third_party/WebKit/Source/wtf/WTF.cpp

   1 /*
   2  * Copyright (C) 2013 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 "WTF.h"
  33
  34 #include "wtf/ArrayBufferContents.h"
  35 #include "wtf/Assertions.h"
  36 #include "wtf/FastMalloc.h"
  37 #include "wtf/Partitions.h"
  38
  39 namespace WTF {
  40
  41 extern void initializeThreading();
  42
  43 bool s_initialized;
  44 bool s_shutdown;
  45
  46 void initialize(TimeFunction currentTimeFunction, TimeFunction monotonicallyIncreasingTimeFunction, TimeFunction systemTraceTimeFunction, HistogramEnumerationFunction histogramEnumerationFunction, AdjustAmountOfExternalAllocatedMemoryFunction adjustAmountOfExternalAllocatedMemoryFunction)
  47 {
  48     // WTF, and Blink in general, cannot handle being re-initialized, even if shutdown first.
  49     // Make that explicit here.
  50     ASSERT(!s_initialized);
  51     ASSERT(!s_shutdown);
  52     s_initialized = true;
  53     setCurrentTimeFunction(currentTimeFunction);
  54     setMonotonicallyIncreasingTimeFunction(monotonicallyIncreasingTimeFunction);
  55     setSystemTraceTimeFunction(systemTraceTimeFunction);
  56     Partitions::initialize();
  57     Partitions::setHistogramEnumeration(histogramEnumerationFunction);
  58     ArrayBufferContents::setAdjustAmoutOfExternalAllocatedMemoryFunction(adjustAmountOfExternalAllocatedMemoryFunction);
  59     initializeThreading();
  60 }
  61
  62 void shutdown()
  63 {
  64     ASSERT(s_initialized);
  65     ASSERT(!s_shutdown);
  66     s_shutdown = true;
  67     Partitions::shutdown();
  68 }
  69
  70 bool isShutdown()
  71 {
  72     return s_shutdown;
  73 }
  74
  75 } // namespace WTF