isr_register_node.c
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/*
* Copyright (c) 2017, Cobham Gaisler AB
* All rights reserved.
*
* 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.
*
* 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.
*/
#include <stdlib.h>
#include "bcc/bcc.h"
#include "isr_priv.h"
int bcc_isr_register_node(
struct bcc_isr_node *node
)
{
int source;
void (*handler)(
void *arg,
int source
);
void *arg;
source = node->source;
handler = node->handler;
arg = node->arg;
if (source < 1) { return BCC_FAIL; }
if (ISR_NSOURCES <= source) { return BCC_FAIL; }
if (NULL == handler) { return BCC_FAIL; }
DBG(
"source=%d, handler=%p, arg=%p\n",
source,
(void *) (uintptr_t) handler,
arg
);
struct bcc_isr_node *n;
int plevel;
node->__private = NULL;
/* Link in new node. */
n = (struct bcc_isr_node *) &__bcc_isr_list[source];
plevel = bcc_int_disable();
while (n->__private) {
n = n->__private;
}
n->__private = node;
bcc_int_enable(plevel);
return BCC_OK;
}