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1 // Copyright (c) 2005, Google Inc. | 1 // Copyright (c) 2005, 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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34 // to use malloc-hook inside the tcmalloc system. It does not hold | 34 // to use malloc-hook inside the tcmalloc system. It does not hold |
35 // any of the client-facing calls that are used to add new hooks. | 35 // any of the client-facing calls that are used to add new hooks. |
36 | 36 |
37 #ifndef _MALLOC_HOOK_INL_H_ | 37 #ifndef _MALLOC_HOOK_INL_H_ |
38 #define _MALLOC_HOOK_INL_H_ | 38 #define _MALLOC_HOOK_INL_H_ |
39 | 39 |
40 #include <stddef.h> | 40 #include <stddef.h> |
41 #include <sys/types.h> | 41 #include <sys/types.h> |
42 #include "base/atomicops.h" | 42 #include "base/atomicops.h" |
43 #include "base/basictypes.h" | 43 #include "base/basictypes.h" |
44 #include <gperftools/malloc_hook.h> | 44 #include <google/malloc_hook.h> |
45 | 45 |
46 namespace base { namespace internal { | 46 namespace base { namespace internal { |
47 | 47 |
48 // The following (implementation) code is DEPRECATED. | 48 // The following (implementation) code is DEPRECATED. |
49 // A simple atomic pointer class that can be initialized by the linker | 49 // A simple atomic pointer class that can be initialized by the linker |
50 // when you define a namespace-scope variable as: | 50 // when you define a namespace-scope variable as: |
51 // | 51 // |
52 // AtomicPtr<Foo*> my_global = { &initial_value }; | 52 // AtomicPtr<Foo*> my_global = { &initial_value }; |
53 // | 53 // |
54 // This isn't suitable for a general atomic<> class because of the | 54 // This isn't suitable for a general atomic<> class because of the |
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97 extern AtomicPtr<MallocHook::PreSbrkHook> presbrk_hook_; | 97 extern AtomicPtr<MallocHook::PreSbrkHook> presbrk_hook_; |
98 extern AtomicPtr<MallocHook::SbrkHook> sbrk_hook_; | 98 extern AtomicPtr<MallocHook::SbrkHook> sbrk_hook_; |
99 // End DEPRECATED code. | 99 // End DEPRECATED code. |
100 | 100 |
101 // Maximum of 7 hooks means that HookList is 8 words. | 101 // Maximum of 7 hooks means that HookList is 8 words. |
102 static const int kHookListMaxValues = 7; | 102 static const int kHookListMaxValues = 7; |
103 | 103 |
104 // HookList: a class that provides synchronized insertions and removals and | 104 // HookList: a class that provides synchronized insertions and removals and |
105 // lockless traversal. Most of the implementation is in malloc_hook.cc. | 105 // lockless traversal. Most of the implementation is in malloc_hook.cc. |
106 template <typename T> | 106 template <typename T> |
107 struct PERFTOOLS_DLL_DECL HookList { | 107 struct HookList { |
108 COMPILE_ASSERT(sizeof(T) <= sizeof(AtomicWord), T_should_fit_in_AtomicWord); | 108 COMPILE_ASSERT(sizeof(T) <= sizeof(AtomicWord), T_should_fit_in_AtomicWord); |
109 | 109 |
110 // Adds value to the list. Note that duplicates are allowed. Thread-safe and | 110 // Adds value to the list. Note that duplicates are allowed. Thread-safe and |
111 // blocking (acquires hooklist_spinlock). Returns true on success; false | 111 // blocking (acquires hooklist_spinlock). Returns true on success; false |
112 // otherwise (failures include invalid value and no space left). | 112 // otherwise (failures include invalid value and no space left). |
113 bool Add(T value); | 113 bool Add(T value); |
114 | 114 |
115 // Removes the first entry matching value from the list. Thread-safe and | 115 // Removes the first entry matching value from the list. Thread-safe and |
116 // blocking (acquires hooklist_spinlock). Returns true on success; false | 116 // blocking (acquires hooklist_spinlock). Returns true on success; false |
117 // otherwise (failures include invalid value and no value found). | 117 // otherwise (failures include invalid value and no value found). |
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313 if (!base::internal::sbrk_hooks_.empty() && increment != 0) { | 313 if (!base::internal::sbrk_hooks_.empty() && increment != 0) { |
314 InvokeSbrkHookSlow(result, increment); | 314 InvokeSbrkHookSlow(result, increment); |
315 } | 315 } |
316 // The following code is DEPRECATED. | 316 // The following code is DEPRECATED. |
317 MallocHook::SbrkHook hook = MallocHook::GetSbrkHook(); | 317 MallocHook::SbrkHook hook = MallocHook::GetSbrkHook(); |
318 if (hook != NULL && increment != 0) (*hook)(result, increment); | 318 if (hook != NULL && increment != 0) (*hook)(result, increment); |
319 // End DEPRECATED code. | 319 // End DEPRECATED code. |
320 } | 320 } |
321 | 321 |
322 #endif /* _MALLOC_HOOK_INL_H_ */ | 322 #endif /* _MALLOC_HOOK_INL_H_ */ |
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