41 lines
1.4 KiB
C
41 lines
1.4 KiB
C
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#pragma once
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#include <wrl/client.h>
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#include <ppl.h>
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#include <ppltasks.h>
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namespace DX
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{
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inline void ThrowIfFailed(HRESULT hr)
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{
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if (FAILED(hr))
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{
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// Set a breakpoint on this line to catch Win32 API errors.
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throw Platform::Exception::CreateException(hr);
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}
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}
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// Function that reads from a binary file asynchronously.
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inline Concurrency::task<Platform::Array<byte>^> ReadDataAsync(Platform::String^ filename)
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{
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using namespace Windows::Storage;
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using namespace Concurrency;
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auto folder = Windows::ApplicationModel::Package::Current->InstalledLocation;
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return create_task(folder->GetFileAsync(filename)).then([] (StorageFile^ file)
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{
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return file->OpenReadAsync();
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}).then([] (Streams::IRandomAccessStreamWithContentType^ stream)
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{
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unsigned int bufferSize = static_cast<unsigned int>(stream->Size);
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auto fileBuffer = ref new Streams::Buffer(bufferSize);
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return stream->ReadAsync(fileBuffer, bufferSize, Streams::InputStreamOptions::None);
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}).then([] (Streams::IBuffer^ fileBuffer) -> Platform::Array<byte>^
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{
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auto fileData = ref new Platform::Array<byte>(fileBuffer->Length);
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Streams::DataReader::FromBuffer(fileBuffer)->ReadBytes(fileData);
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return fileData;
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});
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}
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}
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