739351d476
Change log:95336cb92b..191d55580eFull diff:95336cb92b..191d55580eRoll chromium third_party 4e16929f46..3a8f2a9e1e Change log:4e16929f46..3a8f2a9e1eChanged dependencies: * src/tools:c44a3f5eca..f524a53b81DEPS diff:95336cb92b..191d55580e/DEPS No update to Clang. TBR=titovartem@google.com, BUG=None CQ_INCLUDE_TRYBOTS=master.internal.tryserver.corp.webrtc:linux_internal Change-Id: Ic9c4a62b050383646e9fcf5cc07a5653c14ac06e Reviewed-on: https://webrtc-review.googlesource.com/76120 Reviewed-by: Patrik Höglund <phoglund@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Reviewed-by: Artem Titov <titovartem@webrtc.org> Commit-Queue: Artem Titov <titovartem@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23205}
78 lines
3.4 KiB
C++
78 lines
3.4 KiB
C++
// Copyright (c) 2005, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// ---
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// Author: Sanjay Ghemawat
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//
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// Routine that uses sbrk/mmap to allocate memory from the system.
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// Useful for implementing malloc.
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#ifndef TCMALLOC_SYSTEM_ALLOC_H_
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#define TCMALLOC_SYSTEM_ALLOC_H_
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#include <config.h>
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#include <stddef.h> // for size_t
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class SysAllocator;
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// REQUIRES: "alignment" is a power of two or "0" to indicate default alignment
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//
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// Allocate and return "N" bytes of zeroed memory.
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//
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// If actual_bytes is NULL then the returned memory is exactly the
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// requested size. If actual bytes is non-NULL then the allocator
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// may optionally return more bytes than asked for (i.e. return an
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// entire "huge" page if a huge page allocator is in use).
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//
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// The returned pointer is a multiple of "alignment" if non-zero. The
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// returned pointer will always be aligned suitably for holding a
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// void*, double, or size_t. In addition, if this platform defines
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// CACHELINE_ALIGNED, the return pointer will always be cacheline
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// aligned.
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//
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// Returns NULL when out of memory.
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extern void* TCMalloc_SystemAlloc(size_t bytes, size_t *actual_bytes,
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size_t alignment = 0);
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// This call is a hint to the operating system that the pages
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// contained in the specified range of memory will not be used for a
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// while, and can be released for use by other processes or the OS.
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// Pages which are released in this way may be destroyed (zeroed) by
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// the OS. The benefit of this function is that it frees memory for
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// use by the system, the cost is that the pages are faulted back into
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// the address space next time they are touched, which can impact
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// performance. (Only pages fully covered by the memory region will
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// be released, partial pages will not.)
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extern void TCMalloc_SystemRelease(void* start, size_t length);
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// The current system allocator.
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extern PERFTOOLS_DLL_DECL SysAllocator* sys_alloc;
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#endif /* TCMALLOC_SYSTEM_ALLOC_H_ */
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