ref: 376e27387ce41157c13401981ecab105612c244e
dir: /qk1.c/
#include <u.h> #include <libc.h> #include <thread.h> #include "dat.h" #include "quakedef.h" #include "fns.h" mainstacksize = 512*1024; uchar *membase; int memsize; enum{ KB = 1024*1024, Nmem = 8 * KB }; static int debug; void dprint(char *fmt, ...) { char s[256]; va_list arg; if(!debug) return; va_start(arg, fmt); vseprint(s, s+sizeof s, fmt, arg); va_end(arg); fprint(2, "%s\n", s); } /* FIXME: merge dprint/fatal? */ void fatal(char *fmt, ...) { char s[1024]; va_list arg; va_start(arg, fmt); vseprint(s, s+sizeof s, fmt, arg); va_end(arg); Host_Shutdown(); fprint(2, "%s: %s\n", argv0, s); exits(s); } void * emalloc(ulong n) { void *p; if(p = mallocz(n, 1), p == nil) sysfatal("emalloc %r"); setmalloctag(p, getcallerpc(&n)); return p; } 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 dtime(void) { static double t0; if(t0 == 0.0) t0 = time(nil); return nsec() / 1000000000.0 - t0; } void fppdbl(void) { } void fppsgl(void) { } void shutdown(void) { Host_Shutdown(); threadexitsall(nil); } static void croak(void *, char *note) { if(strncmp(note, "sys:", 4) == 0) IN_Grabm(0); noted(NDFLT); } void threadmain(int c, char **v) { int n; double t, t´, Δt; /* ignore fp exceptions: rendering shit assumes they are */ setfcr(getfcr() & ~(FPOVFL|FPUNFL|FPINVAL|FPZDIV)); notify(croak); COM_InitArgv(c, v); argv0 = *v; memsize = Nmem; if(n = COM_CheckParm("-mem")) memsize = atoi(com_argv[n+1]) * KB; membase = emalloc(memsize); Host_Init(); t = dtime() - 1.0 / Fpsmax; for(;;){ t´ = dtime(); Δt = t´ - t; if(cls.state == ca_dedicated){ if(Δt < sys_ticrate.value) continue; Δt = sys_ticrate.value; } if(Δt > sys_ticrate.value * 2) t = t´; else t += Δt; Host_Frame(Δt); } }