forked from Archive/PX4-Autopilot
127 lines
4.5 KiB
C
127 lines
4.5 KiB
C
/************************************************************************
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* sched/sig_releasependingsignal.c
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*
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* Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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 <unistd.h>
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#include <signal.h>
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#include <time.h>
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#include <wdog.h>
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#include <assert.h>
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#include <debug.h>
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#include <sched.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/arch.h>
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#include "os_internal.h"
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#include "sig_internal.h"
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/************************************************************************
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* Definitions
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************************************************************************/
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/************************************************************************
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* Private Type Declarations
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************************************************************************/
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/************************************************************************
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* Global Variables
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************************************************************************/
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/************************************************************************
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* Private Variables
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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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* Function: sig_releasependingsignal
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*
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* Description:
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* Deallocate a pending signal list entry
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************************************************************************/
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void sig_releasependingsignal(FAR sigpendq_t *sigpend)
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{
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irqstate_t saved_state;
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/* If this is a generally available pre-allocated structyre,
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* then just put it back in the free list.
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*/
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if (sigpend->type == SIG_ALLOC_FIXED)
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{
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/* Make sure we avoid concurrent access to the free
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* list from interrupt handlers. */
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saved_state = irqsave();
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sq_addlast((FAR sq_entry_t*)sigpend, &g_sigpendingsignal);
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irqrestore(saved_state);
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}
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/* If this is a message pre-allocated for interrupts,
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* then put it back in the correct free list.
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*/
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else if (sigpend->type == SIG_ALLOC_IRQ)
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{
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/* Make sure we avoid concurrent access to the free
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* list from interrupt handlers.
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*/
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saved_state = irqsave();
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sq_addlast((FAR sq_entry_t*)sigpend, &g_sigpendingirqsignal);
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irqrestore(saved_state);
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}
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/* Otherwise, deallocate it. Note: interrupt handlers
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* will never deallocate signals because they will not
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* receive them. */
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else if (sigpend->type == SIG_ALLOC_DYN)
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{
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sched_free(sigpend);
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}
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}
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