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author | px4dev <px4@purgatory.org> | 2012-08-04 15:12:36 -0700 |
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committer | px4dev <px4@purgatory.org> | 2012-08-04 15:12:36 -0700 |
commit | 8a365179eafdf3aea98e60ab9f5882b200d4c759 (patch) | |
tree | 4f38d6d4cd80bd0b6e22e2bb534c3f117ce44e56 /nuttx/sched/sched_addblocked.c | |
download | px4-firmware-8a365179eafdf3aea98e60ab9f5882b200d4c759.tar.gz px4-firmware-8a365179eafdf3aea98e60ab9f5882b200d4c759.tar.bz2 px4-firmware-8a365179eafdf3aea98e60ab9f5882b200d4c759.zip |
Fresh import of the PX4 firmware sources.
Diffstat (limited to 'nuttx/sched/sched_addblocked.c')
-rw-r--r-- | nuttx/sched/sched_addblocked.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/nuttx/sched/sched_addblocked.c b/nuttx/sched/sched_addblocked.c new file mode 100644 index 000000000..c0b80c8ac --- /dev/null +++ b/nuttx/sched/sched_addblocked.c @@ -0,0 +1,122 @@ +/************************************************************************ + * sched/sched_addblocked.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 <queue.h> +#include <assert.h> + +#include "os_internal.h" + +/************************************************************************ + * Definitions + ************************************************************************/ + +/************************************************************************ + * Private Type Declarations + ************************************************************************/ + +/************************************************************************ + * Global Variables + ************************************************************************/ + +/************************************************************************ + * Private Variables + ************************************************************************/ + +/************************************************************************ + * Private Function Prototypes + ************************************************************************/ + +/************************************************************************ + * Public Functions + ************************************************************************/ + +/************************************************************************ + * Name: sched_addblocked + * + * Description: + * This function adds a TCB to one of the blocked state task lists as + * inferred from task_state. + * + * Inputs: + * btcb - Points to the TCB that is blocked + * task_state - identifies the state of the blocked task + * + * Return Value: + * None + * + * Assumptions: + * - The caller has established a critical section before + * calling this function. + * + ************************************************************************/ + +void sched_addblocked(FAR _TCB *btcb, tstate_t task_state) +{ + /* Make sure that we received a valid blocked state */ + + ASSERT(task_state >= FIRST_BLOCKED_STATE && + task_state <= LAST_BLOCKED_STATE); + + /* Add the TCB to the blocked task list associated with this state. + * First, determine if the task is to be added to a prioritized task + * list + */ + + if (g_tasklisttable[task_state].prioritized) + { + /* Add the task to a prioritized list */ + + sched_addprioritized(btcb, + (FAR dq_queue_t*)g_tasklisttable[task_state].list); + } + else + { + /* Add the task to a non-prioritized list */ + + dq_addlast((FAR dq_entry_t*)btcb, + (FAR dq_queue_t*)g_tasklisttable[task_state].list); + } + + /* Make sure the TCB's state corresponds to the list */ + + btcb->task_state = task_state; +} + |