/**************************************************************************** * sched/pthread/pthread_setspecific.c * * Copyright (C) 2007-2009, 2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include "sched/sched.h" #include "pthread/pthread.h" /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /**************************************************************************** * Private Type Declarations ****************************************************************************/ /**************************************************************************** * Global Variables ****************************************************************************/ /**************************************************************************** * Private Variables ****************************************************************************/ /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: pthread_setspecific * * Description: * The pthread_setspecific() function associates a thread- * specific value with a key obtained via a previous call * to pthread_key_create(). Different threads may bind * different values to the same key. These values are * typically pointers to blocks of dynamically allocated * memory that have been reserved for use by the calling * thread. * * The effect of calling pthread_setspecific() with * with a key value not obtained from pthread_create() or * after a key has been deleted with pthread_key_delete() * is undefined. * * Parameters: * key = The data key to get or set * value = The value to bind to the key. * * Return Value: * If successful, pthread_setspecific() will return zero (OK). * Otherwise, an error number will be returned: * * ENOMEM - Insufficient memory exists to associate * the value with the key. * EINVAL - The key value is invalid. * * Assumptions: * * POSIX Compatibility: * int pthread_setspecific(pthread_key_t key, void *value) * void *pthread_getspecific(pthread_key_t key) * * - Both calling pthread_setspecific() and pthread_getspecific() * may be called from a thread-specific data destructor * function. * ****************************************************************************/ int pthread_setspecific(pthread_key_t key, FAR const void *value) { #if CONFIG_NPTHREAD_KEYS > 0 FAR struct pthread_tcb_s *rtcb = (FAR struct pthread_tcb_s*)g_readytorun.head; FAR struct task_group_s *group = rtcb->cmn.group; int ret = EINVAL; DEBUGASSERT(group && (rtcb->cmn.flags & TCB_FLAG_TTYPE_MASK) == TCB_FLAG_TTYPE_PTHREAD); /* Check if the key is valid. */ if (key < group->tg_nkeys) { /* Store the data in the TCB. */ rtcb->pthread_data[key] = (FAR void*)value; /* Return success. */ ret = OK; } return ret; #else return ENOSYS; #endif }