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Diffstat (limited to 'nuttx/sched/group_create.c')
-rw-r--r-- | nuttx/sched/group_create.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/nuttx/sched/group_create.c b/nuttx/sched/group_create.c new file mode 100644 index 000000000..d036b9084 --- /dev/null +++ b/nuttx/sched/group_create.c @@ -0,0 +1,111 @@ +/***************************************************************************** + * sched/group_create.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 <assert.h> +#include <errno.h> +#include <debug.h> + +#include <nuttx/kmalloc.h> + +#ifdef HAVE_TASK_GROUP + +/***************************************************************************** + * Pre-processor Definitions + *****************************************************************************/ + +/***************************************************************************** + * Private Types + *****************************************************************************/ + +/***************************************************************************** + * Private Data + *****************************************************************************/ + +/***************************************************************************** + * Private Functions + *****************************************************************************/ + +/***************************************************************************** + * Public Functions + *****************************************************************************/ + +/***************************************************************************** + * Name: group_create + * + * Description: + * Create and initialize a new task group structure for the specified TCB. + * This function is called as part of the task creation sequence. + * + * Parameters: + * tcb - The tcb in need of the task group. + * + * Return Value: + * 0 (OK) on success; a negated errno value on failure. + * + * Assumptions: + * Called during task creation in a safe context. No special precautions + * are required here. + * + *****************************************************************************/ + +int group_create(FAR _TCB *tcb) +{ + FAR struct task_group_s *group; + + DEBUGASSERT(tcb && !tcb->group); + + /* Allocate the group structure */ + + group = (FAR struct task_group_s *)kzalloc(sizeof(struct task_group_s)); + if (!group) + { + return -ENOMEM; + } + + /* Initialize the group structure and assign it to the tcb */ + + group->tg_crefs = 1; + tcb->group = group; + return OK; +} + +#endif /* HAVE_TASK_GROUP */ |