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      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 "WebKit.h"
     33 
     34 #include "AtomicString.h"
     35 #include "DOMTimer.h"
     36 #include "Logging.h"
     37 #include "Page.h"
     38 #include "RuntimeEnabledFeatures.h"
     39 #include "TextEncoding.h"
     40 #include "WebMediaPlayerClientImpl.h"
     41 #include "WebSocket.h"
     42 #include "WorkerContextExecutionProxy.h"
     43 
     44 #include <wtf/Assertions.h>
     45 #include <wtf/Threading.h>
     46 
     47 namespace WebKit {
     48 
     49 static WebKitClient* s_webKitClient = 0;
     50 static bool s_layoutTestMode = false;
     51 
     52 void initialize(WebKitClient* webKitClient)
     53 {
     54     ASSERT(webKitClient);
     55     ASSERT(!s_webKitClient);
     56     s_webKitClient = webKitClient;
     57 
     58     WTF::initializeThreading();
     59     WebCore::AtomicString::init();
     60 
     61     // Chromium sets the minimum interval timeout to 4ms, overriding the
     62     // default of 10ms.  We'd like to go lower, however there are poorly
     63     // coded websites out there which do create CPU-spinning loops.  Using
     64     // 4ms prevents the CPU from spinning too busily and provides a balance
     65     // between CPU spinning and the smallest possible interval timer.
     66     WebCore::DOMTimer::setMinTimerInterval(0.004);
     67 
     68     // There are some code paths (for example, running WebKit in the browser
     69     // process and calling into LocalStorage before anything else) where the
     70     // UTF8 string encoding tables are used on a background thread before
     71     // they're set up.  This is a problem because their set up routines assert
     72     // they're running on the main WebKitThread.  It might be possible to make
     73     // the initialization thread-safe, but given that so many code paths use
     74     // this, initializing this lazily probably doesn't buy us much.
     75     WebCore::UTF8Encoding();
     76 }
     77 
     78 void shutdown()
     79 {
     80     s_webKitClient = 0;
     81 }
     82 
     83 WebKitClient* webKitClient()
     84 {
     85     return s_webKitClient;
     86 }
     87 
     88 void setLayoutTestMode(bool value)
     89 {
     90     s_layoutTestMode = value;
     91 }
     92 
     93 bool layoutTestMode()
     94 {
     95     return s_layoutTestMode;
     96 }
     97 
     98 void enableLogChannel(const char* name)
     99 {
    100     WTFLogChannel* channel = WebCore::getChannelFromName(name);
    101     if (channel)
    102         channel->state = WTFLogChannelOn;
    103 }
    104 
    105 void resetPluginCache(bool reloadPages)
    106 {
    107     WebCore::Page::refreshPlugins(reloadPages);
    108 }
    109 
    110 } // namespace WebKit
    111