int main(int argc, char* argv[])
{
puts("args: path/to/obj path/to/bmp");
FILE* const fobj =
oload(argc == 3 ? argv[1] : "model/salesman.obj");
SDL_Surface* const fdif =
sload(argc == 3 ? argv[2] : "model/salesman.bmp");
const Obj obj = oparse(fobj);
const Triangles tv = tvgen(obj); // Triangle Vertices.
const Triangles tt = ttgen(obj); // Triangle Textures.
const Triangles tn = tngen(obj); // Triangle Normals.
const Sdl sdl = ssetup(800, 600);
float* const zbuff = (float*) malloc(sizeof(float) * sdl.xres * sdl.yres);
for(Input input = iinit(); !input.done; input = ipump(input))
{
uint32_t* const pixel = slock(sdl);
reset(zbuff, pixel, sdl.xres * sdl.yres);
const Vertex center = { 0.0f, 0.0f, 0.0f };
const Vertex upward = { 0.0f, 1.0f, 0.0f };
const Vertex eye = { sinf(input.xt), sinf(input.yt), cosf(input.xt) };
const Vertex z = vunit(vsub(eye, center));
const Vertex x = vunit(vcross(upward, z));
const Vertex y = vcross(z, x);
for(int i = 0; i < tv.count; i++)
{
const Triangle nrm = tviewnrm(tn.triangle[i], x, y, z);
const Triangle tex = tt.triangle[i];
const Triangle tri = tviewtri(tv.triangle[i], x, y, z, eye);
const Triangle per = tperspective(tri);
const Triangle vew = tviewport(per, sdl);
const Target target = { vew, nrm, tex, fdif };
tdraw(sdl.yres, pixel, zbuff, target);
}
sunlock(sdl);
schurn(sdl);
spresent(sdl);
}
// Let the OS free hoisted memory for a quick exit.
return 0;
}
int
main(int argc, char **argv)
{
FILE *f;
const int on = 1;
int n, cpn, nth;
socklen_t len;
pthread_t tid;
sigset_t set;
struct addrinfo hints, *res, *reskeep;
struct rpack_t **rnew, **rold;
struct spdb_t *snew, *sold;
struct sigaction disp;
openlog(argv[0], LOG_CONS | LOG_NDELAY | LOG_PERROR, LOG_LOCAL0);
if (argc < 3) {
fprintf(stderr, "\nUsage: %s <Listening_IP> <default_host_to_redirect_to>\n\n", argv[0]);
_exit(1);
}
daemonize();
defhost = argv[2];
defholen = strlen(defhost);
if ( (errno = pthread_rwlock_init(&cfglock, NULL)) != 0) {
syslog(LOG_CRIT, "rwlock_init_main: %m");
_exit(1);
}
// Signal configuration for seamless config updates
bzero(&disp, sizeof(disp));
disp.sa_handler = SIG_IGN;
if (sigaction(SIGHUP, &disp, NULL) < 0) {
syslog(LOG_CRIT, "sigaction_main: %m");
_exit(1);
}
sigemptyset(&set);
sigaddset(&set, SIGHUP);
if ( (errno = pthread_sigmask(SIG_BLOCK, &set, NULL)) != 0) {
syslog(LOG_CRIT, "sigmask_main: %m");
_exit(1);
}
// Confirming CPU cores
cpn = sysconf(_SC_NPROCESSORS_ONLN); //may not be standard(?)
if (cpn < 2) syslog(LOG_ERR, "_SC_NPROCESSORS_ONLN couldn't be retrieved, using: %d", (cpn = CPUNUM));
else syslog(LOG_INFO, "available CPU cores: %d", cpn);
// Loading SPFILE
if ( (spil = sload()) == NULL) {
syslog(LOG_CRIT, "streaming points could not be loaded: %s", SPFILE);
_exit(1);
}
// WEB server section
if ( (wcut = rload(WRANGE)) != NULL) {
/* Opening up listening socket: IP from command line + PRTWEB */
bzero(&hints, sizeof(hints));
hints.ai_flags = AI_PASSIVE;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
if ( (n = getaddrinfo(argv[1], PRTWEB, &hints, &res)) != 0) {
syslog(LOG_CRIT, "getaddrinfo_web_main: %s", gai_strerror(n));
_exit(1);
}
reskeep = res;
n = BUFWEB;
do {
if ( (lifd = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) < 0) continue;
if (setsockopt(lifd, SOL_SOCKET, SO_REUSEADDR, &on, sizeof(on)) < 0) continue;
if (setsockopt(lifd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n)) < 0) continue;
if (setsockopt(lifd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n)) < 0) continue;
/* LISTENQ is provided in /proc/sys/net/core/somaxconn (default 128) */
if (bind(lifd, res->ai_addr, res->ai_addrlen) == 0 && listen(lifd, 2048) == 0) break;
close(lifd);
} while ( (res = res->ai_next) != NULL);
if (res == NULL) {
syslog(LOG_CRIT, "TCP_socket_creation_main: %m");
_exit(1);
}
freeaddrinfo(reskeep);
if ( (n = fcntl(lifd, F_GETFL, 0)) < 0 || fcntl(lifd, F_SETFL, n | O_NONBLOCK) < 0) {
syslog(LOG_CRIT, "fcntl_main: %m");
_exit(1);
}
/* Confiming number of concurrent connections */
if ( (f = fopen(EPOLLL, "r")) == NULL) {
syslog(LOG_CRIT, "fopen %s: %m", EPOLLL);
_exit(1);
}
if (fscanf(f, "%d", &maxfd) != 1) {
syslog(LOG_CRIT, "fscanf %s: %m", EPOLLL);
_exit(1);
}
if ( (cots = calloc(maxfd + 1, sizeof(time_t))) == NULL) {
syslog(LOG_CRIT, "calloc_cots_main: %m");
_exit(1);
}
syslog(LOG_INFO, "Concurrent TCP connections: %d", maxfd);
fclose(f);
if ( (f = fopen(OFDMAX, "r")) == NULL) {
syslog(LOG_CRIT, "fopen %s: %m", OFDMAX);
_exit(1);
}
if (fscanf(f, "%d", &n) != 1) {
syslog(LOG_CRIT, "fscanf %s: %m", OFDMAX);
_exit(1);
}
if (n < maxfd + 1) syslog(LOG_ERR, "Warning: system wide OFDMAX: %d", n);
fclose(f);
/* Handling pthreads' start */
nth = cpn - 1; //CPU cores - 1 = number of WEB threads to start
if ( (ring = calloc(nth * 2, sizeof(int))) == NULL) {
syslog(LOG_CRIT, "calloc_ring_main: %m");
_exit(1);
}
if (socketpair(AF_LOCAL, SOCK_STREAM, 0, ring) < 0) {
syslog(LOG_CRIT, "socketpair_1_main: %m");
_exit(1);
}
ring[nth * 2 - 1] = ring[1]; //signalling loop for Accept
for (n = 1; n < nth; n++) if (socketpair(AF_LOCAL, SOCK_STREAM, 0, &ring[n * 2 - 1]) < 0) {
syslog(LOG_CRIT, "socketpair___main: %m");
_exit(1);
}
for (n = 0; n < nth; n++) if ( (errno = pthread_create(&tid, NULL, wsnap, &ring[n * 2])) != 0) {
syslog(LOG_CRIT, "pthread_create_main_wsnap: %m");
_exit(1);
}
if ( (errno = pthread_create(&tid, NULL, tidog, NULL)) != 0) {
syslog(LOG_CRIT, "pthread_create_main_tidog: %m");
_exit(1);
}
syslog(LOG_INFO, "WEB threads created");
while (send(ring[nth * 2 - 1], &n, 1, 0) < 0) if (errno != EINTR) {
syslog(LOG_CRIT, "failure to prime: %m");
_exit(1);
}
}
// DNS server section
if ( (dcut = rload(DRANGE)) != NULL) {
if ( (errno = pthread_mutex_init(&udpserv, NULL)) != 0) {
syslog(LOG_CRIT, "mutex_init_main: %m");
_exit(1);
}
/* Opening up listening socket: IP from command line + PRTDNS */
bzero(&hints, sizeof(hints));
hints.ai_flags = AI_PASSIVE;
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_DGRAM;
if ( (n = getaddrinfo(argv[1], PRTDNS, &hints, &res)) != 0) {
syslog(LOG_CRIT, "getaddrinfo_dns_main: %s", gai_strerror(n));
_exit(1);
}
reskeep = res;
n = BUFDNS;
do {
if ( (dnsfd = socket(res->ai_family, res->ai_socktype, res->ai_protocol)) < 0) continue;
if (setsockopt(dnsfd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n)) < 0) continue;
if (bind(dnsfd, res->ai_addr, res->ai_addrlen) == 0) break;
close(dnsfd);
} while ( (res = res->ai_next) != NULL);
if (res == NULL) {
syslog(LOG_CRIT, "UDP_socket_creation_main: %m");
_exit(1);
}
freeaddrinfo(reskeep);
/* Confirming UDP socker SO_RCVBUF */
len = sizeof(int);
if (getsockopt(dnsfd, SOL_SOCKET, SO_RCVBUF, &n, &len) < 0) syslog(LOG_ERR, "UDP SO_RCVBUF unavailable: %m");
else syslog(LOG_INFO, "UDP SO_RCVBUF set to %d", n);
/* Handling threads */
for (n = 0; n < cpn; n++) if ( (errno = pthread_create(&tid, NULL, dsnap, NULL)) != 0) {
syslog(LOG_CRIT, "pthread_create_main_dsnap: %m");
_exit(1);
}
syslog(LOG_INFO, "DNS threads created");
}
if (wcut == NULL && dcut == NULL) {
syslog(LOG_CRIT, "No server to run: exiting");
_exit(1);
} else syslog(LOG_INFO, "system armed");
// Waiting for a signal to do errands
for (; ;) {
if ( (errno = sigwait(&set, &n)) != 0) {
syslog(LOG_ERR, "sigwait_main: %m");
sleep(9);
continue;
}
if (n == SIGHUP) {
if (wcut != NULL) {
if ( (rnew = rload(WRANGE)) != NULL) {
rold = wcut;
pthread_rwlock_wrlock(&cfglock);
wcut = rnew;
pthread_rwlock_unlock(&cfglock);
freecut(rold);
syslog(LOG_INFO, "%s reloaded", WRANGE);
} else syslog(LOG_ERR, "%s failed to reload", WRANGE);
}
if (dcut != NULL) {
if ( (rnew = rload(DRANGE)) != NULL) {
rold = dcut;
pthread_rwlock_wrlock(&cfglock);
dcut = rnew;
pthread_rwlock_unlock(&cfglock);
freecut(rold);
syslog(LOG_INFO, "%s reloaded", DRANGE);
} else syslog(LOG_ERR, "%s failed to reload", DRANGE);
}
if ( (snew = sload()) != NULL) {
sold = spil;
pthread_rwlock_wrlock(&cfglock);
spil = snew;
pthread_rwlock_unlock(&cfglock);
freesdb(sold);
syslog(LOG_INFO, "%s reloaded", SPFILE);
} else syslog(LOG_ERR, "%s failed to reload", SPFILE);
}
}
}