diff options
Diffstat (limited to 'nuttx/arch/arm/src/armv7-m/up_unblocktask.c')
| -rw-r--r-- | nuttx/arch/arm/src/armv7-m/up_unblocktask.c | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/nuttx/arch/arm/src/armv7-m/up_unblocktask.c b/nuttx/arch/arm/src/armv7-m/up_unblocktask.c deleted file mode 100644 index da10f0376..000000000 --- a/nuttx/arch/arm/src/armv7-m/up_unblocktask.c +++ /dev/null @@ -1,157 +0,0 @@ -/**************************************************************************** - * arch/arm/src/armv7-m/up_unblocktask.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 <sched.h> -#include <debug.h> -#include <nuttx/arch.h> - -#include "os_internal.h" -#include "clock_internal.h" -#include "up_internal.h" - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: up_unblock_task - * - * Description: - * A task is currently in an inactive task list - * but has been prepped to execute. Move the TCB to the - * ready-to-run list, restore its context, and start execution. - * - * Inputs: - * tcb: Refers to the tcb to be unblocked. This tcb is - * in one of the waiting tasks lists. It must be moved to - * the ready-to-run list and, if it is the highest priority - * ready to run taks, executed. - * - ****************************************************************************/ - -void up_unblock_task(_TCB *tcb) -{ - /* Verify that the context switch can be performed */ - - if ((tcb->task_state < FIRST_BLOCKED_STATE) || - (tcb->task_state > LAST_BLOCKED_STATE)) - { - PANIC(OSERR_BADUNBLOCKSTATE); - } - else - { - _TCB *rtcb = (_TCB*)g_readytorun.head; - - /* Remove the task from the blocked task list */ - - sched_removeblocked(tcb); - - /* Reset its timeslice. This is only meaningful for round - * robin tasks but it doesn't here to do it for everything - */ - -#if CONFIG_RR_INTERVAL > 0 - tcb->timeslice = CONFIG_RR_INTERVAL / MSEC_PER_TICK; -#endif - - /* Add the task in the correct location in the prioritized - * g_readytorun task list - */ - - if (sched_addreadytorun(tcb)) - { - /* The currently active task has changed! We need to do - * a context switch to the new task. - * - * Are we in an interrupt handler? - */ - - if (current_regs) - { - /* Yes, then we have to do things differently. - * Just copy the current_regs into the OLD rtcb. - */ - - up_savestate(rtcb->xcp.regs); - - /* Restore the exception context of the rtcb at the (new) head - * of the g_readytorun task list. - */ - - rtcb = (_TCB*)g_readytorun.head; - - /* Then switch contexts */ - - up_restorestate(rtcb->xcp.regs); - } - - /* No, then we will need to perform the user context switch */ - - else - { - /* Switch context to the context of the task at the head of the - * ready to run list. - */ - - _TCB *nexttcb = (_TCB*)g_readytorun.head; - up_switchcontext(rtcb->xcp.regs, nexttcb->xcp.regs); - - /* up_switchcontext forces a context switch to the task at the - * head of the ready-to-run list. It does not 'return' in the - * normal sense. When it does return, it is because the blocked - * task is again ready to run and has execution priority. - */ - } - } - } -} |