1 : /* ***** BEGIN LICENSE BLOCK *****
2 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
3 : *
4 : * The contents of this file are subject to the Mozilla Public License Version
5 : * 1.1 (the "License"); you may not use this file except in compliance with
6 : * the License. You may obtain a copy of the License at
7 : * http://www.mozilla.org/MPL/
8 : *
9 : * Software distributed under the License is distributed on an "AS IS" basis,
10 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
11 : * for the specific language governing rights and limitations under the
12 : * License.
13 : *
14 : * The Original Code is mozilla.org code.
15 : *
16 : * The Initial Developer of the Original Code is
17 : * Red Hat, Inc.
18 : * Portions created by the Initial Developer are Copyright (C) 2006
19 : * the Initial Developer. All Rights Reserved.
20 : *
21 : * Contributor(s):
22 : * Kai Engert <kengert@redhat.com>
23 : *
24 : * Alternatively, the contents of this file may be used under the terms of
25 : * either the GNU General Public License Version 2 or later (the "GPL"), or
26 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
27 : * in which case the provisions of the GPL or the LGPL are applicable instead
28 : * of those above. If you wish to allow use of your version of this file only
29 : * under the terms of either the GPL or the LGPL, and not to allow others to
30 : * use your version of this file under the terms of the MPL, indicate your
31 : * decision by deleting the provisions above and replace them with the notice
32 : * and other provisions required by the GPL or the LGPL. If you do not delete
33 : * the provisions above, a recipient may use your version of this file under
34 : * the terms of any one of the MPL, the GPL or the LGPL.
35 : *
36 : * ***** END LICENSE BLOCK ***** */
37 :
38 : #include "nsPSMBackgroundThread.h"
39 : #include "nsThreadUtils.h"
40 :
41 : using namespace mozilla;
42 :
43 328 : void PR_CALLBACK nsPSMBackgroundThread::nsThreadRunner(void *arg)
44 : {
45 328 : nsPSMBackgroundThread *self = static_cast<nsPSMBackgroundThread *>(arg);
46 328 : self->Run();
47 328 : }
48 :
49 328 : nsPSMBackgroundThread::nsPSMBackgroundThread()
50 : : mThreadHandle(nsnull),
51 : mMutex("nsPSMBackgroundThread.mMutex"),
52 : mCond(mMutex, "nsPSMBackgroundThread.mCond"),
53 328 : mExitState(ePSMThreadRunning)
54 : {
55 328 : }
56 :
57 328 : nsresult nsPSMBackgroundThread::startThread()
58 : {
59 : mThreadHandle = PR_CreateThread(PR_USER_THREAD, nsThreadRunner, static_cast<void*>(this),
60 328 : PR_PRIORITY_NORMAL, PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0);
61 :
62 328 : NS_ASSERTION(mThreadHandle, "Could not create nsPSMBackgroundThread\n");
63 :
64 328 : if (!mThreadHandle)
65 0 : return NS_ERROR_OUT_OF_MEMORY;
66 :
67 328 : return NS_OK;
68 : }
69 :
70 328 : nsPSMBackgroundThread::~nsPSMBackgroundThread()
71 : {
72 656 : }
73 :
74 : bool
75 984 : nsPSMBackgroundThread::exitRequested(const MutexAutoLock & /*proofOfLock*/) const
76 : {
77 984 : return exitRequestedNoLock();
78 : }
79 :
80 : nsresult
81 328 : nsPSMBackgroundThread::postStoppedEventToMainThread(
82 : MutexAutoLock const & /*proofOfLock*/)
83 : {
84 328 : NS_ASSERTION(PR_GetCurrentThread() == mThreadHandle,
85 : "Background thread stopped from another thread");
86 :
87 328 : mExitState = ePSMThreadStopped;
88 : // requestExit is waiting for an event, so give it one.
89 328 : return NS_DispatchToMainThread(new nsRunnable());
90 : }
91 :
92 643 : void nsPSMBackgroundThread::requestExit()
93 : {
94 643 : NS_ASSERTION(NS_IsMainThread(),
95 : "nsPSMBackgroundThread::requestExit called off main thread.");
96 :
97 643 : if (!mThreadHandle)
98 315 : return;
99 :
100 : {
101 656 : MutexAutoLock threadLock(mMutex);
102 328 : if (mExitState < ePSMThreadStopRequested) {
103 328 : mExitState = ePSMThreadStopRequested;
104 328 : mCond.NotifyAll();
105 : }
106 : }
107 :
108 656 : nsCOMPtr<nsIThread> mainThread = do_GetCurrentThread();
109 2902 : for (;;) {
110 : {
111 6460 : MutexAutoLock threadLock(mMutex);
112 3230 : if (mExitState == ePSMThreadStopped)
113 : break;
114 : }
115 2902 : NS_ProcessPendingEvents(mainThread, PR_MillisecondsToInterval(50));
116 : }
117 :
118 328 : PR_JoinThread(mThreadHandle);
119 328 : mThreadHandle = nsnull;
120 : }
|