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96e3b991da
Bug: webrtc:12338 Change-Id: I72fcb505a92f03b2ace7160ee33d555a977eddfd Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/226955 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Artem Titov <titovartem@webrtc.org> Cr-Commit-Position: refs/heads/master@{#34587}
81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "rtc_base/memory/aligned_malloc.h"
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#include <memory>
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#ifdef _WIN32
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#include <windows.h>
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#else
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#include <stdint.h>
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#endif
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#include "test/gtest.h"
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namespace webrtc {
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// Returns true if `size` and `alignment` are valid combinations.
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bool CorrectUsage(size_t size, size_t alignment) {
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std::unique_ptr<char, AlignedFreeDeleter> scoped(
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static_cast<char*>(AlignedMalloc(size, alignment)));
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if (scoped.get() == NULL) {
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return false;
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}
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const uintptr_t scoped_address = reinterpret_cast<uintptr_t>(scoped.get());
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return 0u == scoped_address % alignment;
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}
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TEST(AlignedMalloc, GetRightAlign) {
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const size_t size = 100;
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const size_t alignment = 32;
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const size_t left_misalignment = 1;
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std::unique_ptr<char, AlignedFreeDeleter> scoped(
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static_cast<char*>(AlignedMalloc(size, alignment)));
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EXPECT_TRUE(scoped.get() != NULL);
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const uintptr_t aligned_address = reinterpret_cast<uintptr_t>(scoped.get());
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const uintptr_t misaligned_address = aligned_address - left_misalignment;
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const char* misaligned_ptr =
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reinterpret_cast<const char*>(misaligned_address);
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const char* realigned_ptr = GetRightAlign(misaligned_ptr, alignment);
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EXPECT_EQ(scoped.get(), realigned_ptr);
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}
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TEST(AlignedMalloc, IncorrectSize) {
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const size_t incorrect_size = 0;
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const size_t alignment = 64;
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EXPECT_FALSE(CorrectUsage(incorrect_size, alignment));
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}
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TEST(AlignedMalloc, IncorrectAlignment) {
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const size_t size = 100;
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const size_t incorrect_alignment = 63;
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EXPECT_FALSE(CorrectUsage(size, incorrect_alignment));
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}
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TEST(AlignedMalloc, AlignTo2Bytes) {
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size_t size = 100;
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size_t alignment = 2;
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EXPECT_TRUE(CorrectUsage(size, alignment));
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}
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TEST(AlignedMalloc, AlignTo32Bytes) {
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size_t size = 100;
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size_t alignment = 32;
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EXPECT_TRUE(CorrectUsage(size, alignment));
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}
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TEST(AlignedMalloc, AlignTo128Bytes) {
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size_t size = 100;
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size_t alignment = 128;
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EXPECT_TRUE(CorrectUsage(size, alignment));
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}
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} // namespace webrtc
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