b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross/*
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * This file and its contents are supplied under the terms of the
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * Common Development and Distribution License ("CDDL"), version 1.0.
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * You may only use this file in accordance with the terms of version
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * 1.0 of the CDDL.
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross *
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * A full copy of the text of the CDDL should have accompanied this
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * source. A copy of the CDDL is also available via the Internet at
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * http://www.illumos.org/license/CDDL.
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross/*
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * Copyright 2013 Nexenta Systems, Inc. All rights reserved.
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross/*
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * mutex(9f)
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross/* This is the API we're emulating */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross#include <sys/mutex.h>
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross#include <sys/errno.h>
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross#include <sys/debug.h>
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross#include <sys/thread.h>
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossint _lwp_mutex_lock(lwp_mutex_t *);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossint _lwp_mutex_unlock(lwp_mutex_t *);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossint _lwp_mutex_trylock(lwp_mutex_t *);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossextern clock_t ddi_get_lbolt(void);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossextern void clock2ts(clock_t, timespec_t *);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossstatic const lwp_mutex_t default_mutex =
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross {{0, 0, 0, {USYNC_THREAD}, _MUTEX_MAGIC},
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross {{{0, 0, 0, 0, 0, 0, 0, 0}}}, 0};
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross/* ARGSUSED */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossvoid
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rosskmutex_init(kmutex_t *mp, char *name, kmutex_type_t typ, void *arg)
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross{
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross mp->m_lock = default_mutex;
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross mp->m_owner = _KTHREAD_INVALID;
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross}
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross/* ARGSUSED */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossvoid
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rosskmutex_destroy(kmutex_t *mp)
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross{
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross mp->m_owner = _KTHREAD_INVALID;
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross}
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossvoid
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossmutex_enter(kmutex_t *mp)
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross{
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross VERIFY(0 == _lwp_mutex_lock(&mp->m_lock));
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross mp->m_owner = _curthread();
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross}
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossint
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossmutex_tryenter(kmutex_t *mp)
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross{
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross int rc;
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross rc = _lwp_mutex_trylock(&mp->m_lock);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross if (rc == 0) {
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross mp->m_owner = _curthread();
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross return (1);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross }
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross return (0);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross}
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossvoid
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossmutex_exit(kmutex_t *mp)
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross{
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross ASSERT(mp->m_owner == _curthread());
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross mp->m_owner = _KTHREAD_INVALID;
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross (void) _lwp_mutex_unlock(&mp->m_lock);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross}
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross/*
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross * Returns the kthread_t * of the owner.
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross */
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossvoid *
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossmutex_owner(const kmutex_t *mp)
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross{
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross return (mp->m_owner);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross}
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossint
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Rossmutex_owned(const kmutex_t *mp)
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross{
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross void *t = _curthread();
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross return (t == mp->m_owner);
b819cea2f73f98c5662230cc9affc8cc84f77fcfGordon Ross}