Last change
on this file since 413 was 398, checked in by coas-nagasima, 5 years ago |
mbedTLS版Azure IoT Hub接続サンプルのソースコードを追加
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File size:
920 bytes
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[398] | 1 | #include <pthread.h>
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| 2 | #include "libc.h"
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| 3 |
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| 4 | static struct atfork_funcs {
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| 5 | void (*prepare)(void);
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| 6 | void (*parent)(void);
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| 7 | void (*child)(void);
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| 8 | struct atfork_funcs *prev, *next;
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| 9 | } *funcs;
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| 10 |
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| 11 | static volatile int lock[2];
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| 12 |
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| 13 | void __fork_handler(int who)
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| 14 | {
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| 15 | struct atfork_funcs *p;
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| 16 | if (!funcs) return;
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| 17 | if (who < 0) {
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| 18 | LOCK(lock);
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| 19 | for (p=funcs; p; p = p->next) {
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| 20 | if (p->prepare) p->prepare();
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| 21 | funcs = p;
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| 22 | }
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| 23 | } else {
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| 24 | for (p=funcs; p; p = p->prev) {
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| 25 | if (!who && p->parent) p->parent();
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| 26 | else if (who && p->child) p->child();
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| 27 | funcs = p;
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| 28 | }
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| 29 | UNLOCK(lock);
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| 30 | }
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| 31 | }
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| 32 |
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| 33 | int pthread_atfork(void (*prepare)(void), void (*parent)(void), void (*child)(void))
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| 34 | {
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| 35 | struct atfork_funcs *new = malloc(sizeof *new);
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| 36 | if (!new) return -1;
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| 37 |
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| 38 | LOCK(lock);
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| 39 | new->next = funcs;
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| 40 | new->prev = 0;
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| 41 | new->prepare = prepare;
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| 42 | new->parent = parent;
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| 43 | new->child = child;
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| 44 | if (funcs) funcs->prev = new;
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| 45 | funcs = new;
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| 46 | UNLOCK(lock);
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| 47 | return 0;
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| 48 | }
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