rt-thread/components/pthreads/pthread_tls.c

83 lines
1.6 KiB
C

#include <pthread.h>
#include "pthread_internal.h"
_pthread_key_data_t _thread_keys[PTHREAD_KEY_MAX];
void pthread_key_system_init()
{
rt_memset(&_thread_keys[0], 0, sizeof(_thread_keys));
}
void *pthread_getspecific(pthread_key_t key)
{
struct _pthread_data* ptd;
ptd = _pthread_get_data(rt_thread_self());
RT_ASSERT(ptd != NULL);
if (ptd->tls == NULL) return NULL;
if ((key < PTHREAD_KEY_MAX) && (_thread_keys[key].is_used))
return ptd->tls[key];
return NULL;
}
int pthread_setspecific(pthread_key_t key, const void *value)
{
struct _pthread_data* ptd;
ptd = _pthread_get_data(rt_thread_self());
RT_ASSERT(ptd != NULL);
/* check tls area */
if (ptd->tls == NULL)
{
ptd->tls = (void**)rt_malloc(sizeof(void*) * PTHREAD_KEY_MAX);
}
if ((key < PTHREAD_KEY_MAX) && _thread_keys[key].is_used)
{
ptd->tls[key] = (void *)value;
return 0;
}
return EINVAL;
}
int pthread_key_create(pthread_key_t *key, void (*destructor)(void*))
{
rt_uint32_t index;
rt_enter_critical();
for (index = 0; index < PTHREAD_KEY_MAX; index ++)
{
if (_thread_keys[index].is_used == 0)
{
_thread_keys[index].is_used = 1;
_thread_keys[index].destructor = destructor;
*key = index;
rt_exit_critical();
return 0;
}
}
rt_exit_critical();
return EAGAIN;
}
int pthread_key_delete(pthread_key_t key)
{
if (key >= PTHREAD_KEY_MAX) return EINVAL;
rt_enter_critical();
_thread_keys[key].is_used = 0;
_thread_keys[key].destructor = 0;
rt_exit_critical();
return 0;
}