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#include "../c++/io.hpp"
#include <iostream>
#include "echo.hpp"
saw::error_or<void> handle_echo_write(saw::io_stream& rmt_clt, saw::message& state, uint64_t tbw){
auto eov = rmt_clt.write(&state.data[state.already_written], tbw);
if(eov.is_error()){
return std::move(eov.get_error());
}
auto val = eov.get_value();
state.already_written += val;
if(state.already_written > state.already_read){
exit(-1);
}
return saw::void_t{};
}
void handle_echo_message(saw::io_stream& rmt_clt, bool& keep_running, saw::message& state){
rmt_clt.read_ready().then([&](){
for(;;){
uint64_t tbr = state.data.size() < state.already_read ? 0: state.data.size() - state.already_read;
if(tbr == 0){
exit(-1);
}
auto eov = rmt_clt.read(&state.data[state.already_read], tbr);
if(eov.is_error()){
auto& err = eov.get_error();
if(err.is_critical()){
std::cerr<<err.get_category()<<std::endl;
exit(err.get_id());
}else{
break;
}
}
auto& read_bytes = eov.get_value();
std::cout<<"Read "<<read_bytes<<" bytes"<<std::endl;
if(read_bytes == 0u){
exit(-1);
}
bool trigger_write = (state.already_read == state.already_written);
state.already_read += read_bytes;
if(state.already_read > state.data.size()){
state.already_read = state.data.size();
}
if(trigger_write){
auto eov = handle_echo_write(rmt_clt, state, state.already_read - state.already_written);
if(eov.is_error()){
auto& err = eov.get_error();
if(err.is_critical()){
std::cerr<<"After triggered write: "<<err.get_category()<<std::endl;
exit(err.get_id());
}else {
break;
}
}
}
}
}).detach();
rmt_clt.write_ready().then([&](){
for(;;){
if(state.already_read < state.already_written){
exit(-1);
}
uint64_t tbw = state.already_read - state.already_written;
if(tbw == 0){
break;
}
auto eov = handle_echo_write(rmt_clt, state, tbw);
if(eov.is_error()){
auto& err = eov.get_error();
if(err.is_critical()){
std::cerr<<err.get_category()<<std::endl;
exit(err.get_id());
}else {
break;
}
}
}
}).detach();
rmt_clt.on_read_disconnected().then([&](){
keep_running = false;
}).detach();
}
int main(){
auto eo_aio = saw::setup_async_io();
if(eo_aio.is_error()){
auto& err = eo_aio.get_error();
std::cerr<<err.get_message()<<std::endl;
return err.get_id();
}
auto& aio = eo_aio.get_value();
/**
* Make the event loop the current event loop on this thread
*/
saw::wait_scope wait_scope{aio.event_loop};
bool keep_running = true;
aio.event_port.on_signal(saw::Signal::Terminate).then([&keep_running](){
keep_running = false;
}).detach();
auto& network = aio.io->get_network();
saw::own<saw::network_address> addr = nullptr;
saw::own<saw::server> srv = nullptr;
saw::own<saw::io_stream> remote_client = nullptr;
saw::message msg_state;
std::cout<<"Starting to resolve address"<<std::endl;
/**
* Try to resolve address. If resolved
*/
network.resolve_address(saw::echo_address, saw::echo_port).then([&](auto net_addr){
std::cout<<"Resolved address"<<std::endl;
addr = std::move(net_addr);
srv = network.listen(*addr);
if(srv){
srv->accept().then([&](auto client) -> saw::error_or<void>{
if(!remote_client){
std::cout<<"Accepted client"<<std::endl;
remote_client = std::move(client);
if(remote_client){
std::cout<<"Spinning up handler"<<std::endl;
handle_echo_message(*remote_client, keep_running, msg_state);
}else{
keep_running = false;
}
}
return saw::make_error<saw::err::critical>();
}).detach();
}else{
keep_running = false;
}
}).detach([&](auto err) {
std::cout<<"Failed to resolve address: "<<err.get_category()<<":"<<err.get_message()<<std::endl;
keep_running = false;
return err;
});
std::cout<<"Entering waiting loop"<<std::endl;
wait_scope.poll();
while(keep_running){
wait_scope.wait_for(1*1000*1000);
}
std::cout<<"\n\nShutting down echo server"<<std::endl;
return 0;
}
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