116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
/*
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* File : pthread_tls.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006 - 2010, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2010-10-26 Bernard the first version
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*/
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#include <pthread.h>
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#include "pthread_internal.h"
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_pthread_key_data_t _thread_keys[PTHREAD_KEY_MAX];
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void pthread_key_system_init()
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{
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rt_memset(&_thread_keys[0], 0, sizeof(_thread_keys));
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}
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void *pthread_getspecific(pthread_key_t key)
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{
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struct _pthread_data* ptd;
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ptd = _pthread_get_data(rt_thread_self());
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RT_ASSERT(ptd != NULL);
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if (ptd->tls == NULL)
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return NULL;
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if ((key < PTHREAD_KEY_MAX) && (_thread_keys[key].is_used))
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return ptd->tls[key];
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return NULL;
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}
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RTM_EXPORT(pthread_getspecific);
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int pthread_setspecific(pthread_key_t key, const void *value)
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{
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struct _pthread_data* ptd;
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ptd = _pthread_get_data(rt_thread_self());
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RT_ASSERT(ptd != NULL);
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/* check tls area */
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if (ptd->tls == NULL)
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{
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ptd->tls = (void**)rt_malloc(sizeof(void*) * PTHREAD_KEY_MAX);
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}
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if ((key < PTHREAD_KEY_MAX) && _thread_keys[key].is_used)
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{
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ptd->tls[key] = (void *)value;
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return 0;
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}
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return EINVAL;
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}
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RTM_EXPORT(pthread_setspecific);
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int pthread_key_create(pthread_key_t *key, void (*destructor)(void*))
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{
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rt_uint32_t index;
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rt_enter_critical();
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for (index = 0; index < PTHREAD_KEY_MAX; index ++)
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{
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if (_thread_keys[index].is_used == 0)
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{
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_thread_keys[index].is_used = 1;
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_thread_keys[index].destructor = destructor;
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*key = index;
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rt_exit_critical();
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return 0;
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}
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}
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rt_exit_critical();
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return EAGAIN;
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}
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RTM_EXPORT(pthread_key_create);
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int pthread_key_delete(pthread_key_t key)
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{
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if (key >= PTHREAD_KEY_MAX)
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return EINVAL;
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rt_enter_critical();
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_thread_keys[key].is_used = 0;
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_thread_keys[key].destructor = 0;
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rt_exit_critical();
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return 0;
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}
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RTM_EXPORT(pthread_key_delete);
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