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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "system_wrappers/interface/aligned_malloc.h"
#if _WIN32
#include <windows.h>
#else
#include <stdint.h>
#endif
#include "typedefs.h" // NOLINT
#include "gtest/gtest.h"
// Returns true if |size| and |alignment| are valid combinations.
bool CorrectUsage(size_t size, size_t alignment) {
webrtc::Allocator<char>::scoped_ptr_aligned scoped(
webrtc::AlignedMalloc<char>(size, alignment));
if (scoped.get() == NULL) {
return false;
}
const uintptr_t scoped_address = reinterpret_cast<uintptr_t> (scoped.get());
return 0u == scoped_address % alignment;
}
TEST(AlignedMalloc, GetRightAlign) {
const size_t size = 100;
const size_t alignment = 32;
const size_t left_missalignment = 8;
webrtc::Allocator<char>::scoped_ptr_aligned scoped(
webrtc::AlignedMalloc<char>(size, alignment));
EXPECT_TRUE(scoped.get() != NULL);
const uintptr_t aligned_address = reinterpret_cast<uintptr_t> (scoped.get());
const uintptr_t missaligned_address = aligned_address - left_missalignment;
const char* missaligned_ptr = reinterpret_cast<const char*>(
missaligned_address);
const char* realigned_ptr = webrtc::GetRightAlign(
missaligned_ptr, alignment);
EXPECT_EQ(scoped.get(), realigned_ptr);
}
TEST(AlignedMalloc, IncorrectSize) {
const size_t incorrect_size = 0;
const size_t alignment = 64;
EXPECT_FALSE(CorrectUsage(incorrect_size, alignment));
}
TEST(AlignedMalloc, IncorrectAlignment) {
const size_t size = 100;
const size_t incorrect_alignment = 63;
EXPECT_FALSE(CorrectUsage(size, incorrect_alignment));
}
TEST(AlignedMalloc, AlignTo2Bytes) {
size_t size = 100;
size_t alignment = 2;
EXPECT_TRUE(CorrectUsage(size, alignment));
}
TEST(AlignedMalloc, AlignTo32Bytes) {
size_t size = 100;
size_t alignment = 32;
EXPECT_TRUE(CorrectUsage(size, alignment));
}
TEST(AlignedMalloc, AlignTo128Bytes) {
size_t size = 100;
size_t alignment = 128;
EXPECT_TRUE(CorrectUsage(size, alignment));
}
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