84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
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/*
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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 "webrtc/system_wrappers/include/aligned_malloc.h"
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#include <memory>
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#if _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 "testing/gtest/include/gtest/gtest.h"
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#include "webrtc/typedefs.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 = reinterpret_cast<const char*>(
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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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