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author | px4dev <px4@purgatory.org> | 2012-08-04 15:12:36 -0700 |
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committer | px4dev <px4@purgatory.org> | 2012-08-04 15:12:36 -0700 |
commit | 8a365179eafdf3aea98e60ab9f5882b200d4c759 (patch) | |
tree | 4f38d6d4cd80bd0b6e22e2bb534c3f117ce44e56 /nuttx/sched/pthread_setspecific.c | |
download | px4-firmware-8a365179eafdf3aea98e60ab9f5882b200d4c759.tar.gz px4-firmware-8a365179eafdf3aea98e60ab9f5882b200d4c759.tar.bz2 px4-firmware-8a365179eafdf3aea98e60ab9f5882b200d4c759.zip |
Fresh import of the PX4 firmware sources.
Diffstat (limited to 'nuttx/sched/pthread_setspecific.c')
-rw-r--r-- | nuttx/sched/pthread_setspecific.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/nuttx/sched/pthread_setspecific.c b/nuttx/sched/pthread_setspecific.c new file mode 100644 index 000000000..33fb4aeeb --- /dev/null +++ b/nuttx/sched/pthread_setspecific.c @@ -0,0 +1,137 @@ +/**************************************************************************** + * sched/pthread_setspecific.c + * + * Copyright (C) 2007-2009 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * 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 <nuttx/config.h> + +#include <sched.h> +#include <errno.h> +#include <debug.h> +#include "os_internal.h" +#include "pthread_internal.h" + +/**************************************************************************** + * 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 void *value) +{ +#if CONFIG_NPTHREAD_KEYS > 0 + FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head; + int ret = EINVAL; + + /* Check if the key is valid. */ + + if (key < g_pthread_num_keys) + { + /* Store the data in the TCB. */ + + rtcb->pthread_data[key] = value; + + /* Return success. */ + + ret = OK; + } + + return ret; +#else + return ENOSYS; +#endif +} + |