1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_ALLOCATOR_ALLOCATOR_EXTENSION_H_ 6 #define BASE_ALLOCATOR_ALLOCATOR_EXTENSION_H_ 7 8 #include <stddef.h> // for size_t 9 10 #include "base/base_export.h" 11 #include "build/build_config.h" 12 13 namespace base { 14 namespace allocator { 15 16 typedef void (*ReleaseFreeMemoryFunction)(); 17 typedef bool (*GetNumericPropertyFunction)(const char* name, size_t* value); 18 19 // Request that the allocator release any free memory it knows about to the 20 // system. 21 BASE_EXPORT void ReleaseFreeMemory(); 22 23 // Get the named property's |value|. Returns true if the property is known. 24 // Returns false if the property is not a valid property name for the current 25 // allocator implementation. 26 // |name| or |value| cannot be NULL 27 BASE_EXPORT bool GetNumericProperty(const char* name, size_t* value); 28 29 // These settings allow specifying a callback used to implement the allocator 30 // extension functions. These are optional, but if set they must only be set 31 // once. These will typically called in an allocator-specific initialization 32 // routine. 33 // 34 // No threading promises are made. The caller is responsible for making sure 35 // these pointers are set before any other threads attempt to call the above 36 // functions. 37 38 BASE_EXPORT void SetReleaseFreeMemoryFunction( 39 ReleaseFreeMemoryFunction release_free_memory_function); 40 41 BASE_EXPORT void SetGetNumericPropertyFunction( 42 GetNumericPropertyFunction get_numeric_property_function); 43 44 } // namespace allocator 45 } // namespace base 46 47 #endif // BASE_ALLOCATOR_ALLOCATOR_EXTENSION_H_ 48
