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Diffstat (limited to 'nuttx/sched/sched_addreadytorun.c')
-rw-r--r-- | nuttx/sched/sched_addreadytorun.c | 149 |
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; -} |