/* $NetBSD: rumpuser_pth_dummy.c,v 1.18 2017/12/27 09:01:53 ozaki-r Exp $ */
/*
* Copyright (c) 2009 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.
*/
#include "rumpuser_port.h"
#if !defined(lint)
__RCSID("$NetBSD: rumpuser_pth_dummy.c,v 1.18 2017/12/27 09:01:53 ozaki-r Exp $");
#endif /* !lint */
#include <sys/time.h>
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <time.h>
#include <rump/rumpuser.h>
#include "rumpuser_int.h"
static struct lwp *curlwp;
struct rumpuser_cv {};
struct rumpuser_mtx {
int v;
struct lwp *o;
};
struct rumpuser_rw {
int v;
};
void
rumpuser__thrinit(void)
{
return;
}
/*ARGSUSED*/
int
rumpuser_thread_create(void *(*f)(void *), void *arg, const char *thrname,
int joinable, int pri, int cpuidx, void **tptr)
{
fprintf(stderr, "rumpuser: threads not available\n");
abort();
return 0;
}
void
rumpuser_thread_exit(void)
{
fprintf(stderr, "rumpuser: threads not available\n");
abort();
}
int
rumpuser_thread_join(void *p)
{
return 0;
}
void
rumpuser_mutex_init(struct rumpuser_mtx **mtx, int flgas)
{
*mtx = calloc(1, sizeof(struct rumpuser_mtx));
}
int
rumpuser_mutex_spin_p(struct rumpuser_mtx *mtx)
{
return false; /* XXX */
}
void
rumpuser_mutex_enter(struct rumpuser_mtx *mtx)
{
mtx->v++;
mtx->o = curlwp;
}
void
rumpuser_mutex_enter_nowrap(struct rumpuser_mtx *mtx)
{
rumpuser_mutex_enter(mtx);
}
int
rumpuser_mutex_tryenter(struct rumpuser_mtx *mtx)
{
mtx->v++;
return 0;
}
void
rumpuser_mutex_exit(struct rumpuser_mtx *mtx)
{
assert(mtx->v > 0);
if (--mtx->v == 0)
mtx->o = NULL;
}
void
rumpuser_mutex_destroy(struct rumpuser_mtx *mtx)
{
free(mtx);
}
void
rumpuser_mutex_owner(struct rumpuser_mtx *mtx, struct lwp **lp)
{
*lp = mtx->o;
}
void
rumpuser_rw_init(struct rumpuser_rw **rw)
{
*rw = calloc(1, sizeof(struct rumpuser_rw));
}
void
rumpuser_rw_enter(int enum_rumprwlock, struct rumpuser_rw *rw)
{
enum rumprwlock lk = enum_rumprwlock;
switch (lk) {
case RUMPUSER_RW_WRITER:
rw->v++;
assert(rw->v == 1);
break;
case RUMPUSER_RW_READER:
assert(rw->v <= 0);
rw->v--;
break;
}
}
int
rumpuser_rw_tryenter(int enum_rumprwlock, struct rumpuser_rw *rw)
{
rumpuser_rw_enter(enum_rumprwlock, rw);
return 0;
}
void
rumpuser_rw_exit(struct rumpuser_rw *rw)
{
if (rw->v > 0) {
assert(rw->v == 1);
rw->v--;
} else {
rw->v++;
}
}
void
rumpuser_rw_destroy(struct rumpuser_rw *rw)
{
free(rw);
}
void
rumpuser_rw_held(int enum_rumprwlock, struct rumpuser_rw *rw, int *rvp)
{
enum rumprwlock lk = enum_rumprwlock;
switch (lk) {
case RUMPUSER_RW_WRITER:
*rvp = rw->v > 0;
break;
case RUMPUSER_RW_READER:
*rvp = rw->v < 0;
break;
}
}
void
rumpuser_rw_downgrade(struct rumpuser_rw *rw)
{
assert(rw->v == 1);
rw->v = -1;
}
int
rumpuser_rw_tryupgrade(struct rumpuser_rw *rw)
{
if (rw->v == -1) {
rw->v = 1;
return 0;
}
return EBUSY;
}
/*ARGSUSED*/
void
rumpuser_cv_init(struct rumpuser_cv **cv)
{
}
/*ARGSUSED*/
void
rumpuser_cv_destroy(struct rumpuser_cv *cv)
{
}
/*ARGSUSED*/
void
rumpuser_cv_wait(struct rumpuser_cv *cv, struct rumpuser_mtx *mtx)
{
}
/*ARGSUSED*/
void
rumpuser_cv_wait_nowrap(struct rumpuser_cv *cv, struct rumpuser_mtx *mtx)
{
}
/*ARGSUSED*/
int
rumpuser_cv_timedwait(struct rumpuser_cv *cv, struct rumpuser_mtx *mtx,
int64_t sec, int64_t nsec)
{
struct timespec ts;
/*LINTED*/
ts.tv_sec = sec;
/*LINTED*/
ts.tv_nsec = nsec;
nanosleep(&ts, NULL);
return 0;
}
/*ARGSUSED*/
void
rumpuser_cv_signal(struct rumpuser_cv *cv)
{
}
/*ARGSUSED*/
void
rumpuser_cv_broadcast(struct rumpuser_cv *cv)
{
}
/*ARGSUSED*/
void
rumpuser_cv_has_waiters(struct rumpuser_cv *cv, int *rvp)
{
*rvp = 0;
}
/*
* curlwp
*/
void
rumpuser_curlwpop(int enum_rumplwpop, struct lwp *l)
{
enum rumplwpop op = enum_rumplwpop;
switch (op) {
case RUMPUSER_LWP_CREATE:
case RUMPUSER_LWP_DESTROY:
break;
case RUMPUSER_LWP_SET:
curlwp = l;
break;
case RUMPUSER_LWP_CLEAR:
assert(curlwp == l);
curlwp = NULL;
break;
}
}
struct lwp *
rumpuser_curlwp(void)
{
return curlwp;
}