/*      $NetBSD: rump_curlwp___thread.h,v 1.3 2018/04/19 21:50:10 christos Exp $        */

/*-
* Copyright (c) 2014 Antti Kantee.  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 AUTHOR ``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 AUTHOR 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.
*/

extern __thread struct lwp *curlwp_storage;
#ifdef RUMP__CURLWP_PRIVATE
#include <rump/rumpuser.h>

__thread struct lwp *curlwp_storage;
static void
lwproc_curlwpop(enum rumplwpop op, struct lwp *l)
{

       switch (op) {
       case RUMPUSER_LWP_CREATE:
       case RUMPUSER_LWP_DESTROY:
               break;
       case RUMPUSER_LWP_SET:
               KASSERT(curlwp_storage == NULL);
               curlwp_storage = l;
               break;
       case RUMPUSER_LWP_CLEAR:
               KASSERT(curlwp_storage == l);
               curlwp_storage = NULL;
               break;
       }
       /*
        * Need to keep hypercall layer in sync, since it can use curlwp
        * for things like mutexes.  Should be fixed/adjusted somehow.
        */
       rumpuser_curlwpop(op, l);
}
#endif

static __inline struct lwp * __attribute__((const))
rump_curlwp_fast(void)
{

       return curlwp_storage;
}