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-rw-r--r--nuttx/sched/sched_setpriority.c233
1 files changed, 0 insertions, 233 deletions
diff --git a/nuttx/sched/sched_setpriority.c b/nuttx/sched/sched_setpriority.c
deleted file mode 100644
index 6aa0789ea..000000000
--- a/nuttx/sched/sched_setpriority.c
+++ /dev/null
@@ -1,233 +0,0 @@
-/****************************************************************************
- * sched/sched_setpriority.c
- *
- * Copyright (C) 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 <stdint.h>
-#include <sched.h>
-#include <errno.h>
-#include <nuttx/arch.h>
-
-#include "os_internal.h"
-
-/****************************************************************************
- * Definitions
- ****************************************************************************/
-
-/****************************************************************************
- * Private Type Declarations
- ****************************************************************************/
-
-/****************************************************************************
- * Global Variables
- ****************************************************************************/
-
-/****************************************************************************
- * Private Variables
- ****************************************************************************/
-
-/****************************************************************************
- * Private Function Prototypes
- ****************************************************************************/
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: sched_setpriority
- *
- * Description:
- * This function sets the priority of a specified task.
- *
- * NOTE: Setting a task's priority to the same value has a similar effect
- * to sched_yield() -- The task will be moved to after all other tasks
- * with the same priority.
- *
- * Inputs:
- * tcb - the TCB of task to reprioritize.
- * sched_priority - The new task priority
- *
- * Return Value:
- * On success, sched_setparam() returns 0 (OK). On error, -1 (ERROR) is
- * returned, and errno is set appropriately.
- *
- * EINVAL The parameter 'param' is invalid or does not make sense for the
- * current scheduling policy.
- * EPERM The calling task does not have appropriate privileges.
- * ESRCH The task whose ID is pid could not be found.
- *
- * Assumptions:
- *
- ****************************************************************************/
-
-int sched_setpriority(FAR _TCB *tcb, int sched_priority)
-{
- FAR _TCB *rtcb = (FAR _TCB*)g_readytorun.head;
- tstate_t task_state;
- irqstate_t saved_state;
-
- /* Verify that the requested priority is in the valid range */
-
- if (sched_priority < SCHED_PRIORITY_MIN ||
- sched_priority > SCHED_PRIORITY_MAX)
- {
- errno = EINVAL;
- return ERROR;
- }
-
- /* We need to assure that there there is no interrupt activity while
- * performing the following.
- */
-
- saved_state = irqsave();
-
- /* There are four cases that must be considered: */
-
- task_state = tcb->task_state;
- switch (task_state)
- {
- /* CASE 1. The task is running or ready-to-run and a context switch
- * may be caused by the re-prioritization
- */
-
- case TSTATE_TASK_RUNNING:
-
- /* A context switch will occur if the new priority of the running
- * task becomes less than OR EQUAL TO the next highest priority
- * ready to run task.
- */
-
- if (sched_priority <= tcb->flink->sched_priority)
- {
- /* A context switch will occur. */
-
- up_reprioritize_rtr(tcb, (uint8_t)sched_priority);
- }
-
- /* Otherwise, we can just change priority since it has no effect */
-
- else
- {
- /* Change the task priority */
-
- tcb->sched_priority = (uint8_t)sched_priority;
- }
- break;
-
- /* CASE 2. The task is running or ready-to-run and a context switch
- * may be caused by the re-prioritization
- */
-
- case TSTATE_TASK_READYTORUN:
-
- /* A context switch will occur if the new priority of the ready-to
- * run task is (strictly) greater than the current running task
- */
-
- if (sched_priority > rtcb->sched_priority)
- {
- /* A context switch will occur. */
-
- up_reprioritize_rtr(tcb, (uint8_t)sched_priority);
- }
-
- /* Otherwise, we can just change priority and re-schedule (since it
- * have no other effect).
- */
-
- else
- {
- /* Remove the TCB from the ready-to-run task list */
-
- ASSERT(!sched_removereadytorun(tcb));
-
- /* Change the task priority */
-
- tcb->sched_priority = (uint8_t)sched_priority;
-
- /* Put it back into the ready-to-run task list */
-
- ASSERT(!sched_addreadytorun(tcb));
- }
- break;
-
- /* CASE 3. The task is not in the ready to run list. Changing its
- * Priority cannot effect the currently executing task.
- */
-
- default:
-
- /* CASE 3a. The task resides in a prioritized list. */
-
- if (g_tasklisttable[task_state].prioritized)
- {
- /* Remove the TCB from the prioritized task list */
-
- dq_rem((FAR dq_entry_t*)tcb, (FAR dq_queue_t*)g_tasklisttable[task_state].list);
-
- /* Change the task priority */
-
- tcb->sched_priority = (uint8_t)sched_priority;
-
- /* Put it back into the prioritized list at the correct
- * position
- */
-
- sched_addprioritized(tcb, (FAR dq_queue_t*)g_tasklisttable[task_state].list);
- }
-
- /* CASE 3b. The task resides in a non-prioritized list. */
-
- else
- {
- /* Just change the task's priority */
-
- tcb->sched_priority = (uint8_t)sched_priority;
- }
- break;
- }
-
- irqrestore(saved_state);
- return OK;
-}
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