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#include <msgpack.hpp>
#include <iostream>
#include <stdexcept>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <pthread.h>
class Server {
public:
Server(int sock) : m_sock(sock) { }
~Server() { }
typedef std::auto_ptr<msgpack::zone> auto_zone;
void socket_readable()
{
m_pac.reserve_buffer(1024);
ssize_t count =
read(m_sock, m_pac.buffer(), m_pac.buffer_capacity());
if(count < 0) {
if(errno == EAGAIN || errno == EINTR) {
return;
} else {
throw std::runtime_error(strerror(errno));
}
} else if(count == 0) {
throw std::runtime_error("connection closed");
}
m_pac.buffer_consumed(count);
while(m_pac.execute()) {
msgpack::object msg = m_pac.data();
auto_zone life( m_pac.release_zone() );
m_pac.reset();
process_message(msg, life);
}
}
private:
void process_message(msgpack::object msg, auto_zone& life)
{
std::cout << "message reached: " << msg << std::endl;
}
private:
int m_sock;
msgpack::unpacker m_pac;
};
static void* run_server(void* arg)
try {
Server* srv = reinterpret_cast<Server*>(arg);
while(true) {
srv->socket_readable();
}
return NULL;
} catch (std::exception& e) {
std::cerr << "error while processing client packet: "
<< e.what() << std::endl;
return NULL;
} catch (...) {
std::cerr << "error while processing client packet: "
<< "unknown error" << std::endl;
return NULL;
}
struct fwriter {
fwriter(int fd) : m_fp( fdopen(fd, "w") ) { }
void write(const char* buf, size_t buflen)
{
size_t count = fwrite(buf, buflen, 1, m_fp);
if(count < 1) {
std::cout << buflen << std::endl;
std::cout << count << std::endl;
throw std::runtime_error(strerror(errno));
}
}
void flush() { fflush(m_fp); }
void close() { fclose(m_fp); }
private:
FILE* m_fp;
};
int main(void)
{
int pair[2];
pipe(pair);
// run server thread
Server srv(pair[0]);
pthread_t thread;
pthread_create(&thread, NULL,
run_server, reinterpret_cast<void*>(&srv));
// client thread:
fwriter writer(pair[1]);
typedef msgpack::type::tuple<std::string, std::string, std::string> put_t;
typedef msgpack::type::tuple<std::string, std::string> get_t;
put_t req1("put", "apple", "red");
put_t req2("put", "lemon", "yellow");
get_t req3("get", "apple");
msgpack::pack(writer, req1);
msgpack::pack(writer, req2);
msgpack::pack(writer, req3);
writer.flush();
writer.close();
pthread_join(thread, NULL);
}
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