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author | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2018-12-27 19:01:57 +0000 |
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committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2018-12-27 19:01:57 +0000 |
commit | cab56836b146bc129f1ad43f0393d95a9deca63a (patch) | |
tree | 4f4e655319bbac78fca170da05275c127429b460 /sysdeps/htl/pt-key.h | |
parent | 04ac1241a4cd004872282c2c82ec37fa33925292 (diff) | |
parent | 82dd75a7f436a19047325d62182590c9f9e23a78 (diff) |
Merge branch 't/tls' into refs/top-bases/t/tls-threadvar
Diffstat (limited to 'sysdeps/htl/pt-key.h')
-rw-r--r-- | sysdeps/htl/pt-key.h | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/sysdeps/htl/pt-key.h b/sysdeps/htl/pt-key.h new file mode 100644 index 0000000000..893adccd2e --- /dev/null +++ b/sysdeps/htl/pt-key.h @@ -0,0 +1,77 @@ +/* pthread_key internal declatations for the Hurd version. + Copyright (C) 2002-2018 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <pthread.h> +#include <libc-lockP.h> +#include <pthreadP.h> + +#define PTHREAD_KEY_MEMBERS \ + void **thread_specifics; /* This is only resized by the thread, and always growing */ \ + unsigned thread_specifics_size; /* Number of entries in thread_specifics */ + +#define PTHREAD_KEY_INVALID (void *) (-1) + + +/* __PTHREAD_KEY_DESTRUCTORS is an array of destructors with + __PTHREAD_KEY_SIZE elements. If an element with index less than + __PTHREAD_KEY_COUNT is invalid, it shall contain the value + PTHREAD_KEY_INVALID which shall be distinct from NULL. + + Normally, we just add new keys to the end of the array and realloc + it as necessary. The pthread_key_create routine may decide to + rescan the array if __PTHREAD_KEY_FREE is large. */ +extern void (**__pthread_key_destructors) (void *arg); +extern int __pthread_key_size; +extern int __pthread_key_count; +/* Number of invalid elements in the array. Does not include elements + for which memory has been allocated but which have not yet been + used (i.e. those elements with indexes greater than + __PTHREAD_KEY_COUNT). */ +extern int __pthread_key_invalid_count; + +/* Protects the above variables. This must be a recursive lock: the + destructors may call pthread_key_delete. */ +extern pthread_mutex_t __pthread_key_lock; + +#include <assert.h> + +static inline void +__pthread_key_lock_ready (void) +{ + static pthread_once_t o = PTHREAD_ONCE_INIT; + + void do_init (void) + { + int err; + pthread_mutexattr_t attr; + + err = __pthread_mutexattr_init (&attr); + assert_perror (err); + + err = __pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE); + assert_perror (err); + + err = _pthread_mutex_init (&__pthread_key_lock, &attr); + assert_perror (err); + + err = __pthread_mutexattr_destroy (&attr); + assert_perror (err); + } + + __pthread_once (&o, do_init); +} |