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/*
* Copyright (C) 2014 Mark Hills <mark@xwax.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*
*/
#include <errno.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include "thread.h"
static pthread_key_t key;
/*
* Put in place checks for realtime and non-realtime threads
*
* Return: 0 on success, otherwise -1
*/
int thread_global_init(void)
{
int r;
r = pthread_key_create(&key, NULL);
if (r != 0) {
errno = r;
perror("pthread_key_create");
return -1;
}
if (pthread_setspecific(key, (void*)false) != 0)
abort();
return 0;
}
void thread_global_clear(void)
{
if (pthread_key_delete(key) != 0)
abort();
}
/*
* Inform that this thread is a realtime thread, for assertions later
*/
void thread_to_realtime(void)
{
if (pthread_setspecific(key, (void*)true) != 0)
abort();
}
/*
* Check for programmer error
*
* Pre: the current thread is non realtime
*/
void rt_not_allowed()
{
bool rt;
rt = (bool)pthread_getspecific(key);
if (rt) {
fprintf(stderr, "Realtime thread called a blocking function\n");
abort();
}
}
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