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/*
* Copyright (c) 2004-2015 Stefan Ulrich and the xdvik development team
*
* 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 or substantial portions of the Software.
*
* 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
* PAUL VOJTA OR ANY OTHER AUTHOR OF THIS SOFTWARE 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.
*
*/
/*
Exit handlers: Procedures taking a void * that can be registered
via register_exit_handler() and will be called fromx xdvi_exit().
*/
#include "xdvi-config.h"
#include "xdvi.h"
#include "exit-handlers.h"
#include "util.h"
static struct exit_list {
exit_procedure proc;
void *arg;
struct exit_list *next;
} *exit_procs = NULL;
void register_exit_handler(exit_procedure proc, void *arg)
{
struct exit_list *ep;
/* first check for duplicates (needed because of remove_tmp_dvi_file) */
for (ep = exit_procs; ep != NULL; ep = ep->next) {
if (ep->proc == proc && ep->arg == arg)
return;
}
ep = xmalloc(sizeof *ep);
ep->proc = proc;
ep->arg = arg;
ep->next = exit_procs;
exit_procs = ep;
}
#if 0 /* This is currently unused. */
void unregister_exit_handler(exit_procedure proc)
{
size_t i;
for (i = 0; i < exit_procs_size; i++) {
if (exit_procs[i].proc == proc) {
fprintf(stderr, "unregistering %p!\n", (void *)proc);
exit_procs[i].proc = NULL;
exit_procs[i].arg = NULL;
}
}
}
#endif
void call_exit_handlers(void)
{
struct exit_list *ep;
for (ep = exit_procs; ep != NULL; ep = ep->next) {
ep->proc(ep->arg);
/* fprintf(stderr, "calling exit proc %lu\n", (unsigned long)i); */
}
/* free them */
while (exit_procs != NULL) {
ep = exit_procs;
exit_procs = exit_procs->next;
free(ep);
}
}
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