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// Copyright 2017 The Dawn 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.
#include "dawn_native/metal/BufferMTL.h"
#include "dawn_native/metal/DeviceMTL.h"
#include "dawn_native/metal/ResourceUploader.h"
namespace dawn_native { namespace metal {
Buffer::Buffer(Device* device, const BufferDescriptor* descriptor)
: BufferBase(device, descriptor) {
MTLResourceOptions storageMode;
if (GetUsage() & (dawn::BufferUsageBit::MapRead | dawn::BufferUsageBit::MapWrite)) {
storageMode = MTLResourceStorageModeShared;
} else {
storageMode = MTLResourceStorageModePrivate;
}
mMtlBuffer = [device->GetMTLDevice() newBufferWithLength:GetSize() options:storageMode];
}
Buffer::~Buffer() {
[mMtlBuffer release];
mMtlBuffer = nil;
}
id<MTLBuffer> Buffer::GetMTLBuffer() {
return mMtlBuffer;
}
void Buffer::OnMapCommandSerialFinished(uint32_t mapSerial, uint32_t offset, bool isWrite) {
char* data = reinterpret_cast<char*>([mMtlBuffer contents]);
if (isWrite) {
CallMapWriteCallback(mapSerial, DAWN_BUFFER_MAP_ASYNC_STATUS_SUCCESS, data + offset);
} else {
CallMapReadCallback(mapSerial, DAWN_BUFFER_MAP_ASYNC_STATUS_SUCCESS, data + offset);
}
}
void Buffer::SetSubDataImpl(uint32_t start, uint32_t count, const uint8_t* data) {
auto* uploader = ToBackend(GetDevice())->GetResourceUploader();
uploader->BufferSubData(mMtlBuffer, start, count, data);
}
void Buffer::MapReadAsyncImpl(uint32_t serial, uint32_t start, uint32_t) {
MapRequestTracker* tracker = ToBackend(GetDevice())->GetMapTracker();
tracker->Track(this, serial, start, false);
}
void Buffer::MapWriteAsyncImpl(uint32_t serial, uint32_t start, uint32_t) {
MapRequestTracker* tracker = ToBackend(GetDevice())->GetMapTracker();
tracker->Track(this, serial, start, true);
}
void Buffer::UnmapImpl() {
// Nothing to do, Metal StorageModeShared buffers are always mapped.
}
MapRequestTracker::MapRequestTracker(Device* device) : mDevice(device) {
}
MapRequestTracker::~MapRequestTracker() {
ASSERT(mInflightRequests.Empty());
}
void MapRequestTracker::Track(Buffer* buffer,
uint32_t mapSerial,
uint32_t offset,
bool isWrite) {
Request request;
request.buffer = buffer;
request.mapSerial = mapSerial;
request.offset = offset;
request.isWrite = isWrite;
mInflightRequests.Enqueue(std::move(request), mDevice->GetPendingCommandSerial());
}
void MapRequestTracker::Tick(Serial finishedSerial) {
for (auto& request : mInflightRequests.IterateUpTo(finishedSerial)) {
request.buffer->OnMapCommandSerialFinished(request.mapSerial, request.offset,
request.isWrite);
}
mInflightRequests.ClearUpTo(finishedSerial);
}
}} // namespace dawn_native::metal
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