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      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 StringHasher::hashMemory<sizeof(hashCodes)>(hashCodes);
     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
     89