bc69dc2c5a
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5610 42af7a65-404d-4744-a932-0658087f49c3
112 lines
4.5 KiB
C
112 lines
4.5 KiB
C
/****************************************************************************
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* up_schedulesigaction.c
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*
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* Copyright (C) 2007-2010 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sched.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include "os_internal.h"
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#include "up_internal.h"
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/****************************************************************************
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* Private Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_schedule_sigaction
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*
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* Description:
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* This function is called by the OS when one or more
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* signal handling actions have been queued for execution.
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* The architecture specific code must configure things so
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* that the 'igdeliver' callback is executed on the thread
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* specified by 'tcb' as soon as possible.
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*
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* This function may be called from interrupt handling logic.
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*
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* This operation should not cause the task to be unblocked
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* nor should it cause any immediate execution of sigdeliver.
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* Typically, a few cases need to be considered:
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*
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* (1) This function may be called from an interrupt handler
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* During interrupt processing, all xcptcontext structures
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* should be valid for all tasks. That structure should
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* be modified to invoke sigdeliver() either on return
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* from (this) interrupt or on some subsequent context
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* switch to the recipient task.
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* (2) If not in an interrupt handler and the tcb is NOT
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* the currently executing task, then again just modify
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* the saved xcptcontext structure for the recipient
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* task so it will invoke sigdeliver when that task is
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* later resumed.
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* (3) If not in an interrupt handler and the tcb IS the
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* currently executing task -- just call the signal
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* handler now.
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*
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****************************************************************************/
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void up_schedule_sigaction(struct tcb_s *tcb, sig_deliver_t sigdeliver)
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{
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/* We don't have to anything complex for the simulated target */
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if (tcb == (struct tcb_s*)g_readytorun.head)
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{
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sigdeliver(tcb);
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}
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else
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{
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tcb->xcp.sigdeliver = sigdeliver;
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}
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}
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