projects / dragonfly.git / blame
| Commit | Line | Data |
|---|---|---|
| a329a283 SW |
1 | /*- |
| 2 | * Copyright (c) 2012 | |
| 3 | * The DragonFly Project. All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * | |
| 9 | * 1. Redistributions of source code must retain the above copyright | |
| 10 | * notice, this list of conditions and the following disclaimer. | |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer in | |
| 13 | * the documentation and/or other materials provided with the | |
| 14 | * distribution. | |
| 15 | * 3. Neither the name of The DragonFly Project nor the names of its | |
| 16 | * contributors may be used to endorse or promote products derived | |
| 17 | * from this software without specific, prior written permission. | |
| 18 | * | |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 21 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
| 22 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
| 23 | * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| 24 | * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, | |
| 25 | * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 26 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED | |
| 27 | * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
| 28 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT | |
| 29 | * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 30 | * SUCH DAMAGE. | |
| 31 | */ | |
| 22ab97ca VS |
32 | |
| 33 | #include <stdlib.h> | |
| 34 | #include <unistd.h> | |
| 35 | ||
| 36 | #include "libc_private.h" | |
| 37 | #include "spinlock.h" | |
| 38 | ||
| 39 | ||
| 40 | struct quick_exit_fn { | |
| 41 | struct quick_exit_fn *next; | |
| 42 | void (*func)(void); | |
| 43 | }; | |
| 44 | ||
| 45 | static struct quick_exit_fn *quick_exit_fns; | |
| 46 | static spinlock_t quick_exit_spinlock; | |
| 47 | ||
| 48 | /* | |
| 49 | * at_quick_exit: | |
| 50 | * | |
| 51 | * Register a function to be called at quick_exit. | |
| 52 | */ | |
| 53 | int | |
| 54 | at_quick_exit(void (*func)(void)) | |
| 55 | { | |
| 56 | struct quick_exit_fn *fn; | |
| 57 | ||
| 58 | fn = malloc(sizeof(struct quick_exit_fn)); | |
| 59 | if (!fn) | |
| 60 | return (-1); | |
| 61 | ||
| 62 | fn->func = func; | |
| 63 | ||
| 64 | if (__isthreaded) | |
| 65 | _SPINLOCK(&quick_exit_spinlock); | |
| 66 | ||
| 67 | fn->next = quick_exit_fns; | |
| 68 | quick_exit_fns = fn; | |
| 69 | ||
| 70 | if (__isthreaded) | |
| 71 | _SPINUNLOCK(&quick_exit_spinlock); | |
| 72 | ||
| 73 | return (0); | |
| 74 | } | |
| 75 | ||
| 76 | /* | |
| 77 | * quick_exit: | |
| 78 | * | |
| 79 | * Abandon a process. Execute all quick_exit handlers. | |
| 80 | */ | |
| 81 | void | |
| 82 | quick_exit(int status) | |
| 83 | { | |
| 84 | struct quick_exit_fn *fn; | |
| 85 | ||
| 86 | if (__isthreaded) | |
| 87 | _SPINLOCK(&quick_exit_spinlock); | |
| 88 | for (fn = quick_exit_fns; fn != NULL; fn = fn->next) { | |
| 89 | fn->func(); | |
| 90 | } | |
| 91 | if (__isthreaded) | |
| 92 | _SPINUNLOCK(&quick_exit_spinlock); | |
| 93 | ||
| 94 | _exit(status); | |
| 95 | } |