1 // Copyright (c) 2005, 2007, Google Inc. 2 // All rights reserved. 3 // Copyright (C) 2005, 2006, 2007, 2008, 2009, 2011 Apple Inc. All rights reserved. 4 // 5 // Redistribution and use in source and binary forms, with or without 6 // modification, are permitted provided that the following conditions are 7 // met: 8 // 9 // * Redistributions of source code must retain the above copyright 10 // notice, this list of conditions and the following disclaimer. 11 // * Redistributions in binary form must reproduce the above 12 // copyright notice, this list of conditions and the following disclaimer 13 // in the documentation and/or other materials provided with the 14 // distribution. 15 // * Neither the name of Google Inc. nor the names of its 16 // contributors may be used to endorse or promote products derived from 17 // this software without specific prior written permission. 18 // 19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 31 #include "config.h" 32 #include "wtf/FastMalloc.h" 33 34 #include "wtf/PartitionAlloc.h" 35 #include "wtf/SpinLock.h" 36 #include <string.h> 37 38 namespace WTF { 39 40 static PartitionAllocatorGeneric gPartition; 41 static int gLock = 0; 42 static bool gInitialized = false; 43 44 void* fastZeroedMalloc(size_t n) 45 { 46 void* result = fastMalloc(n); 47 memset(result, 0, n); 48 return result; 49 } 50 51 char* fastStrDup(const char* src) 52 { 53 size_t len = strlen(src) + 1; 54 char* dup = static_cast<char*>(fastMalloc(len)); 55 memcpy(dup, src, len); 56 return dup; 57 } 58 59 void fastMallocShutdown() 60 { 61 gPartition.shutdown(); 62 } 63 64 void* fastMalloc(size_t n) 65 { 66 if (UNLIKELY(!gInitialized)) { 67 spinLockLock(&gLock); 68 if (!gInitialized) { 69 gInitialized = true; 70 gPartition.init(); 71 } 72 spinLockUnlock(&gLock); 73 } 74 return partitionAllocGeneric(gPartition.root(), n); 75 } 76 77 void fastFree(void* p) 78 { 79 partitionFreeGeneric(gPartition.root(), p); 80 } 81 82 void* fastRealloc(void* p, size_t n) 83 { 84 return partitionReallocGeneric(gPartition.root(), p, n); 85 } 86 87 } // namespace WTF 88