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Issue 9702045: Update the tcmalloc vendor branch to r144 (gperftools 2.0), and README.chromium. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 8 years, 9 months ago
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1 // Copyright (c) 2008, Google Inc. 1 // Copyright (c) 2008, Google Inc.
2 // All rights reserved. 2 // All rights reserved.
3 // 3 //
4 // Redistribution and use in source and binary forms, with or without 4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are 5 // modification, are permitted provided that the following conditions are
6 // met: 6 // met:
7 // 7 //
8 // * Redistributions of source code must retain the above copyright 8 // * Redistributions of source code must retain the above copyright
9 // notice, this list of conditions and the following disclaimer. 9 // notice, this list of conditions and the following disclaimer.
10 // * Redistributions in binary form must reproduce the above 10 // * Redistributions in binary form must reproduce the above
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29 29
30 // --- 30 // ---
31 // Author: Sanjay Ghemawat <opensource@google.com> 31 // Author: Sanjay Ghemawat <opensource@google.com>
32 32
33 #ifndef TCMALLOC_PAGE_HEAP_ALLOCATOR_H_ 33 #ifndef TCMALLOC_PAGE_HEAP_ALLOCATOR_H_
34 #define TCMALLOC_PAGE_HEAP_ALLOCATOR_H_ 34 #define TCMALLOC_PAGE_HEAP_ALLOCATOR_H_
35 35
36 #include <stddef.h> // for NULL, size_t 36 #include <stddef.h> // for NULL, size_t
37 37
38 #include "common.h" // for MetaDataAlloc 38 #include "common.h" // for MetaDataAlloc
39 #include "internal_logging.h" // for ASSERT, CRASH 39 #include "internal_logging.h" // for ASSERT
40 40
41 namespace tcmalloc { 41 namespace tcmalloc {
42 42
43 // Simple allocator for objects of a specified type. External locking 43 // Simple allocator for objects of a specified type. External locking
44 // is required before accessing one of these objects. 44 // is required before accessing one of these objects.
45 template <class T> 45 template <class T>
46 class PageHeapAllocator { 46 class PageHeapAllocator {
47 public: 47 public:
48 // We use an explicit Init function because these variables are statically 48 // We use an explicit Init function because these variables are statically
49 // allocated and their constructors might not have run by the time some 49 // allocated and their constructors might not have run by the time some
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63 void* result; 63 void* result;
64 if (free_list_ != NULL) { 64 if (free_list_ != NULL) {
65 result = free_list_; 65 result = free_list_;
66 free_list_ = *(reinterpret_cast<void**>(result)); 66 free_list_ = *(reinterpret_cast<void**>(result));
67 } else { 67 } else {
68 if (free_avail_ < sizeof(T)) { 68 if (free_avail_ < sizeof(T)) {
69 // Need more room. We assume that MetaDataAlloc returns 69 // Need more room. We assume that MetaDataAlloc returns
70 // suitably aligned memory. 70 // suitably aligned memory.
71 free_area_ = reinterpret_cast<char*>(MetaDataAlloc(kAllocIncrement)); 71 free_area_ = reinterpret_cast<char*>(MetaDataAlloc(kAllocIncrement));
72 if (free_area_ == NULL) { 72 if (free_area_ == NULL) {
73 CRASH("FATAL ERROR: Out of memory trying to allocate internal " 73 Log(kCrash, __FILE__, __LINE__,
74 "tcmalloc data (%d bytes, object-size %d)\n", 74 "FATAL ERROR: Out of memory trying to allocate internal "
75 kAllocIncrement, static_cast<int>(sizeof(T))); 75 "tcmalloc data (bytes, object-size)",
76 kAllocIncrement, sizeof(T));
76 } 77 }
77 free_avail_ = kAllocIncrement; 78 free_avail_ = kAllocIncrement;
78 } 79 }
79 result = free_area_; 80 result = free_area_;
80 free_area_ += sizeof(T); 81 free_area_ += sizeof(T);
81 free_avail_ -= sizeof(T); 82 free_avail_ -= sizeof(T);
82 } 83 }
83 inuse_++; 84 inuse_++;
84 return reinterpret_cast<T*>(result); 85 return reinterpret_cast<T*>(result);
85 } 86 }
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103 // Free list of already carved objects 104 // Free list of already carved objects
104 void* free_list_; 105 void* free_list_;
105 106
106 // Number of allocated but unfreed objects 107 // Number of allocated but unfreed objects
107 int inuse_; 108 int inuse_;
108 }; 109 };
109 110
110 } // namespace tcmalloc 111 } // namespace tcmalloc
111 112
112 #endif // TCMALLOC_PAGE_HEAP_ALLOCATOR_H_ 113 #endif // TCMALLOC_PAGE_HEAP_ALLOCATOR_H_
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