/* * 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); } }