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Diffstat (limited to 'nuttx/sched/sched_mergepending.c')
| -rw-r--r-- | nuttx/sched/sched_mergepending.c | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/nuttx/sched/sched_mergepending.c b/nuttx/sched/sched_mergepending.c deleted file mode 100644 index 71d575c23..000000000 --- a/nuttx/sched/sched_mergepending.c +++ /dev/null @@ -1,177 +0,0 @@ -/************************************************************************ - * sched/sched_mergepending.c - * - * Copyright (C) 2007, 2009, 2012 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 <sched.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_mergepending - * - * Description: - * This function merges the prioritized g_pendingtasks list into the - * prioritized g_readytorun task list. - * - * Inputs: - * None - * - * Return Value: - * true if the head of the g_readytorun task 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 handles the condition that occurs if the - * the head of the sched_mergTSTATE_TASK_PENDINGs is changed. - * - ************************************************************************/ - -bool sched_mergepending(void) -{ - FAR _TCB *pndtcb; - FAR _TCB *pndnext; - FAR _TCB *rtrtcb; - FAR _TCB *rtrprev; - bool ret = false; - - /* Initialize the inner search loop */ - - rtrtcb = (FAR _TCB*)g_readytorun.head; - - /* Process every TCB in the g_pendingtasks list */ - - for (pndtcb = (FAR _TCB*)g_pendingtasks.head; pndtcb; pndtcb = pndnext) - { - pndnext = pndtcb->flink; - - /* Search the g_readytorun list to find the location to insert the - * new pndtcb. Each is list is maintained in ascending sched_priority - * order. - */ - - for (; - (rtrtcb && pndtcb->sched_priority <= rtrtcb->sched_priority); - rtrtcb = rtrtcb->flink); - - /* Add the pndtcb to the spot found in the list. Check if the - * pndtcb goes at the ends of the g_readytorun list. This would be - * error condition since the idle test must always be at the end of - * the g_readytorun list! - */ - - if (!rtrtcb) - { - PANIC(OSERR_NOIDLETASK); - } - else - { - /* The pndtcb goes just before rtrtcb */ - - rtrprev = rtrtcb->blink; - if (!rtrprev) - { - /* Special case: Inserting pndtcb at the head of the list */ - /* Inform the instrumentation layer that we are switching tasks */ - - sched_note_switch(rtrtcb, pndtcb); - - /* Then insert at the head of the list */ - - pndtcb->flink = rtrtcb; - pndtcb->blink = NULL; - rtrtcb->blink = pndtcb; - g_readytorun.head = (FAR dq_entry_t*)pndtcb; - rtrtcb->task_state = TSTATE_TASK_READYTORUN; - pndtcb->task_state = TSTATE_TASK_RUNNING; - ret = true; - } - else - { - /* Insert in the middle of the list */ - - pndtcb->flink = rtrtcb; - pndtcb->blink = rtrprev; - rtrprev->flink = pndtcb; - rtrtcb->blink = pndtcb; - pndtcb->task_state = TSTATE_TASK_READYTORUN; - } - } - - /* Set up for the next time through */ - - rtrtcb = pndtcb; - } - - /* Mark the input list empty */ - - g_pendingtasks.head = NULL; - g_pendingtasks.tail = NULL; - - return ret; -} |