60 lines
2.1 KiB
C++
60 lines
2.1 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_ALLOCATOR_ALLOCATOR_EXTENSION_H
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#define BASE_ALLOCATOR_ALLOCATOR_EXTENSION_H
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#include <stddef.h> // for size_t
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#include "base/allocator/allocator_extension_thunks.h"
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#include "base/base_export.h"
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#include "build/build_config.h"
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namespace base {
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namespace allocator {
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// Request the allocator to report value of its waste memory size.
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// Waste size corresponds to memory that has been allocated from the OS but
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// not passed up to the application. It e.g. includes memory retained by free
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// lists, internal data, chunks padding, etc.
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//
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// |size| pointer to the returned value, must be not NULL.
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// Returns true if the value has been returned, false otherwise.
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BASE_EXPORT bool GetAllocatorWasteSize(size_t* size);
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// Request that the allocator print a human-readable description of the current
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// state of the allocator into a null-terminated string in the memory segment
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// buffer[0,buffer_length-1].
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//
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// |buffer| must point to a valid piece of memory
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// |buffer_length| must be > 0.
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BASE_EXPORT void GetStats(char* buffer, int buffer_length);
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// Request that the allocator release any free memory it knows about to the
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// system.
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BASE_EXPORT void ReleaseFreeMemory();
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// These settings allow specifying a callback used to implement the allocator
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// extension functions. These are optional, but if set they must only be set
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// once. These will typically called in an allocator-specific initialization
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// routine.
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//
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// No threading promises are made. The caller is responsible for making sure
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// these pointers are set before any other threads attempt to call the above
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// functions.
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BASE_EXPORT void SetGetAllocatorWasteSizeFunction(
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thunks::GetAllocatorWasteSizeFunction get_allocator_waste_size_function);
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BASE_EXPORT void SetGetStatsFunction(
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thunks::GetStatsFunction get_stats_function);
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BASE_EXPORT void SetReleaseFreeMemoryFunction(
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thunks::ReleaseFreeMemoryFunction release_free_memory_function);
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} // namespace allocator
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} // namespace base
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#endif
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