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annotate libmlk-core/mlk/core/panic.c @ 645:83781cc87fca

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core: rework game stack state mechanism The current model was fundamentally broken as the state could continue its execution when calling mlk_game_pop from itself (e.g. in update). The current model uses a sjlj mechanism with mlk_game_push/pop being disallowed in special state function like end, finish, suspend.
author David Demelier <markand@malikania.fr>
date Sun, 04 Feb 2024 15:24:00 +0100
parents 4349b591c3ac
children
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1 /*
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2 * panic.c -- unrecoverable error handling
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3 *
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4 * Copyright (c) 2020-2023 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <assert.h>
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20 #include <stdio.h>
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21 #include <stdlib.h>
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22
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23 #include "core_p.h"
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24 #include "err.h"
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25 #include "panic.h"
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27 static void
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28 terminate(const char *what)
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29 {
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30 fprintf(stderr, _("abort: %s\n"), what);
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31 abort();
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32 exit(1);
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33 }
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34
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35 void (*mlk_panic_handler)(const char *) = terminate;
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36
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37 static void
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38 alive(void)
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39 {
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40 /*
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41 * This should not happen, if it does it means the user did not fully
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42 * satisfied the constraint of mlk_panic_handler.
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43 */
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44 fprintf(stderr, _("abort: panic handler returned\n"));
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45 exit(1);
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46 }
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47
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48 void
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49 mlk_panicf(const char *fmt, ...)
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50 {
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51 assert(fmt);
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52
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53 va_list ap;
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54 char buf[PANIC_LINE_MAX];
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56 /*
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57 * We can't use mlk_panicva directly because we won't be able to call
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58 * va_end then.
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59 */
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60 va_start(ap, fmt);
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61 vsnprintf(buf, sizeof (buf), fmt, ap);
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62 va_end(ap);
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63
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64 mlk_panic_handler(buf);
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65 alive();
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66 }
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68 void
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69 mlk_panicva(const char *fmt, va_list ap)
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70 {
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71 assert(fmt);
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72 assert(mlk_panic_handler);
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74 char buf[PANIC_LINE_MAX];
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75
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76 vsnprintf(buf, sizeof (buf), fmt, ap);
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77 mlk_panic_handler(buf);
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78 alive();
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79 }
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81 void
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82 mlk_panic(void)
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83 {
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84 mlk_panicf("%s", mlk_err());
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85 }