aboutsummaryrefslogtreecommitdiff
path: root/nuttx/sched/sched_addreadytorun.c
diff options
context:
space:
mode:
Diffstat (limited to 'nuttx/sched/sched_addreadytorun.c')
-rw-r--r--nuttx/sched/sched_addreadytorun.c149
1 files changed, 0 insertions, 149 deletions
diff --git a/nuttx/sched/sched_addreadytorun.c b/nuttx/sched/sched_addreadytorun.c
deleted file mode 100644
index 1e1829343..000000000
--- a/nuttx/sched/sched_addreadytorun.c
+++ /dev/null
@@ -1,149 +0,0 @@
-/****************************************************************************
- * sched/sched_addreadytorun.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 <stdbool.h>
-#include <queue.h>
-#include <assert.h>
-
-#include "os_internal.h"
-
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-/****************************************************************************
- * Private Type Declarations
- ****************************************************************************/
-
-/****************************************************************************
- * Global Variables
- ****************************************************************************/
-
-/****************************************************************************
- * Private Variables
- ****************************************************************************/
-
-/****************************************************************************
- * Private Function Prototypes
- ****************************************************************************/
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: sched_addreadytorun
- *
- * Description:
- * This function adds a TCB to the ready to run
- * list. If the currently active task has preemption disabled
- * and the new TCB would cause this task to be preempted, the
- * new task is added to the g_pendingtasks list instead. The
- * pending tasks will be made ready-to-run when preemption
- * is unlocked.
- *
- * Inputs:
- * btcb - Points to the blocked TCB that is ready-to-run
- *
- * Return Value:
- * true if the currently active task (the head of the g_readytorun list)
- * has changed.
- *
- * Assumptions:
- * - The caller has established a critical section before
- * calling this function (calling sched_lock() first is NOT
- * a good idea -- use irqsave()).
- * - The caller has already removed the input rtcb from
- * whatever list it was in.
- * - The caller handles the condition that occurs if the
- * the head of the g_readytorun list is changed.
- *
- ****************************************************************************/
-
-bool sched_addreadytorun(FAR _TCB *btcb)
-{
- FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head;
- bool ret;
-
- /* Check if pre-emption is disabled for the current running task and if
- * the new ready-to-run task would cause the current running task to be
- * preempted.
- */
-
- if (rtcb->lockcount && rtcb->sched_priority < btcb->sched_priority)
- {
- /* Yes. Preemption would occur! Add the new ready-to-run task to the
- * g_pendingtasks task list for now.
- */
-
- sched_addprioritized(btcb, (FAR dq_queue_t*)&g_pendingtasks);
- btcb->task_state = TSTATE_TASK_PENDING;
- ret = false;
- }
-
- /* Otherwise, add the new task to the g_readytorun task list */
-
- else if (sched_addprioritized(btcb, (FAR dq_queue_t*)&g_readytorun))
- {
- /* Inform the instrumentation logic that we are switching tasks */
-
- sched_note_switch(rtcb, btcb);
-
- /* The new btcb was added at the head of the g_readytorun list. It
- * is now to new active task!
- */
-
- ASSERT(!rtcb->lockcount && btcb->flink != NULL);
-
- btcb->task_state = TSTATE_TASK_RUNNING;
- btcb->flink->task_state = TSTATE_TASK_READYTORUN;
- ret = true;
- }
- else
- {
- /* The new btcb was added in the middle of the g_readytorun list */
-
- btcb->task_state = TSTATE_TASK_READYTORUN;
- ret = false;
- }
-
- return ret;
-}