| 1 | /*++ |
| 2 | |
| 3 | Copyright (c) Microsoft. All rights reserved. |
| 4 | |
| 5 | Module Name: |
| 6 | |
| 7 | Streams.cpp |
| 8 | |
| 9 | Abstract: |
| 10 | |
| 11 | This file contains the implementation of WinRT wrappers for streams. |
| 12 | |
| 13 | --*/ |
| 14 | |
| 15 | #include "precomp.h" |
| 16 | #include "Streams.h" |
| 17 | |
| 18 | using namespace winrt::Windows::Foundation; |
| 19 | using namespace winrt::Windows::Storage::Streams; |
| 20 | |
| 21 | namespace winrt::Microsoft::WSL::Containers::implementation { |
| 22 | |
| 23 | IOHandleInputStream::IOHandleInputStream(wil::unique_handle&& handle) : m_handle(std::move(handle)) |
| 24 | { |
| 25 | } |
| 26 | |
| 27 | IAsyncOperationWithProgress<IBuffer, uint32_t> IOHandleInputStream::ReadAsync(IBuffer buffer, uint32_t count, InputStreamOptions options) |
| 28 | { |
| 29 | if (!m_handle) |
| 30 | { |
| 31 | throw winrt::hresult_illegal_method_call(L"Stream is closed"); |
| 32 | } |
| 33 | |
| 34 | if (options != InputStreamOptions::None) |
| 35 | { |
| 36 | throw winrt::hresult_error(HRESULT_FROM_WIN32(ERROR_NOT_SUPPORTED), L"Only InputStreamOptions::None is supported"); |
| 37 | } |
| 38 | |
| 39 | if (buffer == nullptr) |
| 40 | { |
| 41 | throw winrt::hresult_error(E_POINTER, L"Buffer cannot be null"); |
| 42 | } |
| 43 | |
| 44 | if (count > buffer.Capacity()) |
| 45 | { |
| 46 | throw winrt::hresult_error(E_BOUNDS, L"Count cannot be greater than the buffer capacity"); |
| 47 | } |
| 48 | |
| 49 | // Move to a background thread, ensuring that this object stays alive until the async operation completes. |
| 50 | auto self = get_strong(); |
| 51 | co_await winrt::resume_background(); |
| 52 | |
| 53 | DWORD bytesRead = 0; |
| 54 | if (!ReadFile(self->m_handle.get(), buffer.data(), count, &bytesRead, nullptr)) |
| 55 | { |
| 56 | const auto error = GetLastError(); |
| 57 | if (error == ERROR_BROKEN_PIPE) |
| 58 | { |
| 59 | bytesRead = 0; |
| 60 | } |
| 61 | else |
| 62 | { |
| 63 | THROW_WIN32(error); |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | buffer.Length(bytesRead); |
| 68 | co_return buffer; |
| 69 | } |
| 70 | |
| 71 | void IOHandleInputStream::Close() |
| 72 | { |
| 73 | m_handle.reset(); |
| 74 | } |
| 75 | |
| 76 | IOHandleOutputStream::IOHandleOutputStream(wil::unique_handle&& handle) : m_handle(std::move(handle)) |
| 77 | { |
| 78 | } |
| 79 | |
| 80 | IAsyncOperationWithProgress<uint32_t, uint32_t> IOHandleOutputStream::WriteAsync(IBuffer const& buffer) |
| 81 | { |
| 82 | if (!m_handle) |
| 83 | { |
| 84 | throw winrt::hresult_illegal_method_call(L"Stream is closed"); |
| 85 | } |
| 86 | |
| 87 | // Move to a background thread, ensuring that this object stays alive until the async operation completes. |
| 88 | auto self = get_strong(); |
| 89 | co_await winrt::resume_background(); |
| 90 | |
| 91 | DWORD bytesWritten = 0; |
| 92 | THROW_IF_WIN32_BOOL_FALSE(WriteFile(self->m_handle.get(), buffer.data(), buffer.Length(), &bytesWritten, nullptr)); |
| 93 | |
| 94 | co_return bytesWritten; |
| 95 | } |
| 96 | |
| 97 | winrt::Windows::Foundation::IAsyncOperation<bool> IOHandleOutputStream::FlushAsync() |
| 98 | { |
| 99 | if (!m_handle) |
| 100 | { |
| 101 | throw winrt::hresult_illegal_method_call(L"Stream is closed"); |
| 102 | } |
| 103 | |
| 104 | // Move to a background thread, ensuring that this object stays alive until the async operation completes. |
| 105 | auto self = get_strong(); |
| 106 | co_await winrt::resume_background(); |
| 107 | |
| 108 | THROW_IF_WIN32_BOOL_FALSE(FlushFileBuffers(self->m_handle.get())); |
| 109 | co_return true; |
| 110 | } |
| 111 | |
| 112 | void IOHandleOutputStream::Close() |
| 113 | { |
| 114 | m_handle.reset(); |
| 115 | } |
| 116 | |
| 117 | } // namespace winrt::Microsoft::WSL::Containers::implementation |