT_FAILED) {
     55         return false;
     56     }
     57 
     58     DWORD retval;
     59     if (!GetExitCodeThread(m_thread,&retval)) {
     60         return false;
     61     }
     62 
     63     m_isRunning = 0;
     64 
     65     if (exitStatus) {
     66         *exitStatus = retval;
     67     }
     68     return true;
     69 }
     70 
     71 bool
     72 Thread::trywait(int *exitStatus)
     73 {
     74     if (!m_isRunning) {
     75         return false;
     76     }
     77 
     78     if(WaitForSingleObject(m_thread, 0) == WAIT_OBJECT_0) {
     79 
     80         DWORD retval;
     81         if (!GetExitCodeThread(m_thread,&retval)) {
     82             return true;
     83         }
     84 
     85         if (exitStatus) {
     86             *exitStatus = retval;
     87         }
     88         return true;
     89     }
     90 
     91     return false;
     92 }
     93 
     94 DWORD WINAPI
     95 Thread::thread_main(void *p_arg)
     96 {
     97     Thread *self = (Thread *)p_arg;
     98     int ret = self->Main();
     99     self->m_isRunning = false;
    100     ::emugl::ThreadStore::OnThreadExit();
    101     return ret;
    102 }
    103 
    104 } // of namespace osUtils
    105