cond_attr.c

rtai-3.1-test3的源代码(Real-Time Application Interface )

/*
 * Written by Gilles Chanteperdrix <[e-mail]>.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include "pse51/internal.h"

static pthread_condattr_t default_cond_attr = {
    magic: PSE51_COND_ATTR_MAGIC,
    clock: CLOCK_MONOTONIC
};


int pthread_condattr_init(pthread_condattr_t *attr)
{
    if(!attr)
        return ENOMEM;

    xnmutex_lock(&__imutex);
    if(pse51_obj_busy(attr)) {
        xnmutex_unlock(&__imutex);
        return EBUSY;
    }

    *attr=default_cond_attr;
    xnmutex_unlock(&__imutex);

    return 0;
}

int pthread_condattr_destroy(pthread_condattr_t *attr)
{
    xnmutex_lock(&__imutex);
    if(!pse51_obj_active(attr, PSE51_COND_ATTR_MAGIC, pthread_condattr_t)) {
        xnmutex_unlock(&__imutex);
        return EINVAL;
    }
    
    pse51_mark_deleted(attr);
    xnmutex_unlock(&__imutex);

    return 0;
}

int pthread_condattr_getclock(const pthread_condattr_t *attr, clockid_t *clk_id)
{
    xnmutex_lock(&__imutex);
    if(!pse51_obj_active(attr, PSE51_COND_ATTR_MAGIC, pthread_condattr_t)) {
        xnmutex_unlock(&__imutex);
        return EINVAL;
    }
    *clk_id = attr->clock;
    xnmutex_unlock(&__imutex);

    return 0;
}

int pthread_condattr_setclock(pthread_condattr_t *attr, clockid_t clk_id)
{
    xnmutex_lock(&__imutex);
    if(!pse51_obj_active(attr, PSE51_COND_ATTR_MAGIC, pthread_condattr_t)) {
        xnmutex_unlock(&__imutex);
        return EINVAL;
    }
    switch(clk_id) {
    default:
        xnmutex_unlock(&__imutex);
        return EINVAL;
    case CLOCK_REALTIME:
        /* Not handled yet. */
        xnmutex_unlock(&__imutex);
        return ENOTSUP;        
    case CLOCK_MONOTONIC:
        break;
    }
    attr->clock = clk_id;
    xnmutex_unlock(&__imutex);

    return 0;
}