1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/*
* Copyright (c) 2004 Stefan Ulrich
*
* 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;
} *exit_procs = NULL;
static size_t exit_procs_size = 0;
void register_exit_handler(exit_procedure proc, void *arg)
{
size_t idx = exit_procs_size;
exit_procs_size++;
exit_procs = xrealloc(exit_procs, sizeof *exit_procs * exit_procs_size);
exit_procs[idx].proc = proc;
exit_procs[idx].arg = arg;
}
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;
}
}
}
void call_exit_handlers(void)
{
size_t i;
for (i = 0; i < exit_procs_size; i++) {
if (exit_procs[i].proc)
exit_procs[i].proc(exit_procs[i].arg);
/* fprintf(stderr, "calling exit proc %lu\n", (unsigned long)i); */
}
free(exit_procs);
}
|
