profiler/CallIdentifier.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  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26
  27 #ifndef CallIdentifier_h
  28 #define CallIdentifier_h
  29
  30 #include <runtime/UString.h>
  31
  32 namespace JSC {
  33
  34     struct CallIdentifier {
  35         UString m_name;
  36         UString m_url;
  37         unsigned m_lineNumber;
  38
  39         CallIdentifier()
  40             : m_lineNumber(0)
  41         {
  42         }
  43
  44         CallIdentifier(const UString& name, const UString& url, int lineNumber)
  45             : m_name(name)
  46             , m_url(url)
  47             , m_lineNumber(lineNumber)
  48         {
  49         }
  50
  51         inline bool operator==(const CallIdentifier& ci) const { return ci.m_lineNumber == m_lineNumber && ci.m_name == m_name && ci.m_url == m_url; }
  52         inline bool operator!=(const CallIdentifier& ci) const { return !(*this == ci); }
  53
  54 #ifndef NDEBUG
  55         operator const char*() const { return c_str(); }
  56         const char* c_str() const { return m_name.UTF8String().c_str(); }
  57 #endif
  58     };
  59
  60     struct CallIdentifierHash {
  61         static unsigned hash(const CallIdentifier& key)
  62         {
  63             unsigned hashCodes[3] = {
  64                 key.m_name.rep()->hash(),
  65                 key.m_url.rep()->hash(),
  66                 key.m_lineNumber
  67             };
  68             return UString::Rep::computeHash(reinterpret_cast<char*>(hashCodes), sizeof(hashCodes));
  69         }
  70
  71         static bool equal(const CallIdentifier& a, const CallIdentifier& b) { return a == b; }
  72         static const bool safeToCompareToEmptyOrDeleted = true;
  73     };
  74
  75 } // namespace JSC
  76
  77 namespace WTF {
  78
  79     template<> struct DefaultHash<JSC::CallIdentifier> { typedef JSC::CallIdentifierHash Hash; };
  80
  81     template<> struct HashTraits<JSC::CallIdentifier> : GenericHashTraits<JSC::CallIdentifier> {
  82         static void constructDeletedValue(JSC::CallIdentifier& slot)
  83         {
  84             new (&slot) JSC::CallIdentifier(JSC::UString(), JSC::UString(), std::numeric_limits<unsigned>::max());
  85         }
  86         static bool isDeletedValue(const JSC::CallIdentifier& value)
  87         {
  88             return value.m_name.isNull() && value.m_url.isNull() && value.m_lineNumber == std::numeric_limits<unsigned>::max();
  89         }
  90     };
  91
  92 } // namespace WTF
  93
  94 #endif  // CallIdentifier_h
  95