diff options
| -rw-r--r-- | libpthread/linuxthreads/specific.c | 225 |
1 files changed, 123 insertions, 102 deletions
diff --git a/libpthread/linuxthreads/specific.c b/libpthread/linuxthreads/specific.c index 3df0e4720..0fbc6c9da 100644 --- a/libpthread/linuxthreads/specific.c +++ b/libpthread/linuxthreads/specific.c @@ -12,15 +12,19 @@ /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ /* GNU Library General Public License for more details. */ -/* mods for uClibc: removed strong_alias'es */ - /* Thread-specific data */ +#include <features.h> +#define __USE_GNU #include <errno.h> #include <stddef.h> #include <stdlib.h> #include "pthread.h" #include "internals.h" +#include "spinlock.h" +#include "restart.h" +#include <bits/libc-lock.h> + /* Table of keys. */ @@ -39,146 +43,163 @@ static pthread_mutex_t pthread_keys_mutex = PTHREAD_MUTEX_INITIALIZER; int pthread_key_create(pthread_key_t * key, destr_function destr) { - int i; - - pthread_mutex_lock(&pthread_keys_mutex); - for (i = 0; i < PTHREAD_KEYS_MAX; i++) { - if (! pthread_keys[i].in_use) { - /* Mark key in use */ - pthread_keys[i].in_use = 1; - pthread_keys[i].destr = destr; - pthread_mutex_unlock(&pthread_keys_mutex); - *key = i; - return 0; + int i; + + pthread_mutex_lock(&pthread_keys_mutex); + for (i = 0; i < PTHREAD_KEYS_MAX; i++) { + if (! pthread_keys[i].in_use) { + /* Mark key in use */ + pthread_keys[i].in_use = 1; + pthread_keys[i].destr = destr; + pthread_mutex_unlock(&pthread_keys_mutex); + *key = i; + return 0; + } } - } - pthread_mutex_unlock(&pthread_keys_mutex); - return EAGAIN; + pthread_mutex_unlock(&pthread_keys_mutex); + return EAGAIN; } -//strong_alias (__pthread_key_create, pthread_key_create) /* Delete a key */ - int pthread_key_delete(pthread_key_t key) { - pthread_descr self = thread_self(); - pthread_descr th; - unsigned int idx1st, idx2nd; + pthread_descr self = thread_self(); + + pthread_mutex_lock(&pthread_keys_mutex); + if (key >= PTHREAD_KEYS_MAX || !pthread_keys[key].in_use) { + pthread_mutex_unlock(&pthread_keys_mutex); + return EINVAL; + } + pthread_keys[key].in_use = 0; + pthread_keys[key].destr = NULL; + + /* Set the value of the key to NULL in all running threads, so + that if the key is reallocated later by pthread_key_create, its + associated values will be NULL in all threads. + Do nothing if no threads have been created yet. */ + if (__pthread_manager_request != -1) + { + pthread_descr th; + unsigned int idx1st, idx2nd; + + idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE; + idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE; + th = self; + do { + /* If the thread already is terminated don't modify the memory. */ + if (!th->p_terminated && th->p_specific[idx1st] != NULL) + th->p_specific[idx1st][idx2nd] = NULL; + th = th->p_nextlive; + } while (th != self); + } - pthread_mutex_lock(&pthread_keys_mutex); - if (key >= PTHREAD_KEYS_MAX || !pthread_keys[key].in_use) { pthread_mutex_unlock(&pthread_keys_mutex); - return EINVAL; - } - pthread_keys[key].in_use = 0; - pthread_keys[key].destr = NULL; - /* Set the value of the key to NULL in all running threads, so - that if the key is reallocated later by pthread_key_create, its - associated values will be NULL in all threads. */ - idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE; - idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE; - th = self; - do { - /* If the thread already is terminated don't modify the memory. */ - if (!th->p_terminated && th->p_specific[idx1st] != NULL) - th->p_specific[idx1st][idx2nd] = NULL; - th = th->p_nextlive; - } while (th != self); - pthread_mutex_unlock(&pthread_keys_mutex); - return 0; + return 0; } /* Set the value of a key */ int pthread_setspecific(pthread_key_t key, const void * pointer) { - pthread_descr self = thread_self(); - unsigned int idx1st, idx2nd; - - if (key >= PTHREAD_KEYS_MAX || !pthread_keys[key].in_use) - return EINVAL; - idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE; - idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE; - if (THREAD_GETMEM_NC(self, p_specific[idx1st]) == NULL) { - void *newp = calloc(PTHREAD_KEY_2NDLEVEL_SIZE, sizeof (void *)); - if (newp == NULL) - return ENOMEM; - THREAD_SETMEM_NC(self, p_specific[idx1st], newp); - } - THREAD_GETMEM_NC(self, p_specific[idx1st])[idx2nd] = (void *) pointer; - return 0; + pthread_descr self = thread_self(); + unsigned int idx1st, idx2nd; + + if (key >= PTHREAD_KEYS_MAX || !pthread_keys[key].in_use) + return EINVAL; + idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE; + idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE; + if (THREAD_GETMEM_NC(self, p_specific[idx1st]) == NULL) { + void *newp = calloc(PTHREAD_KEY_2NDLEVEL_SIZE, sizeof (void *)); + if (newp == NULL) + return ENOMEM; + THREAD_SETMEM_NC(self, p_specific[idx1st], newp); + } + THREAD_GETMEM_NC(self, p_specific[idx1st])[idx2nd] = (void *) pointer; + return 0; } -//strong_alias (__pthread_setspecific, pthread_setspecific) /* Get the value of a key */ void * pthread_getspecific(pthread_key_t key) { - pthread_descr self = thread_self(); - unsigned int idx1st, idx2nd; - - if (key >= PTHREAD_KEYS_MAX) - return NULL; - idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE; - idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE; - if (THREAD_GETMEM_NC(self, p_specific[idx1st]) == NULL - || !pthread_keys[key].in_use) - return NULL; - return THREAD_GETMEM_NC(self, p_specific[idx1st])[idx2nd]; + pthread_descr self = thread_self(); + unsigned int idx1st, idx2nd; + + if (key >= PTHREAD_KEYS_MAX) + return NULL; + idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE; + idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE; + if (THREAD_GETMEM_NC(self, p_specific[idx1st]) == NULL + || !pthread_keys[key].in_use) + return NULL; + return THREAD_GETMEM_NC(self, p_specific[idx1st])[idx2nd]; } -//strong_alias (__pthread_getspecific, pthread_getspecific) /* Call the destruction routines on all keys */ void __pthread_destroy_specifics() { - pthread_descr self = thread_self(); - int i, j, round, found_nonzero; - destr_function destr; - void * data; - - for (round = 0, found_nonzero = 1; - found_nonzero && round < PTHREAD_DESTRUCTOR_ITERATIONS; - round++) { - found_nonzero = 0; - for (i = 0; i < PTHREAD_KEY_1STLEVEL_SIZE; i++) - if (THREAD_GETMEM_NC(self, p_specific[i]) != NULL) - for (j = 0; j < PTHREAD_KEY_2NDLEVEL_SIZE; j++) { - destr = pthread_keys[i * PTHREAD_KEY_2NDLEVEL_SIZE + j].destr; - data = THREAD_GETMEM_NC(self, p_specific[i])[j]; - if (destr != NULL && data != NULL) { - THREAD_GETMEM_NC(self, p_specific[i])[j] = NULL; - destr(data); - found_nonzero = 1; - } - } - } - for (i = 0; i < PTHREAD_KEY_1STLEVEL_SIZE; i++) { - if (THREAD_GETMEM_NC(self, p_specific[i]) != NULL) - free(THREAD_GETMEM_NC(self, p_specific[i])); - } + pthread_descr self = thread_self(); + int i, j, round, found_nonzero; + destr_function destr; + void * data; + + for (round = 0, found_nonzero = 1; + found_nonzero && round < PTHREAD_DESTRUCTOR_ITERATIONS; + round++) { + found_nonzero = 0; + for (i = 0; i < PTHREAD_KEY_1STLEVEL_SIZE; i++) + if (THREAD_GETMEM_NC(self, p_specific[i]) != NULL) + for (j = 0; j < PTHREAD_KEY_2NDLEVEL_SIZE; j++) { + destr = pthread_keys[i * PTHREAD_KEY_2NDLEVEL_SIZE + j].destr; + data = THREAD_GETMEM_NC(self, p_specific[i])[j]; + if (destr != NULL && data != NULL) { + THREAD_GETMEM_NC(self, p_specific[i])[j] = NULL; + destr(data); + found_nonzero = 1; + } + } + } + __pthread_lock(THREAD_GETMEM(self, p_lock), self); + for (i = 0; i < PTHREAD_KEY_1STLEVEL_SIZE; i++) { + if (THREAD_GETMEM_NC(self, p_specific[i]) != NULL) { + free(THREAD_GETMEM_NC(self, p_specific[i])); + THREAD_SETMEM_NC(self, p_specific[i], NULL); + } + } + __pthread_unlock(THREAD_GETMEM(self, p_lock)); } -/* Thread-specific data for libc. */ +/* Thread-specific data for libc. */ +#if !(USE_TLS && HAVE___THREAD) static int libc_internal_tsd_set(enum __libc_tsd_key_t key, const void * pointer) { - pthread_descr self = thread_self(); + pthread_descr self = thread_self(); - THREAD_SETMEM_NC(self, p_libc_specific[key], (void *) pointer); - return 0; + THREAD_SETMEM_NC(self, p_libc_specific[key], (void *) pointer); + return 0; } int (*__libc_internal_tsd_set)(enum __libc_tsd_key_t key, const void * pointer) - = libc_internal_tsd_set; + = libc_internal_tsd_set; static void * libc_internal_tsd_get(enum __libc_tsd_key_t key) { - pthread_descr self = thread_self(); + pthread_descr self = thread_self(); - return THREAD_GETMEM_NC(self, p_libc_specific[key]); + return THREAD_GETMEM_NC(self, p_libc_specific[key]); } void * (*__libc_internal_tsd_get)(enum __libc_tsd_key_t key) - = libc_internal_tsd_get; + = libc_internal_tsd_get; +static void ** __attribute__ ((__const__)) +libc_internal_tsd_address (enum __libc_tsd_key_t key) +{ + pthread_descr self = thread_self(); + return &self->p_libc_specific[key]; +} +void **(*const __libc_internal_tsd_address) (enum __libc_tsd_key_t key) + __THROW __attribute__ ((__const__)) = libc_internal_tsd_address; +#endif |