float arcan_event_process(arcan_evctx* ctx, arcan_tick_cb cb)
{
int64_t base = ctx->c_ticks * ARCAN_TIMER_TICK;
int64_t delta = arcan_frametime() - base;
inject_scheduled(ctx);
platform_event_process(ctx);
if (delta > ARCAN_TIMER_TICK){
int nticks = delta / ARCAN_TIMER_TICK;
if (nticks > ARCAN_TICK_THRESHOLD){
epoch += (nticks - 1) * ARCAN_TIMER_TICK;
nticks = 1;
}
ctx->c_ticks += nticks;
cb(nticks);
arcan_bench_register_tick(nticks);
return arcan_event_process(ctx, cb);
}
return (float)delta / (float)ARCAN_TIMER_TICK;
}
int main(int argc, char* argv[])
{
bool windowed = false;
bool fullscreen = false;
bool conservative = false;
bool nosound = false;
bool in_monitor = getenv("ARCAN_MONITOR_FD") != NULL;
bool waitsleep = true;
unsigned char debuglevel = 0;
int scalemode = ARCAN_VIMAGE_NOPOW2;
int width = 640;
int height = 480;
int winx = -1;
int winy = -1;
int timedump = 0;
float vfalign = 0.6;
/* only used when monitor mode is activated, where we want some
* of the global paths etc. accessible, but not *all* of them */
FILE* monitor_outf = NULL;
int monitor = 0;
int monitor_infd = -1;
char* monitor_arg = "LOG";
char* dbfname = NULL;
int ch;
srand( time(0) );
/* VIDs all have a randomized base to provoke crashes in poorly written scripts,
* only -g will make their base and sequence repeatable */
while ((ch = getopt_long(argc, argv, "w:h:x:y:?fvVmisp:q:"
"t:M:O:o:l:a:d:F:1:2:gr:S", longopts, NULL)) >= 0){
switch (ch) {
case '?' :
usage();
exit(1);
break;
case 'w' : width = strtol(optarg, NULL, 10); break;
case 'h' : height = strtol(optarg, NULL, 10); break;
case 'm' : conservative = true; break;
case 'x' : winx = strtol(optarg, NULL, 10); break;
case 'y' : winy = strtol(optarg, NULL, 10); break;
case 'F' : vfalign = strtof(optarg, NULL); break;
case 'f' : fullscreen = true; break;
case 's' : windowed = true; break;
case 'l' : arcan_libpath = strdup(optarg); break;
case 'd' : dbfname = strdup(optarg); break;
case 'S' : nosound = true; break;
case 'q' : timedump = strtol(optarg, NULL, 10); break;
case 'a' : arcan_video_display.msasamples = strtol(optarg, NULL, 10); break;
case 'v' : arcan_video_display.vsync = false; break;
case 'V' : waitsleep = false; break;
case 'p' : arcan_resourcepath = strdup(optarg); break;
#ifndef _WIN32
case 'M' : monitor = abs( strtol(optarg, NULL, 10) ); break;
case 'O' : monitor_arg = strdup( optarg ); break;
#endif
case 't' : arcan_themepath = strdup(optarg); break;
case 'o' : arcan_binpath = strdup(optarg); break;
case 'g' :
debuglevel++;
srand(0xdeadbeef);
break;
case 'r' :
scalemode = strtol(optarg, NULL, 10);
printf("scalemode: %d\n", scalemode);
if (scalemode != ARCAN_VIMAGE_NOPOW2 && scalemode !=
ARCAN_VIMAGE_SCALEPOW2 && scalemode){
arcan_warning("Warning: main(), -r, invalid scalemode. Ignoring.\n");
scalemode = ARCAN_VIMAGE_SCALEPOW2;
}
break;
case '1' :
stdout_redirected = true;
if (freopen(optarg, "a", stdout) == NULL);
break;
case '2' :
stderr_redirected = true;
if (freopen(optarg, "a", stderr) == NULL);
break;
default:
break;
}
}
if (arcan_setpaths() == false)
goto error;
if (check_theme(*(argv + optind)))
arcan_themename = *(argv + optind);
else if (check_theme("welcome"))
arcan_themename = "welcome";
else
arcan_fatal("No theme found.\n");
if (strcmp(arcan_themename, "arcan") == 0){
arcan_fatal("Theme name 'arcan' is reserved\n");
}
if (vfalign > 1.0 || vfalign < 0.0){
arcan_warning("Argument Error (-F, --vsync-falign): "
"bad range specified (%f), reverting to default (0.6)\n", vfalign);
vfalign = 0.6;
}
#ifndef _WIN32
/* pipe to file, socket or launch script based on monitor output,
* format will be LUA tables with the exception of each cell ending with
* #ENDSAMPLE . The block will be sampled, parsed and should return a table
* pushed through the sample() function in the LUA space */
if (in_monitor){
monitor_infd = strtol( getenv("ARCAN_MONITOR_FD"), NULL, 10);
signal(SIGPIPE, SIG_IGN);
}
else if (monitor > 0){
extern arcan_benchdata benchdata;
benchdata.bench_enabled = true;
if (strncmp(monitor_arg, "LOG:", 4) == 0){
monitor_outf = fopen(&monitor_arg[4], "w+");
if (NULL == monitor_outf)
arcan_fatal("couldn't open log output (%s) for writing\n", monitor_arg[4]);
fcntl(fileno(monitor_outf), F_SETFD, FD_CLOEXEC);
}
else {
int pair[2];
pid_t p1;
if (pipe(pair) == 0)
;
if ( (p1 = fork()) == 0){
close(pair[1]);
/* double-fork to get away from parent */
if (fork() != 0)
exit(0);
/*
* set the descriptor of the inherited pipe as an envvariable,
* this will have the program be launched with in_monitor set to true
* the monitor args will then be ignored and themename replaced with
* the monitorarg
*/
char monfd_buf[8] = {0};
snprintf(monfd_buf, 8, "%d", pair[0]);
setenv("ARCAN_MONITOR_FD", monfd_buf, 1);
argv[optind] = strdup(monitor_arg);
execv(argv[0], argv);
exit(1);
}
else {
/* don't terminate just because the pipe gets broken (i.e. dead monitor) */
close(pair[0]);
monitor_outf = fdopen(pair[1], "w");
signal(SIGPIPE, SIG_IGN);
}
}
fullscreen = false;
}
#endif
/* also used as restart point for switiching themes */
themeswitch:
/*
* try to open the specified database,
* if that fails, warn, try to create an empty
* database and if that fails, give up.
*/
if (!dbfname)
dbfname = arcan_expand_resource("arcandb.sqlite", true);
dbhandle = arcan_db_open(dbfname, arcan_themename);
if (!dbhandle) {
arcan_warning("Couldn't open database (requested: %s),"
"trying to create a new one.\n", dbfname);
FILE* fpek = fopen(dbfname, "a");
if (fpek){
fclose(fpek);
dbhandle = arcan_db_open(dbfname, arcan_themename);
}
if (!dbhandle){
arcan_warning("Couldn't create database, giving up.\n");
goto error;
}
}
arcan_video_default_scalemode(scalemode);
if (winx != -1 || winy != -1){
char windbuf[64] = {0};
snprintf(windbuf, 63, "SDL_VIDEO_WINDOW_POS=%i,%i", winx >= 0 ?
winx : 0, winy >= 0 ? winy : 0);
putenv(strdup(windbuf));
}
if (windowed)
fullscreen = false;
/* grab video, (necessary) */
if (arcan_video_init(width, height, 32, fullscreen, windowed, conservative)
!= ARCAN_OK) {
arcan_fatal("Error; Couldn't initialize video system,"
"try other windowing options (-f, -w, ...)\n");
}
errno = 0;
/* grab audio, (possible to live without) */
if (ARCAN_OK != arcan_audio_setup(nosound))
arcan_warning("Warning: No audio devices could be found.\n");
arcan_math_init();
/* setup device polling, cleanup, ... */
arcan_evctx* def = arcan_event_defaultctx();
arcan_event_init( def );
#ifdef ARCAN_LED
arcan_led_init();
#endif
#ifdef ARCAN_HMD
arcan_hmd_setup();
#endif
/*
* MINGW implements putenv, so use this to set
* the system subpath path (BIOS, ..)
*/
if (getenv("ARCAN_SYSTEMPATH") == NULL){
size_t len = strlen(arcan_resourcepath) + sizeof("/games/system") +
sizeof("ARCAN_SYSTEMPATH=") + 1;
char* const syspath = malloc(len);
sprintf(syspath, "ARCAN_SYSTEMPATH=%s/games/system", arcan_resourcepath);
arcan_warning("Notice: Using default systempath (%s)\n", syspath);
putenv(syspath);
} else
arcan_warning("Notice: Using systempath from environment (%s)\n",
getenv("ARCAN_SYSTEMPATH"));
if (getenv("ARCAN_FRAMESERVER_LOGDIR") == NULL){
size_t len = strlen(arcan_resourcepath) + sizeof("/logs") +
sizeof("ARCAN_FRAMESERVER_LOGDIR=/logs");
char* const logpath = malloc(len);
sprintf(logpath, "ARCAN_FRAMESERVER_LOGDIR=%s/logs", arcan_resourcepath);
putenv(logpath);
}
#ifndef _WIN32
struct rlimit coresize = {0};
/* debuglevel 0, no coredumps etc.
* debuglevel 1, maximum 1M coredump, should prioritize stack etc.
* would want to be able to hint to mmap which pages that should be avoided
* so that we could exclude texture data that both comprise most memory used
* and can be recovered through other means. One option for this would be
* to push image loading/management to a separate process,
* debuglevel > 1, dump everything */
if (debuglevel == 0);
else if (debuglevel == 1) coresize.rlim_max = 10 * 1024 * 1024;
else coresize.rlim_max = RLIM_INFINITY;
coresize.rlim_cur = coresize.rlim_max;
setrlimit(RLIMIT_CORE, &coresize);
system_page_size = sysconf(_SC_PAGE_SIZE);
#endif
/* setup VM, map arguments and possible overrides */
struct arcan_luactx* luactx = arcan_lua_alloc();
arcan_lua_mapfunctions(luactx, debuglevel);
char* themescr = (char*) malloc(strlen(arcan_themename) + 5);
sprintf(themescr, "%s.lua", arcan_themename);
char* fn = arcan_find_resource(themescr, ARCAN_RESOURCE_THEME);
char* msg = arcan_luaL_dofile(luactx, fn);
if (msg != NULL){
arcan_fatal("Fatal: main(), Error loading theme script"
"(%s) : (%s)\n", themescr, msg);
free(msg);
goto error;
}
free(fn);
free(themescr);
/* entry point follows the name of the theme,
* hand over execution and begin event loop */
if (argc > optind)
arcan_lua_pushargv(luactx, argv + optind + 1);
arcan_lua_callvoidfun(luactx, "", true);
arcan_lua_callvoidfun(luactx, "show", false);
bool done = false, framepulse = true, feedtrig = true;
float lastfrag = 0.0f;
long long int lastflip = arcan_timemillis();
int monitor_counter = monitor;
arcan_event ev;
arcan_evctx* evctx = arcan_event_defaultctx();
while (!done) {
/* pollfeed can actually populate event-loops, assuming we don't exceed a
* compile- time threshold */
#ifdef ARCAN_HMD
arcan_hmd_update();
#endif
if (feedtrig){
feedtrig = false;
arcan_video_pollfeed();
}
/* NOTE: might be better if this terminates if we're closing in on a
* deadline as to not be saturated with an onslaught of I/O events. */
while (1 == arcan_event_poll(evctx, &ev)){
/*
* these events can typically be determined in video_tick(),
* however there are so many hierarchical dependencies
* (linked objs, instances, ...)
* that a full delete is not really safe there (e.g. event -> callback ->
*/
switch (ev.category){
case EVENT_VIDEO:
if (ev.kind == EVENT_VIDEO_EXPIRE)
arcan_video_deleteobject(ev.data.video.source);
break;
case EVENT_SYSTEM:
/* note the LUA shutdown() call actually emits this event */
if (ev.kind == EVENT_SYSTEM_EXIT)
done = true;
else if (ev.kind == EVENT_SYSTEM_SWITCHTHEME){
arcan_luaL_shutdown(luactx);
arcan_video_shutdown();
arcan_audio_shutdown();
arcan_event_deinit(arcan_event_defaultctx());
arcan_db_close(dbhandle);
arcan_themename = strdup(ev.data.system.data.message);
goto themeswitch;
}
else
continue;
break;
}
arcan_lua_pushevent(luactx, &ev);
}
unsigned nticks;
float frag = arcan_event_process(arcan_event_defaultctx(), &nticks);
if (debuglevel == 4)
arcan_warning("main() event_process (%d, %f)\n", nticks, frag);
/* priority is always in maintaining logical clock and event processing */
if (nticks > 0){
unsigned njobs;
arcan_video_tick(nticks, &njobs);
arcan_bench_register_tick(nticks);
arcan_audio_tick(nticks);
lastfrag = 0.0;
if (monitor && !in_monitor){
if (--monitor_counter == 0){
static int mc;
char buf[8];
snprintf(buf, 8, "%d", mc++);
monitor_counter = monitor;
arcan_lua_statesnap(monitor_outf, buf, true);
}
}
/* debugging functionality to generate a dump and abort after n ticks */
if (timedump){
timedump -= nticks;
if (timedump <= 0){
arcan_state_dump("timedump", "user requested a dump", __func__);
break;
}
}
}
/* this is internally buffering and non-blocking, hence the fd use compared
* to arcan_lua_statesnap above */
#ifndef _WIN32
if (in_monitor)
arcan_lua_stategrab(luactx, "sample", monitor_infd);
#endif
/*
* difficult decision, should we flip or not?
* a full- redraw can be costly, so should only really be done if
* enough things have changed or if we're closing in on the next
* deadline for the unknown video clock, this also depends on if
* the user favors energy saving (waitsleep) or responsiveness.
*/
const int min_respthresh = 9;
/* only render if there's enough relevant changes */
if (!waitsleep || nticks > 0 || frag - lastfrag > INTERP_MINSTEP){
/* separate between cheap (possibly vsync off or triple buffering)
* flip cost and expensive (vsync on) */
if (arcan_video_display.vsync_timing < 8.0){
unsigned cost = arcan_video_refresh(frag, true);
feedtrig = true;
arcan_bench_register_cost(cost);
arcan_bench_register_frame();
if (framepulse)
framepulse = arcan_lua_callvoidfun(luactx, "frame_pulse", false);
int delta = arcan_timemillis() - lastflip;
lastflip += delta;
if (waitsleep && delta < min_respthresh)
arcan_timesleep(min_respthresh - delta);
}
else {
int delta = arcan_timemillis() - lastflip;
if (delta >= (float)arcan_video_display.vsync_timing * vfalign){
unsigned cost = arcan_video_refresh(frag, true);
feedtrig = true;
arcan_bench_register_cost(cost);
arcan_bench_register_frame();
if (framepulse)
framepulse = arcan_lua_callvoidfun(luactx, "frame_pulse", false);
lastflip += delta;
}
}
}
arcan_audio_refresh();
}
arcan_lua_callvoidfun(luactx, "shutdown", false);
#ifdef ARCAN_LED
arcan_led_shutdown();
#endif
#ifdef ARCAN_HMD
arcan_hmd_shutdown();
#endif
arcan_video_shutdown();
error:
exit(1);
return 0;
}