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1 #include "pthread_impl.h" | 1 #include "pthread_impl.h" |
2 | 2 |
3 volatile size_t __pthread_tsd_size = sizeof(void *) * PTHREAD_KEYS_MAX; | 3 volatile size_t __pthread_tsd_size = sizeof(void*) * PTHREAD_KEYS_MAX; |
4 void *__pthread_tsd_main[PTHREAD_KEYS_MAX] = { 0 }; | 4 void* __pthread_tsd_main[PTHREAD_KEYS_MAX] = {0}; |
5 | 5 |
6 static void (*volatile keys[PTHREAD_KEYS_MAX])(void *); | 6 static void (*volatile keys[PTHREAD_KEYS_MAX])(void*); |
7 | 7 |
8 static void nodtor(void *dummy) | 8 static void nodtor(void* dummy) {} |
9 { | 9 |
| 10 int __pthread_key_create(pthread_key_t* k, void (*dtor)(void*)) { |
| 11 unsigned i = (uintptr_t)&k / 16 % PTHREAD_KEYS_MAX; |
| 12 unsigned j = i; |
| 13 pthread_t self = __pthread_self(); |
| 14 |
| 15 /* This can only happen in the main thread before |
| 16 * pthread_create has been called. */ |
| 17 if (!self->tsd) |
| 18 self->tsd = __pthread_tsd_main; |
| 19 |
| 20 if (!dtor) |
| 21 dtor = nodtor; |
| 22 do { |
| 23 if (!a_cas_p(keys + j, 0, (void*)dtor)) { |
| 24 *k = j; |
| 25 return 0; |
| 26 } |
| 27 } while ((j = (j + 1) % PTHREAD_KEYS_MAX) != i); |
| 28 return EAGAIN; |
10 } | 29 } |
11 | 30 |
12 int __pthread_key_create(pthread_key_t *k, void (*dtor)(void *)) | 31 int __pthread_key_delete(pthread_key_t k) { |
13 { | 32 keys[k] = 0; |
14 » unsigned i = (uintptr_t)&k / 16 % PTHREAD_KEYS_MAX; | 33 return 0; |
15 » unsigned j = i; | |
16 » pthread_t self = __pthread_self(); | |
17 | |
18 » /* This can only happen in the main thread before | |
19 » * pthread_create has been called. */ | |
20 » if (!self->tsd) self->tsd = __pthread_tsd_main; | |
21 | |
22 » if (!dtor) dtor = nodtor; | |
23 » do { | |
24 » » if (!a_cas_p(keys+j, 0, (void *)dtor)) { | |
25 » » » *k = j; | |
26 » » » return 0; | |
27 » » } | |
28 » } while ((j=(j+1)%PTHREAD_KEYS_MAX) != i); | |
29 » return EAGAIN; | |
30 } | 34 } |
31 | 35 |
32 int __pthread_key_delete(pthread_key_t k) | 36 void __pthread_tsd_run_dtors() { |
33 { | 37 pthread_t self = __pthread_self(); |
34 » keys[k] = 0; | 38 int i, j, not_finished = self->tsd_used; |
35 » return 0; | 39 for (j = 0; not_finished && j < PTHREAD_DESTRUCTOR_ITERATIONS; j++) { |
36 } | 40 not_finished = 0; |
37 | 41 for (i = 0; i < PTHREAD_KEYS_MAX; i++) { |
38 void __pthread_tsd_run_dtors() | 42 if (self->tsd[i] && keys[i]) { |
39 { | 43 void* tmp = self->tsd[i]; |
40 » pthread_t self = __pthread_self(); | 44 self->tsd[i] = 0; |
41 » int i, j, not_finished = self->tsd_used; | 45 keys[i](tmp); |
42 » for (j=0; not_finished && j<PTHREAD_DESTRUCTOR_ITERATIONS; j++) { | 46 not_finished = 1; |
43 » » not_finished = 0; | 47 } |
44 » » for (i=0; i<PTHREAD_KEYS_MAX; i++) { | 48 } |
45 » » » if (self->tsd[i] && keys[i]) { | 49 } |
46 » » » » void *tmp = self->tsd[i]; | |
47 » » » » self->tsd[i] = 0; | |
48 » » » » keys[i](tmp); | |
49 » » » » not_finished = 1; | |
50 » » » } | |
51 » » } | |
52 » } | |
53 } | 50 } |
54 | 51 |
55 weak_alias(__pthread_key_delete, pthread_key_delete); | 52 weak_alias(__pthread_key_delete, pthread_key_delete); |
56 weak_alias(__pthread_key_create, pthread_key_create); | 53 weak_alias(__pthread_key_create, pthread_key_create); |
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