Last change
on this file since 388 was 388, checked in by coas-nagasima, 5 years ago |
Azure IoT Hub Device C SDK を使ったサンプルの追加
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Property svn:eol-style
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native
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Property svn:keywords
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Id
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Property svn:mime-type
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text/x-csrc
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File size:
1.2 KB
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[388] | 1 | #include <stdlib.h>
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| 2 | #include <stdint.h>
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| 3 | #include "libc.h"
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| 4 |
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| 5 | /* Ensure that at least 32 atexit handlers can be registered without malloc */
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| 6 | #define COUNT 32
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| 7 |
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| 8 | static struct fl
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| 9 | {
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| 10 | struct fl *next;
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| 11 | void (*f[COUNT])(void *);
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| 12 | void *a[COUNT];
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| 13 | } builtin, *head;
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| 14 |
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| 15 | static int slot;
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| 16 | static volatile int lock[2];
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| 17 |
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| 18 | void __funcs_on_exit()
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| 19 | {
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| 20 | void (*func)(void *), *arg;
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| 21 | LOCK(lock);
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| 22 | for (; head; head=head->next, slot=COUNT) while(slot-->0) {
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| 23 | func = head->f[slot];
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| 24 | arg = head->a[slot];
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| 25 | UNLOCK(lock);
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| 26 | func(arg);
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| 27 | LOCK(lock);
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| 28 | }
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| 29 | }
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| 30 |
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| 31 | void __cxa_finalize(void *dso)
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| 32 | {
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| 33 | }
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| 34 |
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| 35 | int __cxa_atexit(void (*func)(void *), void *arg, void *dso)
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| 36 | {
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| 37 | LOCK(lock);
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| 38 |
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| 39 | /* Defer initialization of head so it can be in BSS */
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| 40 | if (!head) head = &builtin;
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| 41 |
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| 42 | /* If the current function list is full, add a new one */
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| 43 | if (slot==COUNT) {
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| 44 | struct fl *new_fl = calloc(sizeof(struct fl), 1);
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| 45 | if (!new_fl) {
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| 46 | UNLOCK(lock);
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| 47 | return -1;
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| 48 | }
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| 49 | new_fl->next = head;
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| 50 | head = new_fl;
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| 51 | slot = 0;
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| 52 | }
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| 53 |
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| 54 | /* Append function to the list. */
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| 55 | head->f[slot] = func;
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| 56 | head->a[slot] = arg;
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| 57 | slot++;
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| 58 |
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| 59 | UNLOCK(lock);
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| 60 | return 0;
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| 61 | }
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| 62 |
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| 63 | static void call(void *p)
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| 64 | {
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| 65 | ((void (*)(void))(uintptr_t)p)();
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| 66 | }
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| 67 |
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| 68 | int atexit(void (*func)(void))
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| 69 | {
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| 70 | return __cxa_atexit(call, (void *)(uintptr_t)func, 0);
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| 71 | }
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