diff options
Diffstat (limited to 'nuttx/libc/spawn/lib_psa_init.c')
-rw-r--r-- | nuttx/libc/spawn/lib_psa_init.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/nuttx/libc/spawn/lib_psa_init.c b/nuttx/libc/spawn/lib_psa_init.c new file mode 100644 index 000000000..f76188c52 --- /dev/null +++ b/nuttx/libc/spawn/lib_psa_init.c @@ -0,0 +1,93 @@ +/**************************************************************************** + * libc/string/lib_psa_init.c + * + * Copyright (C) 2013 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 <spawn.h> +#include <assert.h> +#include <errno.h> + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: posix_spawnattr_init + * + * Description: + * The posix_spawnattr_init() function initializes the object referenced + * by attr, to an empty set of spawn attributes for subsequent use in a + * call to posix_spawn() or posix_spawnp(). + * + * Input Parameters: + * attr - The address of the spawn attributes to be initialized. + * + * Returned Value: + * On success, these functions return 0; on failure they return an error + * number from <errno.h>. + * + ****************************************************************************/ + +int posix_spawnattr_init(posix_spawnattr_t *attr) +{ + struct sched_param param; + int ret; + + DEBUGASSERT(attr); + + /* Flags: None */ + + attr->flags = 0; + + /* Set the default scheduler policy to the policy of this task */ + + attr->policy = sched_getscheduler(0); + + /* Set the default priority to the same priority as this task */ + + ret = sched_getparam(0, ¶m); + if (ret < 0) + { + return errno; + } + + attr->priority = param.sched_priority; + return OK; +} |