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      1 /*
      2  *  Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
      3  *
      4  *  This library is free software; you can redistribute it and/or
      5  *  modify it under the terms of the GNU Library General Public
      6  *  License as published by the Free Software Foundation; either
      7  *  version 2 of the License, or (at your option) any later version.
      8  *
      9  *  This library is distributed in the hope that it will be useful,
     10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  *  Library General Public License for more details.
     13  *
     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
     16  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  *  Boston, MA 02110-1301, USA.
     18  *
     19  */
     20 
     21 #ifndef WTF_FastMalloc_h
     22 #define WTF_FastMalloc_h
     23 
     24 #include "wtf/WTFExport.h"
     25 #include <cstddef>
     26 
     27 namespace WTF {
     28 
     29     // These functions crash safely if an allocation fails.
     30     WTF_EXPORT void* fastMalloc(size_t);
     31     WTF_EXPORT void* fastZeroedMalloc(size_t);
     32     WTF_EXPORT void* fastCalloc(size_t numElements, size_t elementSize);
     33     WTF_EXPORT void* fastRealloc(void*, size_t);
     34     WTF_EXPORT char* fastStrDup(const char*);
     35     WTF_EXPORT size_t fastMallocGoodSize(size_t);
     36 
     37     WTF_EXPORT void fastFree(void*);
     38 
     39 #ifndef NDEBUG
     40     WTF_EXPORT void fastMallocForbid();
     41     WTF_EXPORT void fastMallocAllow();
     42 #endif
     43 
     44     WTF_EXPORT void releaseFastMallocFreeMemory();
     45 
     46     struct FastMallocStatistics {
     47         size_t reservedVMBytes;
     48         size_t committedVMBytes;
     49         size_t freeListBytes;
     50     };
     51     WTF_EXPORT FastMallocStatistics fastMallocStatistics();
     52 
     53     // This defines a type which holds an unsigned integer and is the same
     54     // size as the minimally aligned memory allocation.
     55     typedef unsigned long long AllocAlignmentInteger;
     56 
     57 } // namespace WTF
     58 
     59 using WTF::fastCalloc;
     60 using WTF::fastFree;
     61 using WTF::fastMalloc;
     62 using WTF::fastMallocGoodSize;
     63 using WTF::fastRealloc;
     64 using WTF::fastStrDup;
     65 using WTF::fastZeroedMalloc;
     66 
     67 #ifndef NDEBUG
     68 using WTF::fastMallocForbid;
     69 using WTF::fastMallocAllow;
     70 #endif
     71 
     72 #endif /* WTF_FastMalloc_h */
     73