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// Copyright 2023 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <sys/mman.h>
#include <unistd.h>
#include <utility>
#include <vector>
#include "dawn/common/MutexProtected.h"
#include "dawn/tests/MockCallback.h"
#include "dawn/tests/end2end/BufferHostMappedPointerTests.h"
namespace dawn {
namespace {
class MMapBackend : public BufferHostMappedPointerTestBackend {
public:
static BufferHostMappedPointerTestBackend* GetInstance() {
static MMapBackend backend;
return &backend;
}
const char* Name() const override { return "mmap"; }
std::pair<wgpu::Buffer, void*> CreateHostMappedBuffer(
wgpu::Device device,
wgpu::BufferUsage usage,
size_t size,
std::function<void(void*)> Populate) override {
// Create a temporary file.
char filename[] = "tmpXXXXXX";
int fd = mkstemp(filename);
EXPECT_GT(fd, -1);
unlink(filename);
// Write the initial data.
std::vector<char> initialData(size);
Populate(initialData.data());
EXPECT_EQ(write(fd, initialData.data(), size), (signed)size);
// Memory map the file.
void* ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
auto UnmapMemory = [=]() {
munmap(ptr, size);
close(fd);
};
wgpu::BufferHostMappedPointer hostMappedDesc;
hostMappedDesc.pointer = ptr;
mDisposeCallback.Use([&](auto callback) {
hostMappedDesc.disposeCallback = callback->Callback();
hostMappedDesc.userdata = callback->MakeUserdata(ptr);
});
wgpu::BufferDescriptor bufferDesc;
bufferDesc.usage = usage;
bufferDesc.size = size;
bufferDesc.nextInChain = &hostMappedDesc;
wgpu::Buffer buffer = device.CreateBuffer(&bufferDesc);
if (dawn::native::CheckIsErrorForTesting(buffer.Get())) {
UnmapMemory();
} else {
mDisposeCallback.Use([&](auto callback) {
EXPECT_CALL(*callback, Call(ptr)).WillOnce(testing::InvokeWithoutArgs(UnmapMemory));
});
}
return std::make_pair(std::move(buffer), hostMappedDesc.pointer);
}
private:
MutexProtected<testing::MockCallback<WGPUCallback>> mDisposeCallback;
};
DAWN_INSTANTIATE_PREFIXED_TEST_P(Posix,
BufferHostMappedPointerTests,
{MetalBackend(), VulkanBackend()},
{MMapBackend::GetInstance()});
} // anonymous namespace
} // namespace dawn