mirror of
https://github.com/klzgrad/naiveproxy.git
synced 2024-11-24 22:36:09 +03:00
48 lines
1.6 KiB
C++
48 lines
1.6 KiB
C++
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style license that can be
|
||
|
|
// found in the LICENSE file.
|
||
|
|
|
||
|
|
#include "base/memory/aligned_memory.h"
|
||
|
|
|
||
|
|
#include "base/logging.h"
|
||
|
|
#include "build/build_config.h"
|
||
|
|
|
||
|
|
#if defined(OS_ANDROID)
|
||
|
|
#include <malloc.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace base {
|
||
|
|
|
||
|
|
void* AlignedAlloc(size_t size, size_t alignment) {
|
||
|
|
DCHECK_GT(size, 0U);
|
||
|
|
DCHECK_EQ(alignment & (alignment - 1), 0U);
|
||
|
|
DCHECK_EQ(alignment % sizeof(void*), 0U);
|
||
|
|
void* ptr = nullptr;
|
||
|
|
#if defined(COMPILER_MSVC)
|
||
|
|
ptr = _aligned_malloc(size, alignment);
|
||
|
|
// Android technically supports posix_memalign(), but does not expose it in
|
||
|
|
// the current version of the library headers used by Chrome. Luckily,
|
||
|
|
// memalign() on Android returns pointers which can safely be used with
|
||
|
|
// free(), so we can use it instead. Issue filed to document this:
|
||
|
|
// http://code.google.com/p/android/issues/detail?id=35391
|
||
|
|
#elif defined(OS_ANDROID)
|
||
|
|
ptr = memalign(alignment, size);
|
||
|
|
#else
|
||
|
|
if (posix_memalign(&ptr, alignment, size))
|
||
|
|
ptr = nullptr;
|
||
|
|
#endif
|
||
|
|
// Since aligned allocations may fail for non-memory related reasons, force a
|
||
|
|
// crash if we encounter a failed allocation; maintaining consistent behavior
|
||
|
|
// with a normal allocation failure in Chrome.
|
||
|
|
if (!ptr) {
|
||
|
|
DLOG(ERROR) << "If you crashed here, your aligned allocation is incorrect: "
|
||
|
|
<< "size=" << size << ", alignment=" << alignment;
|
||
|
|
CHECK(false);
|
||
|
|
}
|
||
|
|
// Sanity check alignment just to be safe.
|
||
|
|
DCHECK_EQ(reinterpret_cast<uintptr_t>(ptr) & (alignment - 1), 0U);
|
||
|
|
return ptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace base
|