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Diffstat (limited to 'nuttx/libc/pthread/pthread_attrinit.c')
-rw-r--r-- | nuttx/libc/pthread/pthread_attrinit.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/nuttx/libc/pthread/pthread_attrinit.c b/nuttx/libc/pthread/pthread_attrinit.c new file mode 100644 index 000000000..427a582b9 --- /dev/null +++ b/nuttx/libc/pthread/pthread_attrinit.c @@ -0,0 +1,123 @@ +/**************************************************************************** + * libc/pthread/pthread_attrinit.c + * + * Copyright (C) 2007-2009, 2011 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 <pthread.h> +#include <string.h> +#include <debug.h> +#include <errno.h> + +#include <nuttx/pthread.h> + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Type Declarations + ****************************************************************************/ + +/**************************************************************************** + * Global Variables + ****************************************************************************/ + +/* Default pthread attributes (see included/nuttx/pthread.h). When configured + * to build separate kernel- and user-address spaces, this global is + * duplicated in each address spaced. This copy can only be shared within + * the user address space. + */ + +#if defined(CONFIG_NUTTX_KERNEL) && !defined(__KERNEL__) +pthread_attr_t g_default_pthread_attr = PTHREAD_ATTR_INITIALIZER; +#endif + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Function: pthread_attr_init + * + * Description: + * Initializes a thread attributes object (attr) with + * default values for all of the individual attributes + * used by a given implementation. + * + * Parameters: + * attr + * + * Return Value: + * 0 on success, otherwise an error number + * + * Assumptions: + * + ****************************************************************************/ + +int pthread_attr_init(FAR pthread_attr_t *attr) +{ + int ret = OK; + + sdbg("attr=0x%p\n", attr); + if (!attr) + { + ret = ENOMEM; + } + else + { + /* Set the child thread priority to be the default + * priority. Set the child stack size to some arbitrary + * default value. + */ + + memcpy(attr, &g_default_pthread_attr, sizeof(pthread_attr_t)); + } + + sdbg("Returning %d\n", ret); + return ret; +} + |