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// Copyright Epic Games, Inc. All Rights Reserved.
#include "hordetransport.h"
#include <zencore/logging.h>
#include <zencore/trace.h>
ZEN_THIRD_PARTY_INCLUDES_START
#include <asio.hpp>
ZEN_THIRD_PARTY_INCLUDES_END
#if ZEN_PLATFORM_WINDOWS
# undef SendMessage
#endif
namespace zen::horde {
// ComputeTransport base
bool
ComputeTransport::SendMessage(const void* Data, size_t Size)
{
const uint8_t* Ptr = static_cast<const uint8_t*>(Data);
size_t Remaining = Size;
while (Remaining > 0)
{
const size_t Sent = Send(Ptr, Remaining);
if (Sent == 0)
{
return false;
}
Ptr += Sent;
Remaining -= Sent;
}
return true;
}
bool
ComputeTransport::RecvMessage(void* Data, size_t Size)
{
uint8_t* Ptr = static_cast<uint8_t*>(Data);
size_t Remaining = Size;
while (Remaining > 0)
{
const size_t Received = Recv(Ptr, Remaining);
if (Received == 0)
{
return false;
}
Ptr += Received;
Remaining -= Received;
}
return true;
}
// TcpComputeTransport - ASIO pimpl
struct TcpComputeTransport::Impl
{
asio::io_context IoContext;
asio::ip::tcp::socket Socket;
Impl() : Socket(IoContext) {}
};
// Uses ASIO in synchronous mode only — no async operations or io_context::run().
// The io_context is only needed because ASIO sockets require one to be constructed.
TcpComputeTransport::TcpComputeTransport(const MachineInfo& Info)
: m_Impl(std::make_unique<Impl>())
, m_Log(zen::logging::Get("horde.transport"))
{
ZEN_TRACE_CPU("TcpComputeTransport::Connect");
asio::error_code Ec;
const asio::ip::address Address = asio::ip::make_address(Info.GetConnectionAddress(), Ec);
if (Ec)
{
ZEN_WARN("invalid address '{}': {}", Info.GetConnectionAddress(), Ec.message());
m_HasErrors = true;
return;
}
const asio::ip::tcp::endpoint Endpoint(Address, Info.GetConnectionPort());
m_Impl->Socket.connect(Endpoint, Ec);
if (Ec)
{
ZEN_WARN("failed to connect to Horde compute [{}:{}]: {}", Info.GetConnectionAddress(), Info.GetConnectionPort(), Ec.message());
m_HasErrors = true;
return;
}
// Disable Nagle's algorithm for lower latency
m_Impl->Socket.set_option(asio::ip::tcp::no_delay(true), Ec);
}
TcpComputeTransport::~TcpComputeTransport()
{
Close();
}
bool
TcpComputeTransport::IsValid() const
{
return m_Impl && m_Impl->Socket.is_open() && !m_HasErrors && !m_IsClosed;
}
size_t
TcpComputeTransport::Send(const void* Data, size_t Size)
{
if (!IsValid())
{
return 0;
}
asio::error_code Ec;
const size_t Sent = m_Impl->Socket.send(asio::buffer(Data, Size), 0, Ec);
if (Ec)
{
m_HasErrors = true;
return 0;
}
return Sent;
}
size_t
TcpComputeTransport::Recv(void* Data, size_t Size)
{
if (!IsValid())
{
return 0;
}
asio::error_code Ec;
const size_t Received = m_Impl->Socket.receive(asio::buffer(Data, Size), 0, Ec);
if (Ec)
{
return 0;
}
return Received;
}
void
TcpComputeTransport::MarkComplete()
{
}
void
TcpComputeTransport::Close()
{
if (!m_IsClosed && m_Impl && m_Impl->Socket.is_open())
{
asio::error_code Ec;
m_Impl->Socket.shutdown(asio::ip::tcp::socket::shutdown_both, Ec);
m_Impl->Socket.close(Ec);
}
m_IsClosed = true;
}
} // namespace zen::horde
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