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// tcpserver.c - O2 over TCP check and benchmark for message passing
//
// This program works with tcpclient.c. It is a performance test
// that sends a message back and forth between a client and server.
//
#include "o2.h"
#include "stdio.h"
#include "string.h"
#include "assert.h"
#ifdef WIN32
#include "usleep.h" // special windows implementation of sleep/usleep
#else
#include <unistd.h>
#endif
// To put some weight on fast address lookup, we create N_ADDRS
// different addresses to use.
//
#define N_ADDRS 20
char *client_addresses[N_ADDRS];
int msg_count = 0;
int running = TRUE;
// this is a handler for incoming messages. It simply sends a message
// back to one of the client addresses
//
void server_test(o2_msg_data_ptr msg, const char *types,
o2_arg ** argv, int argc, void *user_data)
{
assert(argc == 1);
msg_count++;
o2_send_cmd(client_addresses[msg_count % N_ADDRS], 0, "i", msg_count);
if (msg_count % 10000 == 0) {
printf("server received %d messages\n", msg_count);
}
if (msg_count < 100) {
printf("server message %d is %d\n", msg_count, argv[0]->i32);
}
if (argv[0]->i32 == -1) {
running = FALSE;
} else {
assert(msg_count == argv[0]->i32);
}
}
int main(int argc, const char * argv[])
{
printf("Usage: tcpserver [debugflags] "
"(see o2.h for flags, use a for all)\n");
if (argc == 2) {
o2_debug_flags(argv[1]);
printf("debug flags are: %s\n", argv[1]);
}
if (argc > 2) {
printf("WARNING: o2server ignoring extra command line argments\n");
}
o2_initialize("test");
o2_service_new("server");
// add our handler for incoming messages to each server address
for (int i = 0; i < N_ADDRS; i++) {
char path[100];
sprintf(path, "/server/benchmark/%d", i);
o2_method_new(path, "i", &server_test, NULL, FALSE, TRUE);
}
// create an address for each destination so we do not have to
// do string manipulation to send a message
for (int i = 0; i < N_ADDRS; i++) {
char path[100];
sprintf(path, "!client/benchmark/%d", i);
client_addresses[i] = (char *) (O2_MALLOC(strlen(path)));
strcpy(client_addresses[i], path);
}
// we are the master clock
o2_clock_set(NULL, NULL);
// wait for client service to be discovered
while (o2_status("client") < O2_LOCAL) {
o2_poll();
usleep(2000); // 2ms
}
printf("We discovered the client at time %g.\n", o2_time_get());
// delay 1 second
double now = o2_time_get();
while (o2_time_get() < now + 1) {
o2_poll();
usleep(2000);
}
printf("Here we go! ...\ntime is %g.\n", o2_time_get());
while (running) {
o2_poll();
}
o2_finish();
sleep(1); // clean up sockets
printf("SERVER DONE\n");
return 0;
}
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