threadproc/os2/thread.c

/* ====================================================================
 * Copyright (c) 1999 The Apache Group.  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.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the Apache Group
 *    for use in the Apache HTTP server project (http://www.apache.org/)."
 *
 * 4. The names "Apache Server" and "Apache Group" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the Apache Group
 *    for use in the Apache HTTP server project (http://www.apache.org/)."
 *
 * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
 * EXPRESSED 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 APACHE GROUP OR
 * ITS 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Group.
 * For more information on the Apache Group and the Apache HTTP server
 * project, please see <http://www.apache.org/>.
 *
 */

#include "threadproc.h"
#include "apr_thread_proc.h"
#include "apr_general.h"
#include "apr_lib.h"
#include "fileio.h"
#define INCL_DOS
#include <os2.h>

ap_status_t ap_create_threadattr(ap_context_t *cont, struct threadattr_t **new)
{
    (*new) = (struct threadattr_t *)ap_palloc(cont, sizeof(struct threadattr_t));

    if ((*new) == NULL) {
        return APR_ENOMEM;
    }

    (*new)->cntxt = cont;
    (*new)->attr = 0;
    return APR_SUCCESS;
}



ap_status_t ap_setthreadattr_detach(struct threadattr_t *attr, ap_int32_t on)
{
    attr->attr |= APR_THREADATTR_DETACHED;
    return APR_SUCCESS;
}



ap_status_t ap_getthreadattr_detach(struct threadattr_t *attr)
{
    return (attr->attr & APR_THREADATTR_DETACHED) ? APR_DETACH : APR_NOTDETACH;
}



static void ap_thread_begin(void *arg)
{
  struct thread_t *thread = (struct thread_t *)arg;
  thread->rv = thread->func(thread->data);
}



ap_status_t ap_create_thread(ap_context_t *cont, struct threadattr_t *attr, 
                             ap_thread_start_t func, void *data, 
                             struct thread_t **new)
{
    ap_status_t stat;
    ap_thread_t *thread;
 
    thread = (struct thread_t *)ap_palloc(cont, sizeof(struct thread_t));
    *new = thread;

    if (thread == NULL) {
        return APR_ENOMEM;
    }

    thread->cntxt = cont;
    thread->attr = attr;
    thread->func = func;
    thread->data = data;
    stat = ap_create_context(cont, NULL, &thread->cntxt);
    
    if (stat != APR_SUCCESS) {
        return stat;
    }

    if (attr == NULL) {
        stat = ap_create_threadattr(thread->cntxt, &thread->attr);
        
        if (stat != APR_SUCCESS) {
            return stat;
        }
    }
    
    if (thread->attr->attr & APR_THREADATTR_DETACHED)
        thread->tid = _beginthread((os2_thread_start_t)func, NULL, APR_THREAD_STACKSIZE, data);
    else
        thread->tid = _beginthread(ap_thread_begin, NULL, APR_THREAD_STACKSIZE, thread);
        
    if (thread->tid < 0) {
        return errno;
    }

    return APR_SUCCESS;
}



ap_status_t ap_thread_exit(ap_thread_t *thd, ap_status_t *retval)
{
    thd->rv = retval;
    _endthread();
    return -1; /* If we get here something's wrong */
}



ap_status_t ap_thread_join(struct thread_t *thd, ap_status_t *retval)
{
    ULONG rc;
    TID waittid = thd->tid;

    if (thd->attr->attr & APR_THREADATTR_DETACHED)
        return APR_ENOSTAT;

    rc = DosWaitThread(&waittid, DCWW_WAIT);
    *retval = (ap_status_t)thd->rv;
    return os2errno(rc);
}



ap_status_t ap_thread_detach(struct thread_t *thd)
{
    thd->attr->attr |= APR_THREADATTR_DETACHED;
    return APR_SUCCESS;
}