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Diffstat (limited to 'nuttx/lib/pthread/pthread_barrierattrsetpshared.c')
-rw-r--r-- | nuttx/lib/pthread/pthread_barrierattrsetpshared.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/nuttx/lib/pthread/pthread_barrierattrsetpshared.c b/nuttx/lib/pthread/pthread_barrierattrsetpshared.c new file mode 100644 index 000000000..a982eea39 --- /dev/null +++ b/nuttx/lib/pthread/pthread_barrierattrsetpshared.c @@ -0,0 +1,111 @@ +/******************************************************************************** + * lib/pthread/pthread_barrierattrsetpshared.c + * + * Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 <pthread.h> +#include <errno.h> +#include <debug.h> + +/******************************************************************************** + * Definitions + ********************************************************************************/ + +/******************************************************************************** + * Private Type Declarations + ********************************************************************************/ + +/******************************************************************************** + * Global Variables + ********************************************************************************/ + +/******************************************************************************** + * Private Variables + ********************************************************************************/ + +/******************************************************************************** + * Private Function Prototypes + ********************************************************************************/ + +/******************************************************************************** + * Public Functions + ********************************************************************************/ + +/******************************************************************************** + * Function: pthread_barrierattr_setpshared + * + * Description: + * The process-shared attribute is set to PTHREAD_PROCESS_SHARED to permit a + * barrier to be operated upon by any thread that has access to the memory where + * the barrier is allocated. If the process-shared attribute is + * PTHREAD_PROCESS_PRIVATE, the barrier can only be operated upon by threads + * created within the same process as the thread that initialized the barrier. + * If threads of different processes attempt to operate on such a barrier, the + * behavior is undefined. The default value of the attribute is + * PTHREAD_PROCESS_PRIVATE. + * + * Both constants PTHREAD_PROCESS_SHARED and PTHREAD_PROCESS_PRIVATE are defined + * in pthread.h. + * + * Parameters: + * attr - barrier attributes to be modified. + * pshared - the new value of the pshared attribute. + * + * Return Value: + * 0 (OK) on success or EINVAL if either attr is invalid or pshared is not one + * of PTHREAD_PROCESS_SHARED or PTHREAD_PROCESS_PRIVATE. + * + * Assumptions: + * + ********************************************************************************/ + +int pthread_barrierattr_setpshared(FAR pthread_barrierattr_t *attr, int pshared) +{ + int ret = OK; + + if (!attr || (pshared != PTHREAD_PROCESS_SHARED && pshared != PTHREAD_PROCESS_PRIVATE)) + { + ret = EINVAL; + } + else + { + attr->pshared = pshared; + } + return ret; +} |