mirror of
https://github.com/chromium/crashpad.git
synced 2024-12-27 15:32:10 +08:00
6278690abe
sed -i '' -E -e 's/Copyright (.+) The Crashpad Authors\. All rights reserved\.$/Copyright \1 The Crashpad Authors/' $(git grep -El 'Copyright (.+) The Crashpad Authors\. All rights reserved\.$') Bug: chromium:1098010 Change-Id: I8d6138469ddbe3d281a5d83f64cf918ec2491611 Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/3878262 Reviewed-by: Joshua Peraza <jperaza@chromium.org> Commit-Queue: Mark Mentovai <mark@chromium.org>
117 lines
3.7 KiB
C++
117 lines
3.7 KiB
C++
// Copyright 2015 The Crashpad Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#ifndef CRASHPAD_UTIL_STDLIB_ALIGNED_ALLOCATOR_H_
|
|
#define CRASHPAD_UTIL_STDLIB_ALIGNED_ALLOCATOR_H_
|
|
|
|
#include <stddef.h>
|
|
|
|
#include <limits>
|
|
#include <memory>
|
|
#include <new>
|
|
#include <utility>
|
|
#include <vector>
|
|
|
|
namespace crashpad {
|
|
|
|
//! \brief Allocates memory with the specified alignment constraint.
|
|
//!
|
|
//! This function wraps `posix_memalign()` or `_aligned_malloc()`. Memory
|
|
//! allocated by this function must be released by AlignFree().
|
|
void* AlignedAllocate(size_t alignment, size_t size);
|
|
|
|
//! \brief Frees memory allocated by AlignedAllocate().
|
|
//!
|
|
//! This function wraps `free()` or `_aligned_free()`.
|
|
void AlignedFree(void* pointer);
|
|
|
|
//! \brief A standard allocator that aligns its allocations as requested,
|
|
//! suitable for use as an allocator in standard containers.
|
|
//!
|
|
//! This is similar to `std::allocator<T>`, with the addition of an alignment
|
|
//! guarantee. \a Alignment must be a power of 2. If \a Alignment is not
|
|
//! specified, the default alignment for type \a T is used.
|
|
template <class T, size_t Alignment = alignof(T)>
|
|
struct AlignedAllocator {
|
|
public:
|
|
using value_type = T;
|
|
using pointer = T*;
|
|
using const_pointer = const T*;
|
|
using reference = T&;
|
|
using const_reference = const T&;
|
|
using size_type = size_t;
|
|
using difference_type = ptrdiff_t;
|
|
|
|
template <class U>
|
|
struct rebind {
|
|
using other = AlignedAllocator<U, Alignment>;
|
|
};
|
|
|
|
AlignedAllocator() noexcept {}
|
|
AlignedAllocator(const AlignedAllocator& other) noexcept {}
|
|
|
|
template <typename U>
|
|
AlignedAllocator(const AlignedAllocator<U, Alignment>& other) noexcept {}
|
|
|
|
~AlignedAllocator() {}
|
|
|
|
pointer address(reference x) const noexcept { return &x; }
|
|
const_pointer address(const_reference x) const noexcept { return &x; }
|
|
|
|
pointer allocate(size_type n, const void* hint = 0) {
|
|
return reinterpret_cast<pointer>(
|
|
AlignedAllocate(Alignment, sizeof(value_type) * n));
|
|
}
|
|
|
|
void deallocate(pointer p, size_type n) { AlignedFree(p); }
|
|
|
|
size_type max_size() const noexcept {
|
|
return std::numeric_limits<size_type>::max() / sizeof(value_type);
|
|
}
|
|
|
|
template <class U, class... Args>
|
|
void construct(U* p, Args&&... args) {
|
|
new (reinterpret_cast<void*>(p)) U(std::forward<Args>(args)...);
|
|
}
|
|
|
|
template <class U>
|
|
void destroy(U* p) {
|
|
p->~U();
|
|
}
|
|
};
|
|
|
|
template <class T1, class T2, size_t Alignment>
|
|
bool operator==(const AlignedAllocator<T1, Alignment>& lhs,
|
|
const AlignedAllocator<T2, Alignment>& rhs) noexcept {
|
|
return true;
|
|
}
|
|
|
|
template <class T1, class T2, size_t Alignment>
|
|
bool operator!=(const AlignedAllocator<T1, Alignment>& lhs,
|
|
const AlignedAllocator<T2, Alignment>& rhs) noexcept {
|
|
return false;
|
|
}
|
|
|
|
//! \brief A `std::vector` using AlignedAllocator.
|
|
//!
|
|
//! This is similar to `std::vector<T>`, with the addition of an alignment
|
|
//! guarantee. \a Alignment must be a power of 2. If \a Alignment is not
|
|
//! specified, the default alignment for type \a T is used.
|
|
template <typename T, size_t Alignment = alignof(T)>
|
|
using AlignedVector = std::vector<T, AlignedAllocator<T, Alignment>>;
|
|
|
|
} // namespace crashpad
|
|
|
|
#endif // CRASHPAD_UTIL_STDLIB_ALIGNED_ALLOCATOR_H_
|