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  • /* timers.c
    
    Copyright (C) 1999-2003 Tom Gilbert.
    
    Copyright (C) 2010-2020 Daniel Friesel.
    
    
    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to
    deal in the Software without restriction, including without limitation the
    rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
    sell copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:
    
    The above copyright notice and this permission notice shall be included in
    all copies of the Software and its documentation and acknowledgment shall be
    given in the documentation and software packages that this Software was
    used.
    
    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
    THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
    IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
    CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
    
    */
    
    #include "feh.h"
    #include "options.h"
    #include "timers.h"
    
    fehtimer first_timer = NULL;
    
    
    		D(("No timer to handle, returning\n"));
    
    	}
    	ft = first_timer;
    	first_timer = first_timer->next;
    
    	D(("Executing timer function now\n"));
    
    	D(("Freeing the timer\n"));
    
    	if (ft && ft->name)
    		free(ft->name);
    	if (ft)
    		free(ft);
    
    	return((double) timev.tv_sec + (((double) timev.tv_usec) / 1000000));
    
    void feh_remove_timer(char *name)
    
    	D(("removing %s\n", name));
    
    	pptr = NULL;
    	ptr = first_timer;
    	while (ptr) {
    
    		D(("Stepping through event list\n"));
    
    		ft = ptr;
    		if (!strcmp(ft->name, name)) {
    
    			D(("Found it. Removing\n"));
    
    			if (pptr)
    				pptr->next = ft->next;
    			else
    				first_timer = ft->next;
    			if (ft->next)
    				ft->next->in += ft->in;
    			if (ft->name)
    				free(ft->name);
    			if (ft)
    				free(ft);
    
    void feh_add_timer(void (*func) (void *data), void *data, double in, char *name)
    
    	D(("adding timer %s for %f seconds time\n", name, in));
    
    	ft->next = NULL;
    	ft->func = func;
    	ft->data = data;
    	ft->name = estrdup(name);
    	ft->just_added = 1;
    	ft->in = in;
    
    	D(("ft->in = %f\n", ft->in));
    
    		D(("No first timer\n"));
    
    		D(("There is a first timer\n"));
    
    		pptr = NULL;
    		ptr = first_timer;
    		tally = 0.0;
    		while (ptr) {
    			tally += ptr->in;
    			if (tally > in) {
    				tally -= ptr->in;
    				ft->next = ptr;
    				if (pptr)
    					pptr->next = ft;
    				else
    					first_timer = ft;
    				ft->in -= tally;
    				if (ft->next)
    					ft->next->in -= ft->in;
    
    			}
    			pptr = ptr;
    			ptr = ptr->next;
    		}
    		if (pptr)
    			pptr->next = ft;
    		else
    			first_timer = ft;
    		ft->in -= tally;
    	}
    
    	D(("ft->in = %f\n", ft->in));
    
    void feh_add_unique_timer(void (*func) (void *data), void *data, double in)
    
    	static long i = 0;
    	char evname[20];
    
    	snprintf(evname, sizeof(evname), "T_%ld", i);
    
    	D(("adding timer with unique name %s\n", evname));
    
    	feh_add_timer(func, data, in, evname);
    	i++;
    	/* Mega paranoia ;) */
    	if (i > 1000000)
    		i = 0;