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Link.cpp
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196 lines (143 loc) · 5.63 KB
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include <SFNUL/Link.hpp>
#include <SFNUL/Endpoint.hpp>
#include <SFNUL/Synchronizer.hpp>
#include <SFNUL/Message.hpp>
#include <cassert>
namespace sfn {
void LinkBase::Connect( const Endpoint& endpoint ) {
GetInternalTransport()->Connect( endpoint );
}
void LinkBase::Shutdown() {
GetInternalTransport()->Shutdown();
}
bool LinkBase::LocalHasShutdown() const {
return GetInternalTransport()->LocalHasShutdown();
}
bool LinkBase::RemoteHasShutdown() const {
return GetInternalTransport()->RemoteHasShutdown();
}
bool LinkBase::IsConnected() const {
return GetInternalTransport()->IsConnected();
}
void LinkBase::Close() {
GetInternalTransport()->Close();
m_segment_active = false;
}
Endpoint LinkBase::GetLocalEndpoint() const {
return GetInternalTransport()->GetLocalEndpoint();
}
Endpoint LinkBase::GetRemoteEndpoint() const {
return GetInternalTransport()->GetRemoteEndpoint();
}
bool LinkBase::Send( const void* data, std::size_t size ) {
return Send( 0, data, size );
}
std::size_t LinkBase::Receive( void* data, std::size_t size ) {
return Receive( 0, data, size );
}
bool LinkBase::Send( const Message& message ) {
return Send( 0, message );
}
std::size_t LinkBase::Receive( Message& message ) {
return Receive( 0, message );
}
bool LinkBase::Send( stream_id_type stream_id, const void* data, std::size_t size ) {
auto segment_size = static_cast<segment_size_type>( size );
std::vector<char> data_block( size + sizeof( stream_id ) + sizeof( segment_size ) );
// Send stream id.
std::memcpy( data_block.data(), &stream_id, sizeof( stream_id ) );
// Send segment size.
std::memcpy( data_block.data() + sizeof( stream_id ), &segment_size, sizeof( segment_size ) );
// Send segment data.
std::memcpy( data_block.data() + sizeof( stream_id ) + sizeof( segment_size ), data, size );
return GetInternalTransport()->Send( data_block.data(), data_block.size() );
}
std::size_t LinkBase::Receive( stream_id_type stream_id, void* data, std::size_t size ) {
if( m_segment_active && ( m_current_stream_reader != stream_id ) ) {
return 0;
}
if( !m_segment_active ) {
if( GetInternalTransport()->BytesToReceive() < sizeof( m_current_stream_reader ) + sizeof( m_segment_remaining ) ) {
return 0;
}
#if defined( SFNUL_DEBUG )
auto stream_id_received = GetInternalTransport()->Receive( &m_current_stream_reader, sizeof( m_current_stream_reader ) );
assert( stream_id_received == sizeof( m_current_stream_reader ) );
auto segment_remaining_received = GetInternalTransport()->Receive( &m_segment_remaining, sizeof( m_segment_remaining ) );
assert( segment_remaining_received == sizeof( m_segment_remaining ) );
#else
GetInternalTransport()->Receive( &m_current_stream_reader, sizeof( m_current_stream_reader ) );
GetInternalTransport()->Receive( &m_segment_remaining, sizeof( m_segment_remaining ) );
#endif
m_segment_active = true;
if( m_current_stream_reader != stream_id ) {
return 0;
}
}
auto result = GetInternalTransport()->Receive( data, std::min( size, static_cast<std::size_t>( m_segment_remaining ) ) );
m_segment_remaining -= static_cast<segment_size_type>( result );
if( !m_segment_remaining ) {
m_segment_active = false;
}
return result;
}
std::size_t LinkBase::Receive( stream_id_type stream_id, Message& message ) {
if( m_segment_active && ( m_current_stream_reader != stream_id ) ) {
return 0;
}
if( !m_segment_active ) {
if( GetInternalTransport()->BytesToReceive() < sizeof( m_current_stream_reader ) + sizeof( m_segment_remaining ) ) {
return 0;
}
#if defined( SFNUL_DEBUG )
auto stream_id_received = GetInternalTransport()->Receive( &m_current_stream_reader, sizeof( m_current_stream_reader ) );
assert( stream_id_received == sizeof( m_current_stream_reader ) );
auto segment_remaining_received = GetInternalTransport()->Receive( &m_segment_remaining, sizeof( m_segment_remaining ) );
assert( segment_remaining_received == sizeof( m_segment_remaining ) );
#else
GetInternalTransport()->Receive( &m_current_stream_reader, sizeof( m_current_stream_reader ) );
GetInternalTransport()->Receive( &m_segment_remaining, sizeof( m_segment_remaining ) );
#endif
m_segment_active = true;
if( m_current_stream_reader != stream_id ) {
return 0;
}
}
if( GetInternalTransport()->BytesToReceive() < m_segment_remaining ) {
return 0;
}
auto result = GetInternalTransport()->Receive( message );
assert( result == m_segment_remaining );
m_segment_remaining -= static_cast<segment_size_type>( result );
if( !m_segment_remaining ) {
m_segment_active = false;
}
return result;
}
bool LinkBase::Send( stream_id_type stream_id, const Message& message ) {
auto message_size = message.GetSize();
std::vector<char> data_block( sizeof( message_size ) + message_size );
std::memcpy( &data_block[0], &message_size, sizeof( message_size ) );
if( message_size ) {
const auto& message_data = message.GetBuffer();
std::copy( std::begin( message_data ), std::end( message_data ), std::begin( data_block ) + sizeof( message_size ) );
}
return Send( stream_id, &data_block[0], sizeof( message_size ) + static_cast<std::size_t>( message_size ) );
}
/// @cond
void LinkBase::SetInternalSocket( void* /*internal_socket*/ ) {
}
/// @endcond
void LinkBase::ClearBuffers() {
return GetInternalTransport()->ClearBuffers();
}
std::size_t LinkBase::BytesToSend() const {
return GetInternalTransport()->BytesToSend();
}
std::size_t LinkBase::BytesToReceive() const {
return GetInternalTransport()->BytesToReceive();
}
}