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| 1 /* | 1 /* | 
| 2  *  Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. | 2  *  Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. | 
| 3  * | 3  * | 
| 4  *  This library is free software; you can redistribute it and/or | 4  *  This library is free software; you can redistribute it and/or | 
| 5  *  modify it under the terms of the GNU Library General Public | 5  *  modify it under the terms of the GNU Library General Public | 
| 6  *  License as published by the Free Software Foundation; either | 6  *  License as published by the Free Software Foundation; either | 
| 7  *  version 2 of the License, or (at your option) any later version. | 7  *  version 2 of the License, or (at your option) any later version. | 
| 8  * | 8  * | 
| 9  *  This library is distributed in the hope that it will be useful, | 9  *  This library is distributed in the hope that it will be useful, | 
| 10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of | 10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of | 
| 11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU | 11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU | 
| 12  *  Library General Public License for more details. | 12  *  Library General Public License for more details. | 
| 13  * | 13  * | 
| 14  *  You should have received a copy of the GNU Library General Public License | 14  *  You should have received a copy of the GNU Library General Public License | 
| 15  *  along with this library; see the file COPYING.LIB.  If not, write to | 15  *  along with this library; see the file COPYING.LIB.  If not, write to | 
| 16  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | 16  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | 
| 17  *  Boston, MA 02110-1301, USA. | 17  *  Boston, MA 02110-1301, USA. | 
| 18  * | 18  * | 
| 19  */ | 19  */ | 
| 20 | 20 | 
| 21 #ifndef WTF_FastMalloc_h | 21 #ifndef WTF_FastMalloc_h | 
| 22 #define WTF_FastMalloc_h | 22 #define WTF_FastMalloc_h | 
| 23 | 23 | 
| 24 #include <wtf/Platform.h> | 24 #include <new> | 
| 25 #include <wtf/PossiblyNull.h> |  | 
| 26 #include <stdlib.h> | 25 #include <stdlib.h> | 
| 27 #include <new> | 26 | 
|  | 27 #include "wtf/Platform.h" | 
|  | 28 #include "wtf/PossiblyNull.h" | 
|  | 29 #include "wtf/WTFExport.h" | 
| 28 | 30 | 
| 29 namespace WTF { | 31 namespace WTF { | 
| 30 | 32 | 
| 31     // These functions call CRASH() if an allocation fails. | 33     // These functions call CRASH() if an allocation fails. | 
| 32     void* fastMalloc(size_t); | 34     WTF_EXPORT void* fastMalloc(size_t); | 
| 33     void* fastZeroedMalloc(size_t); | 35     WTF_EXPORT void* fastZeroedMalloc(size_t); | 
| 34     void* fastCalloc(size_t numElements, size_t elementSize); | 36     WTF_EXPORT void* fastCalloc(size_t numElements, size_t elementSize); | 
| 35     void* fastRealloc(void*, size_t); | 37     WTF_EXPORT void* fastRealloc(void*, size_t); | 
| 36     char* fastStrDup(const char*); | 38     WTF_EXPORT char* fastStrDup(const char*); | 
| 37     size_t fastMallocSize(const void*); | 39     WTF_EXPORT size_t fastMallocSize(const void*); | 
| 38     size_t fastMallocGoodSize(size_t); | 40     WTF_EXPORT size_t fastMallocGoodSize(size_t); | 
| 39 | 41 | 
| 40     struct TryMallocReturnValue { | 42     struct TryMallocReturnValue { | 
| 41         TryMallocReturnValue(void* data) | 43         TryMallocReturnValue(void* data) | 
| 42             : m_data(data) | 44             : m_data(data) | 
| 43         { | 45         { | 
| 44         } | 46         } | 
| 45         TryMallocReturnValue(const TryMallocReturnValue& source) | 47         TryMallocReturnValue(const TryMallocReturnValue& source) | 
| 46             : m_data(source.m_data) | 48             : m_data(source.m_data) | 
| 47         { | 49         { | 
| 48             source.m_data = 0; | 50             source.m_data = 0; | 
| (...skipping 13 matching lines...) Expand all  Loading... | 
| 62     template <typename T> bool TryMallocReturnValue::getValue(T& data) | 64     template <typename T> bool TryMallocReturnValue::getValue(T& data) | 
| 63     { | 65     { | 
| 64         union u { void* data; T target; } res; | 66         union u { void* data; T target; } res; | 
| 65         res.data = m_data; | 67         res.data = m_data; | 
| 66         data = res.target; | 68         data = res.target; | 
| 67         bool returnValue = !!m_data; | 69         bool returnValue = !!m_data; | 
| 68         m_data = 0; | 70         m_data = 0; | 
| 69         return returnValue; | 71         return returnValue; | 
| 70     } | 72     } | 
| 71 | 73 | 
| 72     TryMallocReturnValue tryFastMalloc(size_t n); | 74     WTF_EXPORT TryMallocReturnValue tryFastMalloc(size_t n); | 
| 73     TryMallocReturnValue tryFastZeroedMalloc(size_t n); | 75     WTF_EXPORT TryMallocReturnValue tryFastZeroedMalloc(size_t n); | 
| 74     TryMallocReturnValue tryFastCalloc(size_t n_elements, size_t element_size); | 76     WTF_EXPORT TryMallocReturnValue tryFastCalloc(size_t n_elements, size_t elem
     ent_size); | 
| 75     TryMallocReturnValue tryFastRealloc(void* p, size_t n); | 77     WTF_EXPORT TryMallocReturnValue tryFastRealloc(void* p, size_t n); | 
| 76 | 78 | 
| 77     void fastFree(void*); | 79     WTF_EXPORT void fastFree(void*); | 
| 78 | 80 | 
| 79 #ifndef NDEBUG | 81 #ifndef NDEBUG | 
| 80     void fastMallocForbid(); | 82     WTF_EXPORT void fastMallocForbid(); | 
| 81     void fastMallocAllow(); | 83     WTF_EXPORT void fastMallocAllow(); | 
| 82 #endif | 84 #endif | 
| 83 | 85 | 
| 84     void releaseFastMallocFreeMemory(); | 86     WTF_EXPORT void releaseFastMallocFreeMemory(); | 
| 85 | 87 | 
| 86     struct FastMallocStatistics { | 88     struct FastMallocStatistics { | 
| 87         size_t reservedVMBytes; | 89         size_t reservedVMBytes; | 
| 88         size_t committedVMBytes; | 90         size_t committedVMBytes; | 
| 89         size_t freeListBytes; | 91         size_t freeListBytes; | 
| 90     }; | 92     }; | 
| 91     FastMallocStatistics fastMallocStatistics(); | 93     WTF_EXPORT FastMallocStatistics fastMallocStatistics(); | 
| 92 | 94 | 
| 93     // This defines a type which holds an unsigned integer and is the same | 95     // This defines a type which holds an unsigned integer and is the same | 
| 94     // size as the minimally aligned memory allocation. | 96     // size as the minimally aligned memory allocation. | 
| 95     typedef unsigned long long AllocAlignmentInteger; | 97     typedef unsigned long long AllocAlignmentInteger; | 
| 96 | 98 | 
| 97     namespace Internal { | 99     namespace Internal { | 
| 98         enum AllocType {                    // Start with an unusual number inst
     ead of zero, because zero is common. | 100         enum AllocType {                    // Start with an unusual number inst
     ead of zero, because zero is common. | 
| 99             AllocTypeMalloc = 0x375d6750,   // Encompasses fastMalloc, fastZeroe
     dMalloc, fastCalloc, fastRealloc. | 101             AllocTypeMalloc = 0x375d6750,   // Encompasses fastMalloc, fastZeroe
     dMalloc, fastCalloc, fastRealloc. | 
| 100             AllocTypeClassNew,              // Encompasses class operator new fr
     om FastAllocBase. | 102             AllocTypeClassNew,              // Encompasses class operator new fr
     om FastAllocBase. | 
| 101             AllocTypeClassNewArray,         // Encompasses class operator new[] 
     from FastAllocBase. | 103             AllocTypeClassNewArray,         // Encompasses class operator new[] 
     from FastAllocBase. | 
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| 233 using WTF::tryFastMalloc; | 235 using WTF::tryFastMalloc; | 
| 234 using WTF::tryFastRealloc; | 236 using WTF::tryFastRealloc; | 
| 235 using WTF::tryFastZeroedMalloc; | 237 using WTF::tryFastZeroedMalloc; | 
| 236 | 238 | 
| 237 #ifndef NDEBUG | 239 #ifndef NDEBUG | 
| 238 using WTF::fastMallocForbid; | 240 using WTF::fastMallocForbid; | 
| 239 using WTF::fastMallocAllow; | 241 using WTF::fastMallocAllow; | 
| 240 #endif | 242 #endif | 
| 241 | 243 | 
| 242 #endif /* WTF_FastMalloc_h */ | 244 #endif /* WTF_FastMalloc_h */ | 
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