WebCore/SchedulePair.h

   1 /*
   2  * Copyright (C) 2008 Apple 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
   6  * are met:
   7  *
   8  * 1.  Redistributions of source code must retain the above copyright
   9  *     notice, this list of conditions and the following disclaimer.
  10  * 2.  Redistributions in binary form must reproduce the above copyright
  11  *     notice, this list of conditions and the following disclaimer in the
  12  *     documentation and/or other materials provided with the distribution.
  13  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
  14  *     its contributors may be used to endorse or promote products derived
  15  *     from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
  18  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
  21  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  22  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  24  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #ifndef SchedulePair_h
  30 #define SchedulePair_h
  31
  32 #include "PlatformString.h"
  33 #include <wtf/HashSet.h>
  34 #include <wtf/RetainPtr.h>
  35
  36 #if PLATFORM(MAC)
  37 #ifdef __OBJC__
  38 @class NSRunLoop;
  39 #else
  40 class NSRunLoop;
  41 #endif
  42 #endif
  43
  44 namespace WebCore {
  45
  46 class SchedulePair : public RefCounted<SchedulePair> {
  47 public:
  48     static PassRefPtr<SchedulePair> create(CFRunLoopRef runLoop, CFStringRef mode) { return adoptRef(new SchedulePair(runLoop, mode)); }
  49
  50 #if PLATFORM(MAC)
  51     static PassRefPtr<SchedulePair> create(NSRunLoop* runLoop, CFStringRef mode) { return adoptRef(new SchedulePair(runLoop, mode)); }
  52     NSRunLoop* nsRunLoop() const { return m_nsRunLoop.get(); }
  53 #endif
  54
  55     CFRunLoopRef runLoop() const { return m_runLoop.get(); }
  56     CFStringRef mode() const { return m_mode.get(); }
  57
  58     bool operator==(const SchedulePair& other) const;
  59
  60 private:
  61     SchedulePair(CFRunLoopRef, CFStringRef);
  62
  63 #if PLATFORM(MAC)
  64     SchedulePair(NSRunLoop*, CFStringRef);
  65     RetainPtr<NSRunLoop*> m_nsRunLoop;
  66 #endif
  67
  68     RetainPtr<CFRunLoopRef> m_runLoop;
  69     RetainPtr<CFStringRef> m_mode;
  70 };
  71
  72 struct SchedulePairHash {
  73     static unsigned hash(const RefPtr<SchedulePair>& pair)
  74     {
  75         uintptr_t hashCodes[2] = { reinterpret_cast<uintptr_t>(pair->runLoop()), pair->mode() ? CFHash(pair->mode()) : 0 };
  76         return StringImpl::computeHash(reinterpret_cast<UChar*>(hashCodes), sizeof(hashCodes) / sizeof(UChar));
  77     }
  78
  79     static bool equal(const RefPtr<SchedulePair>& a, const RefPtr<SchedulePair>& b) { return a == b; }
  80
  81     static const bool safeToCompareToEmptyOrDeleted = true;
  82 };
  83
  84 typedef HashSet<RefPtr<SchedulePair>, SchedulePairHash> SchedulePairHashSet;
  85
  86 } // namespace WebCore
  87
  88 #endif