1 /*

     2 * Copyright (C) 2009 Google Inc. All rights reserved.

     3 * 

     4 * Redistribution and use in source and binary forms, with or without

     5 * modification, are permitted provided that the following conditions are

     6 * met:

     7 * 

     8 *     * Redistributions of source code must retain the above copyright

     9 * notice, this list of conditions and the following disclaimer.

    10 *     * Redistributions in binary form must reproduce the above

    11 * copyright notice, this list of conditions and the following disclaimer

    12 * in the documentation and/or other materials provided with the

    13 * distribution.

    14 *     * Neither the name of Google Inc. nor the names of its

    15 * contributors may be used to endorse or promote products derived from

    16 * this software without specific prior written permission.

    17 * 

    18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

    19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

    20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

    21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

    22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

    23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

    24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

    25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

    26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    29 */

    30 

    31 #include "config.h"

    32 #include "MainThread.h"

    33 

    34 #include "Assertions.h"

    35 #include "ChromiumThreading.h"

    36 #include "Threading.h"

    37 

    38 namespace WTF {

    39 

    40 static ThreadIdentifier mainThreadIdentifier;

    41 

    42 void initializeMainThread()

    43 {

    44     static bool initializedMainThread;

    45     if (initializedMainThread)

    46         return;

    47     initializedMainThread = true;

    48 

    49     mainThreadIdentifier = currentThread();

    50 }

    51 

    52 void callOnMainThread(MainThreadFunction* function, void* context)

    53 {

    54     ChromiumThreading::callOnMainThread(function, context);

    55 }

    56 

    57 void callOnMainThreadAndWait(MainThreadFunction*, void*)

    58 {

    59     ASSERT_NOT_REACHED();

    60 }

    61 

    62 void setMainThreadCallbacksPaused(bool)

    63 {

    64     ASSERT_NOT_REACHED();

    65 }

    66 

    67 bool isMainThread()

    68 {

    69     return currentThread() == mainThreadIdentifier;

    70 }

    71 

    72 } // namespace WTF

    73