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Diffstat (limited to 'nuttx/sched/sched_removeblocked.c')
-rw-r--r-- | nuttx/sched/sched_removeblocked.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/nuttx/sched/sched_removeblocked.c b/nuttx/sched/sched_removeblocked.c new file mode 100644 index 000000000..8d5a127d2 --- /dev/null +++ b/nuttx/sched/sched_removeblocked.c @@ -0,0 +1,111 @@ +/************************************************************************ + * sched/sched_removeblocked.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_removeblocked + * + * Description: + * This function removes a TCB from one of the blocked state task + * lists as inferred from the task_state inside the TCB. + * + * Inputs: + * btcb - Points to the TCB that is blocked + * + * Return Value: + * None + * + * Assumptions: + * - The caller has established a critical section before + * calling this function. + * + ************************************************************************/ + +void sched_removeblocked(FAR _TCB *btcb) +{ + tstate_t task_state = btcb->task_state; + + /* Make sure the TCB is in a valid blocked state */ + + ASSERT(task_state >= FIRST_BLOCKED_STATE && + task_state <= LAST_BLOCKED_STATE); + + /* Remove the TCB from the blocked task list associated + * with this state + */ + + dq_rem((FAR dq_entry_t*)btcb, (dq_queue_t*)g_tasklisttable[task_state].list); + + /* Make sure the TCB's state corresponds to not being in + * any list + */ + + btcb->task_state = TSTATE_TASK_INVALID; +} + |