projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 33574c17 ST |
1 | /* pthread_key internal declatations for the Hurd version. |
| 2 | Copyright (C) 2002-2018 Free Software Foundation, Inc. | |
| 3 | This file is part of the GNU C Library. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| ad2b41bf ST |
6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 33574c17 ST |
9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| ad2b41bf | 13 | Lesser General Public License for more details. |
| 33574c17 | 14 | |
| ad2b41bf ST |
15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see | |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 33574c17 ST |
18 | |
| 19 | #include <pthread.h> | |
| 20 | #include <libc-lockP.h> | |
| 21 | ||
| 22 | #define PTHREAD_KEY_MEMBERS \ | |
| 23 | void **thread_specifics; /* This is only resized by the thread, and always growing */ \ | |
| 24 | unsigned thread_specifics_size; /* Number of entries in thread_specifics */ | |
| 25 | ||
| 26 | #define PTHREAD_KEY_INVALID (void *) (-1) | |
| 27 | ||
| 28 | ||
| 29 | /* __PTHREAD_KEY_DESTRUCTORS is an array of destructors with | |
| 30 | __PTHREAD_KEY_SIZE elements. If an element with index less than | |
| 31 | __PTHREAD_KEY_COUNT is invalid, it shall contain the value | |
| 32 | PTHREAD_KEY_INVALID which shall be distinct from NULL. | |
| 33 | ||
| 34 | Normally, we just add new keys to the end of the array and realloc | |
| 35 | it as necessary. The pthread_key_create routine may decide to | |
| 36 | rescan the array if __PTHREAD_KEY_FREE is large. */ | |
| 37 | extern void (**__pthread_key_destructors) (void *arg); | |
| 38 | extern int __pthread_key_size; | |
| 39 | extern int __pthread_key_count; | |
| 40 | /* Number of invalid elements in the array. Does not include elements | |
| 41 | for which memory has been allocated but which have not yet been | |
| 42 | used (i.e. those elements with indexes greater than | |
| 43 | __PTHREAD_KEY_COUNT). */ | |
| 44 | extern int __pthread_key_invalid_count; | |
| 45 | ||
| 46 | /* Protects the above variables. This must be a recursive lock: the | |
| 47 | destructors may call pthread_key_delete. */ | |
| 48 | extern pthread_mutex_t __pthread_key_lock; | |
| 49 | \f | |
| 50 | #include <assert.h> | |
| 51 | ||
| 52 | static inline void | |
| 53 | __pthread_key_lock_ready (void) | |
| 54 | { | |
| 55 | static pthread_once_t o = PTHREAD_ONCE_INIT; | |
| 56 | ||
| 57 | void do_init (void) | |
| 58 | { | |
| 59 | int err; | |
| 60 | pthread_mutexattr_t attr; | |
| 61 | ||
| 62 | err = __pthread_mutexattr_init (&attr); | |
| 63 | assert_perror (err); | |
| 64 | ||
| 65 | err = __pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE); | |
| 66 | assert_perror (err); | |
| 67 | ||
| 68 | err = _pthread_mutex_init (&__pthread_key_lock, &attr); | |
| 69 | assert_perror (err); | |
| 70 | ||
| 71 | err = __pthread_mutexattr_destroy (&attr); | |
| 72 | assert_perror (err); | |
| 73 | } | |
| 74 | ||
| 75 | __pthread_once (&o, do_init); | |
| 76 | } |