diff options
Diffstat (limited to 'nuttx/sched/task_activate.c')
-rw-r--r-- | nuttx/sched/task_activate.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/nuttx/sched/task_activate.c b/nuttx/sched/task_activate.c new file mode 100644 index 000000000..bae2856a1 --- /dev/null +++ b/nuttx/sched/task_activate.c @@ -0,0 +1,117 @@ +/**************************************************************************** + * sched/task_activate.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 <debug.h> + +#include <nuttx/arch.h> + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Type Declarations + ****************************************************************************/ + +/**************************************************************************** + * Global Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: task_activate + * + * Description: + * This function activates tasks initialized by task_schedsetup(). Without + * activation, a task is ineligible for execution by the scheduler. + * + * Input Parameters: + * tcb - The TCB for the task for the task (same as the task_init argument). + * + * Return Value: + * Always returns OK + * + ****************************************************************************/ + +int task_activate(FAR _TCB *tcb) +{ + irqstate_t flags = irqsave(); + +#ifdef CONFIG_SCHED_INSTRUMENTATION + + /* Check if this is really a re-start */ + + if (tcb->task_state != TSTATE_TASK_INACTIVE) + { + /* Inform the instrumentation layer that the task + * has stopped + */ + + sched_note_stop(tcb); + } + + /* Inform the instrumentation layer that the task + * has started + */ + + sched_note_start(tcb); +#endif + + up_unblock_task(tcb); + irqrestore(flags); + return OK; +} |