+++ /dev/null
-/* $OpenBSD: mutex.c,v 1.20 2017/12/20 11:22:29 mpi Exp $ */
-
-/*
- * Copyright (c) 2004 Artur Grabowski <art@openbsd.org>
- * 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. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED ``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 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 <sys/param.h>
-#include <sys/mutex.h>
-#include <sys/systm.h>
-#include <sys/atomic.h>
-
-#include <machine/intr.h>
-
-#include <ddb/db_output.h>
-
-void
-__mtx_init(struct mutex *mtx, int wantipl)
-{
- mtx->mtx_owner = NULL;
- mtx->mtx_wantipl = wantipl;
- mtx->mtx_oldipl = IPL_NONE;
-}
-
-#ifdef MULTIPROCESSOR
-#ifdef MP_LOCKDEBUG
-#ifndef DDB
-#error "MP_LOCKDEBUG requires DDB"
-#endif
-
-/* CPU-dependent timing, needs this to be settable from ddb. */
-extern int __mp_lock_spinout;
-#endif
-
-void
-__mtx_enter(struct mutex *mtx)
-{
-#ifdef MP_LOCKDEBUG
- int nticks = __mp_lock_spinout;
-#endif
-
- while (__mtx_enter_try(mtx) == 0) {
- CPU_BUSY_CYCLE();
-
-#ifdef MP_LOCKDEBUG
- if (--nticks == 0) {
- db_printf("%s: %p lock spun out", __func__, mtx);
- db_enter();
- nticks = __mp_lock_spinout;
- }
-#endif
- }
-}
-
-int
-__mtx_enter_try(struct mutex *mtx)
-{
- struct cpu_info *owner, *ci = curcpu();
- int s;
-
- if (mtx->mtx_wantipl != IPL_NONE)
- s = splraise(mtx->mtx_wantipl);
-
- owner = atomic_cas_ptr(&mtx->mtx_owner, NULL, ci);
-#ifdef DIAGNOSTIC
- if (__predict_false(owner == ci))
- panic("mtx %p: locking against myself", mtx);
-#endif
- if (owner == NULL) {
- membar_enter_after_atomic();
- if (mtx->mtx_wantipl != IPL_NONE)
- mtx->mtx_oldipl = s;
-#ifdef DIAGNOSTIC
- ci->ci_mutex_level++;
-#endif
- return (1);
- }
-
- if (mtx->mtx_wantipl != IPL_NONE)
- splx(s);
-
- return (0);
-}
-#else
-void
-__mtx_enter(struct mutex *mtx)
-{
- struct cpu_info *ci = curcpu();
-
-#ifdef DIAGNOSTIC
- if (__predict_false(mtx->mtx_owner == ci))
- panic("mtx %p: locking against myself", mtx);
-#endif
-
- if (mtx->mtx_wantipl != IPL_NONE)
- mtx->mtx_oldipl = splraise(mtx->mtx_wantipl);
-
- mtx->mtx_owner = ci;
-
-#ifdef DIAGNOSTIC
- ci->ci_mutex_level++;
-#endif
-}
-
-int
-__mtx_enter_try(struct mutex *mtx)
-{
- __mtx_enter(mtx);
- return (1);
-}
-#endif
-
-void
-__mtx_leave(struct mutex *mtx)
-{
- int s;
-
- MUTEX_ASSERT_LOCKED(mtx);
-
-#ifdef DIAGNOSTIC
- curcpu()->ci_mutex_level--;
-#endif
-
- s = mtx->mtx_oldipl;
-#ifdef MULTIPROCESSOR
- membar_exit_before_atomic();
-#endif
- mtx->mtx_owner = NULL;
- if (mtx->mtx_wantipl != IPL_NONE)
- splx(s);
-}
+++ /dev/null
-/* $OpenBSD: mutex.c,v 1.1 2017/12/20 11:08:44 mpi Exp $ */
-
-/*
- * Copyright (c) 2004 Artur Grabowski <art@openbsd.org>
- * 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. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED ``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 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 <sys/param.h>
-#include <sys/mutex.h>
-#include <sys/systm.h>
-#include <sys/atomic.h>
-
-#include <machine/intr.h>
-
-#include <ddb/db_output.h>
-
-void
-__mtx_init(struct mutex *mtx, int wantipl)
-{
- mtx->mtx_owner = NULL;
- mtx->mtx_wantipl = wantipl;
- mtx->mtx_oldipl = IPL_NONE;
-}
-
-#ifdef MULTIPROCESSOR
-#ifdef MP_LOCKDEBUG
-#ifndef DDB
-#error "MP_LOCKDEBUG requires DDB"
-#endif
-
-/* CPU-dependent timing, needs this to be settable from ddb. */
-extern int __mp_lock_spinout;
-#endif
-
-void
-__mtx_enter(struct mutex *mtx)
-{
-#ifdef MP_LOCKDEBUG
- int nticks = __mp_lock_spinout;
-#endif
-
- while (__mtx_enter_try(mtx) == 0) {
- CPU_BUSY_CYCLE();
-
-#ifdef MP_LOCKDEBUG
- if (--nticks == 0) {
- db_printf("%s: %p lock spun out", __func__, mtx);
- db_enter();
- nticks = __mp_lock_spinout;
- }
-#endif
- }
-}
-
-int
-__mtx_enter_try(struct mutex *mtx)
-{
- struct cpu_info *owner, *ci = curcpu();
- int s;
-
- if (mtx->mtx_wantipl != IPL_NONE)
- s = splraise(mtx->mtx_wantipl);
-
- owner = atomic_cas_ptr(&mtx->mtx_owner, NULL, ci);
-#ifdef DIAGNOSTIC
- if (__predict_false(owner == ci))
- panic("mtx %p: locking against myself", mtx);
-#endif
- if (owner == NULL) {
- membar_enter_after_atomic();
- if (mtx->mtx_wantipl != IPL_NONE)
- mtx->mtx_oldipl = s;
-#ifdef DIAGNOSTIC
- ci->ci_mutex_level++;
-#endif
- return (1);
- }
-
- if (mtx->mtx_wantipl != IPL_NONE)
- splx(s);
-
- return (0);
-}
-#else
-void
-__mtx_enter(struct mutex *mtx)
-{
- struct cpu_info *ci = curcpu();
-
-#ifdef DIAGNOSTIC
- if (__predict_false(mtx->mtx_owner == ci))
- panic("mtx %p: locking against myself", mtx);
-#endif
-
- if (mtx->mtx_wantipl != IPL_NONE)
- mtx->mtx_oldipl = splraise(mtx->mtx_wantipl);
-
- mtx->mtx_owner = ci;
-
-#ifdef DIAGNOSTIC
- ci->ci_mutex_level++;
-#endif
-}
-
-int
-__mtx_enter_try(struct mutex *mtx)
-{
- __mtx_enter(mtx);
- return (1);
-}
-#endif
-
-void
-__mtx_leave(struct mutex *mtx)
-{
- int s;
-
- MUTEX_ASSERT_LOCKED(mtx);
-
-#ifdef DIAGNOSTIC
- curcpu()->ci_mutex_level--;
-#endif
-
- s = mtx->mtx_oldipl;
-#ifdef MULTIPROCESSOR
- membar_exit_before_atomic();
-#endif
- mtx->mtx_owner = NULL;
- if (mtx->mtx_wantipl != IPL_NONE)
- splx(s);
-}
+++ /dev/null
-/* $OpenBSD: arm64_mutex.c,v 1.3 2017/12/20 11:22:29 mpi Exp $ */
-
-/*
- * Copyright (c) 2004 Artur Grabowski <art@openbsd.org>
- * 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. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED ``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 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 <sys/param.h>
-#include <sys/mutex.h>
-#include <sys/systm.h>
-#include <sys/atomic.h>
-
-#include <machine/intr.h>
-
-#include <ddb/db_output.h>
-
-void
-__mtx_init(struct mutex *mtx, int wantipl)
-{
- mtx->mtx_owner = NULL;
- mtx->mtx_wantipl = wantipl;
- mtx->mtx_oldipl = IPL_NONE;
-}
-
-#ifdef MULTIPROCESSOR
-#ifdef MP_LOCKDEBUG
-#ifndef DDB
-#error "MP_LOCKDEBUG requires DDB"
-#endif
-
-/* CPU-dependent timing, needs this to be settable from ddb. */
-extern int __mp_lock_spinout;
-#endif
-
-void
-__mtx_enter(struct mutex *mtx)
-{
-#ifdef MP_LOCKDEBUG
- int nticks = __mp_lock_spinout;
-#endif
-
- while (__mtx_enter_try(mtx) == 0) {
- CPU_BUSY_CYCLE();
-
-#ifdef MP_LOCKDEBUG
- if (--nticks == 0) {
- db_printf("%s: %p lock spun out", __func__, mtx);
- db_enter();
- nticks = __mp_lock_spinout;
- }
-#endif
- }
-}
-
-int
-__mtx_enter_try(struct mutex *mtx)
-{
- struct cpu_info *owner, *ci = curcpu();
- int s;
-
- if (mtx->mtx_wantipl != IPL_NONE)
- s = splraise(mtx->mtx_wantipl);
-
- owner = atomic_cas_ptr(&mtx->mtx_owner, NULL, ci);
-#ifdef DIAGNOSTIC
- if (__predict_false(owner == ci))
- panic("mtx %p: locking against myself", mtx);
-#endif
- if (owner == NULL) {
- membar_enter_after_atomic();
- if (mtx->mtx_wantipl != IPL_NONE)
- mtx->mtx_oldipl = s;
-#ifdef DIAGNOSTIC
- ci->ci_mutex_level++;
-#endif
- return (1);
- }
-
- if (mtx->mtx_wantipl != IPL_NONE)
- splx(s);
-
- return (0);
-}
-#else
-void
-__mtx_enter(struct mutex *mtx)
-{
- struct cpu_info *ci = curcpu();
-
-#ifdef DIAGNOSTIC
- if (__predict_false(mtx->mtx_owner == ci))
- panic("mtx %p: locking against myself", mtx);
-#endif
-
- if (mtx->mtx_wantipl != IPL_NONE)
- mtx->mtx_oldipl = splraise(mtx->mtx_wantipl);
-
- mtx->mtx_owner = ci;
-
-#ifdef DIAGNOSTIC
- ci->ci_mutex_level++;
-#endif
-}
-
-int
-__mtx_enter_try(struct mutex *mtx)
-{
- __mtx_enter(mtx);
- return (1);
-}
-#endif
-
-void
-__mtx_leave(struct mutex *mtx)
-{
- int s;
-
- MUTEX_ASSERT_LOCKED(mtx);
-
-#ifdef DIAGNOSTIC
- curcpu()->ci_mutex_level--;
-#endif
-
- s = mtx->mtx_oldipl;
-#ifdef MULTIPROCESSOR
- membar_exit_before_atomic();
-#endif
- mtx->mtx_owner = NULL;
- if (mtx->mtx_wantipl != IPL_NONE)
- splx(s);
-}
+++ /dev/null
-/* $OpenBSD: mutex.c,v 1.1 2017/12/20 11:08:44 mpi Exp $ */
-
-/*
- * Copyright (c) 2004 Artur Grabowski <art@openbsd.org>
- * 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. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED ``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 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 <sys/param.h>
-#include <sys/mutex.h>
-#include <sys/systm.h>
-#include <sys/atomic.h>
-
-#include <machine/intr.h>
-
-#include <ddb/db_output.h>
-
-void
-__mtx_init(struct mutex *mtx, int wantipl)
-{
- mtx->mtx_owner = NULL;
- mtx->mtx_wantipl = wantipl;
- mtx->mtx_oldipl = IPL_NONE;
-}
-
-#ifdef MULTIPROCESSOR
-#ifdef MP_LOCKDEBUG
-#ifndef DDB
-#error "MP_LOCKDEBUG requires DDB"
-#endif
-
-/* CPU-dependent timing, needs this to be settable from ddb. */
-extern int __mp_lock_spinout;
-#endif
-
-void
-__mtx_enter(struct mutex *mtx)
-{
-#ifdef MP_LOCKDEBUG
- int nticks = __mp_lock_spinout;
-#endif
-
- while (__mtx_enter_try(mtx) == 0) {
- CPU_BUSY_CYCLE();
-
-#ifdef MP_LOCKDEBUG
- if (--nticks == 0) {
- db_printf("%s: %p lock spun out", __func__, mtx);
- db_enter();
- nticks = __mp_lock_spinout;
- }
-#endif
- }
-}
-
-int
-__mtx_enter_try(struct mutex *mtx)
-{
- struct cpu_info *owner, *ci = curcpu();
- int s;
-
- if (mtx->mtx_wantipl != IPL_NONE)
- s = splraise(mtx->mtx_wantipl);
-
- owner = atomic_cas_ptr(&mtx->mtx_owner, NULL, ci);
-#ifdef DIAGNOSTIC
- if (__predict_false(owner == ci))
- panic("mtx %p: locking against myself", mtx);
-#endif
- if (owner == NULL) {
- membar_enter_after_atomic();
- if (mtx->mtx_wantipl != IPL_NONE)
- mtx->mtx_oldipl = s;
-#ifdef DIAGNOSTIC
- ci->ci_mutex_level++;
-#endif
- return (1);
- }
-
- if (mtx->mtx_wantipl != IPL_NONE)
- splx(s);
-
- return (0);
-}
-#else
-void
-__mtx_enter(struct mutex *mtx)
-{
- struct cpu_info *ci = curcpu();
-
-#ifdef DIAGNOSTIC
- if (__predict_false(mtx->mtx_owner == ci))
- panic("mtx %p: locking against myself", mtx);
-#endif
-
- if (mtx->mtx_wantipl != IPL_NONE)
- mtx->mtx_oldipl = splraise(mtx->mtx_wantipl);
-
- mtx->mtx_owner = ci;
-
-#ifdef DIAGNOSTIC
- ci->ci_mutex_level++;
-#endif
-}
-
-int
-__mtx_enter_try(struct mutex *mtx)
-{
- __mtx_enter(mtx);
- return (1);
-}
-#endif
-
-void
-__mtx_leave(struct mutex *mtx)
-{
- int s;
-
- MUTEX_ASSERT_LOCKED(mtx);
-
-#ifdef DIAGNOSTIC
- curcpu()->ci_mutex_level--;
-#endif
-
- s = mtx->mtx_oldipl;
-#ifdef MULTIPROCESSOR
- membar_exit_before_atomic();
-#endif
- mtx->mtx_owner = NULL;
- if (mtx->mtx_wantipl != IPL_NONE)
- splx(s);
-}
+++ /dev/null
-/* $OpenBSD: mutex.c,v 1.8 2017/12/20 11:22:29 mpi Exp $ */
-
-/*
- * Copyright (c) 2004 Artur Grabowski <art@openbsd.org>
- * 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. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED ``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 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 <sys/param.h>
-#include <sys/mutex.h>
-#include <sys/systm.h>
-#include <sys/atomic.h>
-
-#include <machine/intr.h>
-
-#include <ddb/db_output.h>
-
-void
-__mtx_init(struct mutex *mtx, int wantipl)
-{
- mtx->mtx_owner = NULL;
- mtx->mtx_wantipl = wantipl;
- mtx->mtx_oldipl = IPL_NONE;
-}
-
-#ifdef MULTIPROCESSOR
-#ifdef MP_LOCKDEBUG
-#ifndef DDB
-#error "MP_LOCKDEBUG requires DDB"
-#endif
-
-/* CPU-dependent timing, needs this to be settable from ddb. */
-extern int __mp_lock_spinout;
-#endif
-
-void
-__mtx_enter(struct mutex *mtx)
-{
-#ifdef MP_LOCKDEBUG
- int nticks = __mp_lock_spinout;
-#endif
-
- while (__mtx_enter_try(mtx) == 0) {
- CPU_BUSY_CYCLE();
-
-#ifdef MP_LOCKDEBUG
- if (--nticks == 0) {
- db_printf("%s: %p lock spun out", __func__, mtx);
- db_enter();
- nticks = __mp_lock_spinout;
- }
-#endif
- }
-}
-
-int
-__mtx_enter_try(struct mutex *mtx)
-{
- struct cpu_info *owner, *ci = curcpu();
- int s;
-
- if (mtx->mtx_wantipl != IPL_NONE)
- s = splraise(mtx->mtx_wantipl);
-
- owner = atomic_cas_ptr(&mtx->mtx_owner, NULL, ci);
-#ifdef DIAGNOSTIC
- if (__predict_false(owner == ci))
- panic("mtx %p: locking against myself", mtx);
-#endif
- if (owner == NULL) {
- membar_enter_after_atomic();
- if (mtx->mtx_wantipl != IPL_NONE)
- mtx->mtx_oldipl = s;
-#ifdef DIAGNOSTIC
- ci->ci_mutex_level++;
-#endif
- return (1);
- }
-
- if (mtx->mtx_wantipl != IPL_NONE)
- splx(s);
-
- return (0);
-}
-#else
-void
-__mtx_enter(struct mutex *mtx)
-{
- struct cpu_info *ci = curcpu();
-
-#ifdef DIAGNOSTIC
- if (__predict_false(mtx->mtx_owner == ci))
- panic("mtx %p: locking against myself", mtx);
-#endif
-
- if (mtx->mtx_wantipl != IPL_NONE)
- mtx->mtx_oldipl = splraise(mtx->mtx_wantipl);
-
- mtx->mtx_owner = ci;
-
-#ifdef DIAGNOSTIC
- ci->ci_mutex_level++;
-#endif
-}
-
-int
-__mtx_enter_try(struct mutex *mtx)
-{
- __mtx_enter(mtx);
- return (1);
-}
-#endif
-
-void
-__mtx_leave(struct mutex *mtx)
-{
- int s;
-
- MUTEX_ASSERT_LOCKED(mtx);
-
-#ifdef DIAGNOSTIC
- curcpu()->ci_mutex_level--;
-#endif
-
- s = mtx->mtx_oldipl;
-#ifdef MULTIPROCESSOR
- membar_exit_before_atomic();
-#endif
- mtx->mtx_owner = NULL;
- if (mtx->mtx_wantipl != IPL_NONE)
- splx(s);
-}
+++ /dev/null
-/* $OpenBSD: mutex.c,v 1.8 2017/12/20 11:22:29 mpi Exp $ */
-
-/*
- * Copyright (c) 2004 Artur Grabowski <art@openbsd.org>
- * 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. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED ``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 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 <sys/param.h>
-#include <sys/mutex.h>
-#include <sys/systm.h>
-#include <sys/atomic.h>
-
-#include <machine/intr.h>
-
-#include <ddb/db_output.h>
-
-void
-__mtx_init(struct mutex *mtx, int wantipl)
-{
- mtx->mtx_owner = NULL;
- mtx->mtx_wantipl = wantipl;
- mtx->mtx_oldipl = IPL_NONE;
-}
-
-#ifdef MULTIPROCESSOR
-#ifdef MP_LOCKDEBUG
-#ifndef DDB
-#error "MP_LOCKDEBUG requires DDB"
-#endif
-
-/* CPU-dependent timing, needs this to be settable from ddb. */
-extern int __mp_lock_spinout;
-#endif
-
-void
-__mtx_enter(struct mutex *mtx)
-{
-#ifdef MP_LOCKDEBUG
- int nticks = __mp_lock_spinout;
-#endif
-
- while (__mtx_enter_try(mtx) == 0) {
- CPU_BUSY_CYCLE();
-
-#ifdef MP_LOCKDEBUG
- if (--nticks == 0) {
- db_printf("%s: %p lock spun out", __func__, mtx);
- db_enter();
- nticks = __mp_lock_spinout;
- }
-#endif
- }
-}
-
-int
-__mtx_enter_try(struct mutex *mtx)
-{
- struct cpu_info *owner, *ci = curcpu();
- int s;
-
- if (mtx->mtx_wantipl != IPL_NONE)
- s = splraise(mtx->mtx_wantipl);
-
- owner = atomic_cas_ptr(&mtx->mtx_owner, NULL, ci);
-#ifdef DIAGNOSTIC
- if (__predict_false(owner == ci))
- panic("mtx %p: locking against myself", mtx);
-#endif
- if (owner == NULL) {
- membar_enter_after_atomic();
- if (mtx->mtx_wantipl != IPL_NONE)
- mtx->mtx_oldipl = s;
-#ifdef DIAGNOSTIC
- ci->ci_mutex_level++;
-#endif
- return (1);
- }
-
- if (mtx->mtx_wantipl != IPL_NONE)
- splx(s);
-
- return (0);
-}
-#else
-void
-__mtx_enter(struct mutex *mtx)
-{
- struct cpu_info *ci = curcpu();
-
-#ifdef DIAGNOSTIC
- if (__predict_false(mtx->mtx_owner == ci))
- panic("mtx %p: locking against myself", mtx);
-#endif
-
- if (mtx->mtx_wantipl != IPL_NONE)
- mtx->mtx_oldipl = splraise(mtx->mtx_wantipl);
-
- mtx->mtx_owner = ci;
-
-#ifdef DIAGNOSTIC
- ci->ci_mutex_level++;
-#endif
-}
-
-int
-__mtx_enter_try(struct mutex *mtx)
-{
- __mtx_enter(mtx);
- return (1);
-}
-#endif
-
-void
-__mtx_leave(struct mutex *mtx)
-{
- int s;
-
- MUTEX_ASSERT_LOCKED(mtx);
-
-#ifdef DIAGNOSTIC
- curcpu()->ci_mutex_level--;
-#endif
-
- s = mtx->mtx_oldipl;
-#ifdef MULTIPROCESSOR
- membar_exit_before_atomic();
-#endif
- mtx->mtx_owner = NULL;
- if (mtx->mtx_wantipl != IPL_NONE)
- splx(s);
-}
projects / openbsd / commitdiff