ref: f47ac12115f687ad7ec5348679fda15b4cfc4009
dir: /sys.c/
#include <u.h> #include <libc.h> #include <stdio.h> #include <thread.h> #include "quakedef.h" qboolean isDedicated; mainstacksize = 512*1024; void Sys_Quit(void) { Host_Shutdown(); threadexitsall(nil); } vlong flen(int fd) { vlong l; Dir *d; if((d = dirfstat(fd)) == nil) /* file assumed extant and readable */ sysfatal("flen: %r"); l = d->length; free(d); return l; } double Sys_FloatTime(void) { static long secbase; if(secbase == 0) secbase = time(nil); return nsec()/1000000000.0 - secbase; } void * emalloc(ulong b) { void *p; if((p = malloc(b)) == nil) sysfatal("malloc %lud: %r", b); return p; } void Sys_HighFPPrecision(void) { } void Sys_LowFPPrecision(void) { } static void croak(void *, char *note) { if(strncmp(note, "sys:", 4) == 0){ IN_Shutdown(); SNDDMA_Shutdown(); } noted(NDFLT); } void threadmain(int c, char **v) { static char basedir[1024]; int j; char *home; double time, oldtime, newtime; quakeparms_t parms; memset(&parms, 0, sizeof parms); /* ignore fp exceptions: rendering shit assumes they are */ setfcr(getfcr() & ~(FPOVFL|FPUNFL|FPINVAL|FPZDIV)); notify(croak); COM_InitArgv(c, v); parms.argc = com_argc; parms.argv = com_argv; argv0 = *v; parms.memsize = 8*1024*1024; if(j = COM_CheckParm("-mem")) parms.memsize = atoi(com_argv[j+1]) * 1024*1024; parms.membase = emalloc(parms.memsize); if(home = getenv("home")){ snprint(basedir, sizeof basedir, "%s/lib/quake", home); free(home); }else snprint(basedir, sizeof basedir, "/sys/lib/quake"); parms.basedir = basedir; Host_Init(&parms); oldtime = Sys_FloatTime() - 0.1; for(;;){ // find time spent rendering last frame newtime = Sys_FloatTime(); time = newtime - oldtime; if(cls.state == ca_dedicated){ // play vcrfiles at max speed if(time < sys_ticrate.value){ //usleep(1); continue; // not time to run a server only tic yet } time = sys_ticrate.value; } if(time > sys_ticrate.value*2) oldtime = newtime; else oldtime += time; Host_Frame(time); } }