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Diffstat (limited to 'nuttx/sched/sched_addprioritized.c')
| -rw-r--r-- | nuttx/sched/sched_addprioritized.c | 175 |
1 files changed, 0 insertions, 175 deletions
diff --git a/nuttx/sched/sched_addprioritized.c b/nuttx/sched/sched_addprioritized.c deleted file mode 100644 index 20178fb9c..000000000 --- a/nuttx/sched/sched_addprioritized.c +++ /dev/null @@ -1,175 +0,0 @@ -/************************************************************************ - * sched/sched_addprioritized.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 <stdint.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_addprioritized - * - * Description: - * This function adds a TCB to a prioritized TCB list. - * - * Inputs: - * tcb - Points to the TCB to add to the prioritized list - * list - Points to the prioritized list to add tcb to - * - * Return Value: - * true if the head of the 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 tcb from - * whatever list it was in. - * - The caller handles the condition that occurs if the - * the head of the task list is changed. - * - The caller must set the task_state field of the TCB to - * match the state associated with the list. - ************************************************************************/ - -bool sched_addprioritized(FAR _TCB *tcb, DSEG dq_queue_t *list) -{ - FAR _TCB *next; - FAR _TCB *prev; - uint8_t sched_priority = tcb->sched_priority; - bool ret = false; - - /* Lets do a sanity check before we get started. */ - - ASSERT(sched_priority >= SCHED_PRIORITY_MIN); - - /* Search the list to find the location to insert the new Tcb. - * Each is list is maintained in ascending sched_priority order. - */ - - for (next = (FAR _TCB*)list->head; - (next && sched_priority <= next->sched_priority); - next = next->flink); - - /* Add the tcb to the spot found in the list. Check if the tcb - * goes at the end of the list. NOTE: This could only happen if list - * is the g_pendingtasks list! - */ - - if (!next) - { - /* The tcb goes at the end of the list. */ - - prev = (FAR _TCB*)list->tail; - if (!prev) - { - /* Special case: The list is empty */ - - tcb->flink = NULL; - tcb->blink = NULL; - list->head = (FAR dq_entry_t*)tcb; - list->tail = (FAR dq_entry_t*)tcb; - ret = true; - } - else - { - /* The tcb goes at the end of a non-empty list */ - - tcb->flink = NULL; - tcb->blink = prev; - prev->flink = tcb; - list->tail = (FAR dq_entry_t*)tcb; - } - } - else - { - /* The tcb goes just before next */ - - prev = (FAR _TCB*)next->blink; - if (!prev) - { - /* Special case: Insert at the head of the list */ - - tcb->flink = next; - tcb->blink = NULL; - next->blink = tcb; - list->head = (FAR dq_entry_t*)tcb; - ret = true; - } - else - { - /* Insert in the middle of the list */ - - tcb->flink = next; - tcb->blink = prev; - prev->flink = tcb; - next->blink = tcb; - } - } - - return ret; -} - |