/**
* @brief Determines a storage controller.
*
* This is the internal function of 'block device' module. The function gets
* a pointer to controller structure the device is connected to.
*
* @param[in] cntrl_list pointer to list of supported controllers.
* @param[in] path path to block device in sysfs tree.
*
* @return Pointer to controller structure if successful, otherwise the function
* returns NULL pointer. The NULL pointer means that block devices is
* connected to unsupported storage controller.
*/
struct cntrl_device *block_get_controller(void *cntrl_list, char *path)
{
return list_first_that(cntrl_list, _compare, path);
}
Bool
prima_one_loop_round( Bool wait, Bool careOfApplication)
{
XEvent ev, next_event;
fd_set read_set, write_set, excpt_set;
struct timeval timeout;
int r, i, queued_events;
PTimerSysData timer;
if ( guts. applicationClose) return false;
if (( queued_events = XEventsQueued( DISP, QueuedAlready))) {
goto FetchAndProcess;
}
read_set = guts.read_set;
write_set = guts.write_set;
excpt_set = guts.excpt_set;
if ( guts. oldest) {
gettimeofday( &timeout, nil);
if ( guts. oldest-> when. tv_sec < timeout. tv_sec ||
( guts. oldest-> when. tv_sec == timeout. tv_sec &&
guts. oldest-> when. tv_usec <= timeout. tv_usec)) {
timer = guts. oldest;
apc_timer_start( timer-> who);
if ( timer-> who == CURSOR_TIMER) {
prima_cursor_tick();
} else if ( timer-> who == MENU_TIMER) {
apc_timer_stop( MENU_TIMER);
if ( guts. currentMenu) {
XEvent ev;
ev. type = MenuTimerMessage;
prima_handle_menu_event( &ev, M(guts. currentMenu)-> w-> w, guts. currentMenu);
}
} else if ( timer-> who == MENU_UNFOCUS_TIMER) {
prima_end_menu();
} else {
prima_simple_message( timer-> who, cmTimer, false);
}
gettimeofday( &timeout, nil);
}
if ( guts. oldest && wait) {
if ( guts. oldest-> when. tv_sec < timeout. tv_sec) {
timeout. tv_sec = 0;
timeout. tv_usec = 0;
} else {
timeout. tv_sec = guts. oldest-> when. tv_sec - timeout. tv_sec;
if ( guts. oldest-> when. tv_usec < timeout. tv_usec) {
if ( timeout. tv_sec == 0) {
timeout. tv_sec = 0;
timeout. tv_usec = 0;
} else {
timeout. tv_sec--;
timeout. tv_usec = 1000000 - (timeout. tv_usec - guts. oldest-> when. tv_usec);
}
} else {
timeout. tv_usec = guts. oldest-> when. tv_usec - timeout. tv_usec;
}
}
if ( timeout. tv_sec > 0 || timeout. tv_usec > 200000) {
timeout. tv_sec = 0;
timeout. tv_usec = 200000;
}
} else {
timeout. tv_sec = 0;
if ( wait)
timeout. tv_usec = 200000;
else
timeout. tv_usec = 0;
}
} else {
timeout. tv_sec = 0;
if ( wait)
timeout. tv_usec = 200000;
else
timeout. tv_usec = 0;
}
if (( r = select( guts.max_fd+1, &read_set, &write_set, &excpt_set, &timeout)) > 0 &&
FD_ISSET( guts.connection, &read_set)) {
if (( queued_events = XEventsQueued( DISP, QueuedAfterFlush)) <= 0) {
/* just like tcl/perl tk do, to avoid an infinite loop */
RETSIGTYPE oldHandler = signal( SIGPIPE, SIG_IGN);
XNoOp( DISP);
XFlush( DISP);
(void) signal( SIGPIPE, oldHandler);
}
FetchAndProcess:
if ( queued_events && ( application || !careOfApplication)) {
XNextEvent( DISP, &ev);
XCHECKPOINT;
queued_events--;
while ( queued_events > 0) {
if (!application && careOfApplication) return false;
XNextEvent( DISP, &next_event);
XCHECKPOINT;
prima_handle_event( &ev, &next_event);
guts. total_events++;
queued_events = XEventsQueued( DISP, QueuedAlready);
memcpy( &ev, &next_event, sizeof( XEvent));
}
if (!application && careOfApplication) return false;
guts. total_events++;
prima_handle_event( &ev, nil);
}
XNoOp( DISP);
XFlush( DISP);
} else if ( r < 0) {
list_first_that( guts.files, (void*)purge_invalid_watchers, nil);
} else {
if ( r > 0) {
for ( i = 0; i < guts.files->count; i++) {
PFile f = (PFile)list_at( guts.files,i);
if ( FD_ISSET( f->fd, &read_set) && (f->eventMask & feRead)) {
prima_simple_message((Handle)f, cmFileRead, false);
break;
} else if ( FD_ISSET( f->fd, &write_set) && (f->eventMask & feWrite)) {
prima_simple_message((Handle)f, cmFileWrite, false);
break;
} else if ( FD_ISSET( f->fd, &excpt_set) && (f->eventMask & feException)) {
prima_simple_message((Handle)f, cmFileException, false);
break;
}
}
} else {
XNoOp( DISP);
XFlush( DISP);
}
}
send_pending_events();
perform_pending_paints();
kill_zombies();
return application != nilHandle;
}