jeanlemotan
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
///////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (c) Lewis Baker
|
|
// Licenced under MIT license. See LICENSE.txt for details.
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include <cppcoro/net/socket_send_to_operation.hpp>
|
|
#include <cppcoro/net/socket.hpp>
|
|
|
|
#if CPPCORO_OS_WINNT
|
|
# include "socket_helpers.hpp"
|
|
|
|
# include <WinSock2.h>
|
|
# include <WS2tcpip.h>
|
|
# include <MSWSock.h>
|
|
# include <Windows.h>
|
|
|
|
bool cppcoro::net::socket_send_to_operation_impl::try_start(
|
|
cppcoro::detail::win32_overlapped_operation_base& operation) noexcept
|
|
{
|
|
// Need to read this flag before starting the operation, otherwise
|
|
// it may be possible that the operation will complete immediately
|
|
// on another thread and then destroy the socket before we get a
|
|
// chance to read it.
|
|
const bool skipCompletionOnSuccess = m_socket.skip_completion_on_success();
|
|
|
|
SOCKADDR_STORAGE destinationAddress;
|
|
const int destinationLength = detail::ip_endpoint_to_sockaddr(
|
|
m_destination, std::ref(destinationAddress));
|
|
|
|
DWORD numberOfBytesSent = 0;
|
|
int result = ::WSASendTo(
|
|
m_socket.native_handle(),
|
|
reinterpret_cast<WSABUF*>(&m_buffer),
|
|
1, // buffer count
|
|
&numberOfBytesSent,
|
|
0, // flags
|
|
reinterpret_cast<const SOCKADDR*>(&destinationAddress),
|
|
destinationLength,
|
|
operation.get_overlapped(),
|
|
nullptr);
|
|
if (result == SOCKET_ERROR)
|
|
{
|
|
int errorCode = ::WSAGetLastError();
|
|
if (errorCode != WSA_IO_PENDING)
|
|
{
|
|
// Failed synchronously.
|
|
operation.m_errorCode = static_cast<DWORD>(errorCode);
|
|
operation.m_numberOfBytesTransferred = numberOfBytesSent;
|
|
return false;
|
|
}
|
|
}
|
|
else if (skipCompletionOnSuccess)
|
|
{
|
|
// Completed synchronously, no completion event will be posted to the IOCP.
|
|
operation.m_errorCode = ERROR_SUCCESS;
|
|
operation.m_numberOfBytesTransferred = numberOfBytesSent;
|
|
return false;
|
|
}
|
|
|
|
// Operation will complete asynchronously.
|
|
return true;
|
|
}
|
|
|
|
void cppcoro::net::socket_send_to_operation_impl::cancel(
|
|
cppcoro::detail::win32_overlapped_operation_base& operation) noexcept
|
|
{
|
|
(void)::CancelIoEx(
|
|
reinterpret_cast<HANDLE>(m_socket.native_handle()),
|
|
operation.get_overlapped());
|
|
}
|
|
|
|
#endif
|