9d3148406c
Squashed commit of the following:
Fix up some final compile isses.
net/netdev: Convert the network down notification logic to use the new wqueue-based notification factility.
net/udp: Convert the UDP readahead notification logic to use the new wqueue-based notification factility.
net/tcp: Convert the TCP readahead notification logic to use the new wqueue-based notification factility.
mm/iob: Convert the IOB notification logic to use the new wqueue-based notification factility.
sched/wqueue: Signals are not good IPCs to support the target poll functionality for several reasons including the amount of data that can be passed with a signal and in the fact that in protected and kernel modes, user threads executing signal handlers in protected, kernel memory is problematic. Instead, convert the same logic to perform the notifications via function callback on the high priority work queue.
264 lines
8.2 KiB
C
264 lines
8.2 KiB
C
/****************************************************************************
|
|
* sched/signal/sig_initialize.c
|
|
*
|
|
* Copyright (C) 2007, 2009, 2011, 2017-2018 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 <stdint.h>
|
|
#include <queue.h>
|
|
#include <nuttx/kmalloc.h>
|
|
|
|
#include "signal/signal.h"
|
|
|
|
/****************************************************************************
|
|
* Public Data
|
|
****************************************************************************/
|
|
|
|
/* The g_sigfreeaction data structure is a list of available signal
|
|
* action structures.
|
|
*/
|
|
|
|
sq_queue_t g_sigfreeaction;
|
|
|
|
/* The g_sigpendingaction data structure is a list of available pending
|
|
* signal action structures.
|
|
*/
|
|
|
|
sq_queue_t g_sigpendingaction;
|
|
|
|
/* The g_sigpendingirqaction is a list of available pending signal actions
|
|
* that are reserved for use by interrupt handlers.
|
|
*/
|
|
|
|
sq_queue_t g_sigpendingirqaction;
|
|
|
|
/* The g_sigpendingsignal data structure is a list of available pending
|
|
* signal structures.
|
|
*/
|
|
|
|
sq_queue_t g_sigpendingsignal;
|
|
|
|
/* The g_sigpendingirqsignal data structure is a list of available
|
|
* pending signal structures that are reserved for use by interrupt
|
|
* handlers.
|
|
*/
|
|
|
|
sq_queue_t g_sigpendingirqsignal;
|
|
|
|
/****************************************************************************
|
|
* Private Data
|
|
****************************************************************************/
|
|
|
|
/* g_sigactionalloc is a pointer to the start of the allocated blocks of
|
|
* signal actions.
|
|
*/
|
|
|
|
static sigactq_t *g_sigactionalloc;
|
|
|
|
/* g_sigpendingactionalloc is a pointer to the start of the allocated
|
|
* blocks of pending signal actions.
|
|
*/
|
|
|
|
static sigq_t *g_sigpendingactionalloc;
|
|
|
|
/* g_sigpendingirqactionalloc is a pointer to the start of the allocated
|
|
* block of pending signal actions.
|
|
*/
|
|
|
|
static sigq_t *g_sigpendingirqactionalloc;
|
|
|
|
/* g_sigpendingsignalalloc is a pointer to the start of the allocated
|
|
* blocks of pending signals.
|
|
*/
|
|
|
|
static sigpendq_t *g_sigpendingsignalalloc;
|
|
|
|
/* g_sigpendingirqsignalalloc is a pointer to the start of the allocated
|
|
* blocks of pending signals.
|
|
*/
|
|
|
|
static sigpendq_t *g_sigpendingirqsignalalloc;
|
|
|
|
/****************************************************************************
|
|
* Private Function Prototypes
|
|
****************************************************************************/
|
|
|
|
static sigq_t *nxsig_alloc_block(sq_queue_t *siglist, uint16_t nsigs,
|
|
uint8_t sigtype);
|
|
static sigpendq_t *nxsig_alloc_pendingsignalblock(sq_queue_t *siglist,
|
|
uint16_t nsigs, uint8_t sigtype);
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: nxsig_alloc_block
|
|
*
|
|
* Description:
|
|
* Allocate a block of pending signal actions and place them
|
|
* on the free list.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static sigq_t *nxsig_alloc_block(sq_queue_t *siglist, uint16_t nsigs,
|
|
uint8_t sigtype)
|
|
{
|
|
FAR sigq_t *sigqalloc;
|
|
FAR sigq_t *sigq;
|
|
int i;
|
|
|
|
/* Allocate a block of pending signal actions */
|
|
|
|
sigqalloc = (FAR sigq_t *)kmm_malloc((sizeof(sigq_t)) * nsigs);
|
|
|
|
sigq = sigqalloc;
|
|
for (i = 0; i < nsigs; i++)
|
|
{
|
|
sigq->type = sigtype;
|
|
sq_addlast((FAR sq_entry_t *)sigq++, siglist);
|
|
}
|
|
|
|
return sigqalloc;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: nxsig_alloc_pendingsignalblock
|
|
*
|
|
* Description:
|
|
* Allocate a block of pending signal structures and place them on
|
|
* the free list.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static sigpendq_t *nxsig_alloc_pendingsignalblock(sq_queue_t *siglist,
|
|
uint16_t nsigs, uint8_t sigtype)
|
|
{
|
|
FAR sigpendq_t *sigpendalloc;
|
|
FAR sigpendq_t *sigpend;
|
|
int i;
|
|
|
|
/* Allocate a block of pending signal structures */
|
|
|
|
sigpendalloc =
|
|
(FAR sigpendq_t *)kmm_malloc((sizeof(sigpendq_t)) * nsigs);
|
|
|
|
sigpend = sigpendalloc;
|
|
for (i = 0; i < nsigs; i++)
|
|
{
|
|
sigpend->type = sigtype;
|
|
sq_addlast((FAR sq_entry_t *)sigpend++, siglist);
|
|
}
|
|
|
|
return sigpendalloc;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: nxsig_initialize
|
|
*
|
|
* Description:
|
|
* Perform one-time power-up initialization
|
|
*
|
|
****************************************************************************/
|
|
|
|
void nxsig_initialize(void)
|
|
{
|
|
/* Initialize free lists */
|
|
|
|
sq_init(&g_sigfreeaction);
|
|
sq_init(&g_sigpendingaction);
|
|
sq_init(&g_sigpendingirqaction);
|
|
sq_init(&g_sigpendingsignal);
|
|
sq_init(&g_sigpendingirqsignal);
|
|
|
|
/* Add a block of signal structures to each list */
|
|
|
|
g_sigpendingactionalloc =
|
|
nxsig_alloc_block(&g_sigpendingaction,
|
|
NUM_PENDING_ACTIONS,
|
|
SIG_ALLOC_FIXED);
|
|
|
|
g_sigpendingirqactionalloc =
|
|
nxsig_alloc_block(&g_sigpendingirqaction,
|
|
NUM_PENDING_INT_ACTIONS,
|
|
SIG_ALLOC_IRQ);
|
|
|
|
nxsig_alloc_actionblock();
|
|
|
|
g_sigpendingsignalalloc =
|
|
nxsig_alloc_pendingsignalblock(&g_sigpendingsignal,
|
|
NUM_SIGNALS_PENDING,
|
|
SIG_ALLOC_FIXED);
|
|
|
|
g_sigpendingirqsignalalloc =
|
|
nxsig_alloc_pendingsignalblock(&g_sigpendingirqsignal,
|
|
NUM_INT_SIGNALS_PENDING,
|
|
SIG_ALLOC_IRQ);
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: nxsig_alloc_actionblock
|
|
*
|
|
* Description:
|
|
* Allocate a block of signal actions and place them
|
|
* on the free list.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void nxsig_alloc_actionblock(void)
|
|
{
|
|
FAR sigactq_t *sigact;
|
|
int i;
|
|
|
|
/* Allocate a block of signal actions */
|
|
|
|
g_sigactionalloc =
|
|
(FAR sigactq_t *)kmm_malloc((sizeof(sigactq_t)) * NUM_SIGNAL_ACTIONS);
|
|
|
|
sigact = g_sigactionalloc;
|
|
for (i = 0; i < NUM_SIGNAL_ACTIONS; i++)
|
|
{
|
|
sq_addlast((FAR sq_entry_t *)sigact++, &g_sigfreeaction);
|
|
}
|
|
}
|