diff options
author | pjd <pjd@FreeBSD.org> | 2007-06-08 12:35:47 +0000 |
---|---|---|
committer | pjd <pjd@FreeBSD.org> | 2007-06-08 12:35:47 +0000 |
commit | 9eba2904d11ed785ef1cc694b8615aeb353c2252 (patch) | |
tree | c13033e14290bd6f5979ef75215789df0fb2f0d4 /sys/cddl/compat/opensolaris/kern | |
parent | f25cc1ca4c9929dff27e1d0db4c78685b01657c9 (diff) | |
download | FreeBSD-src-9eba2904d11ed785ef1cc694b8615aeb353c2252.zip FreeBSD-src-9eba2904d11ed785ef1cc694b8615aeb353c2252.tar.gz |
- Reduce number of atomic operations needed to be implemented in asm by
implementing some of them using existing ones.
- Allow to compile ZFS on all archs and use atomic operations surrounded
by global mutex on archs we don't have or can't have all atomic
operations needed by ZFS.
Diffstat (limited to 'sys/cddl/compat/opensolaris/kern')
-rw-r--r-- | sys/cddl/compat/opensolaris/kern/opensolaris_atomic.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/sys/cddl/compat/opensolaris/kern/opensolaris_atomic.c b/sys/cddl/compat/opensolaris/kern/opensolaris_atomic.c new file mode 100644 index 0000000..fb6ef2e --- /dev/null +++ b/sys/cddl/compat/opensolaris/kern/opensolaris_atomic.c @@ -0,0 +1,133 @@ +/*- + * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.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. 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 AUTHORS AND CONTRIBUTORS ``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 AUTHORS 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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/lock.h> +#include <sys/mutex.h> +#include <sys/atomic.h> + +#ifdef _KERNEL +#include <sys/kernel.h> + +struct mtx atomic_mtx; +MTX_SYSINIT(atomic, &atomic_mtx, "atomic", MTX_DEF); +#else +#include <pthread.h> + +#define mtx_lock(lock) pthread_mutex_lock(lock) +#define mtx_unlock(lock) pthread_mutex_unlock(lock) + +static pthread_mutex_t atomic_mtx; + +static __attribute__((constructor)) void +atomic_init(void) +{ + pthread_mutex_init(&atomic_mtx, NULL); +} +#endif + +#ifndef __LP64__ +void +atomic_add_64(volatile uint64_t *target, int64_t delta) +{ + + mtx_lock(&atomic_mtx); + *target += delta; + mtx_unlock(&atomic_mtx); +} +#endif + +uint64_t +atomic_add_64_nv(volatile uint64_t *target, int64_t delta) +{ + uint64_t newval; + + mtx_lock(&atomic_mtx); + newval = (*target += delta); + mtx_unlock(&atomic_mtx); + return (newval); +} + +#if defined(__sparc64__) || defined(__powerpc__) || defined(__arm__) +void +atomic_or_8(volatile uint8_t *target, uint8_t value) +{ + mtx_lock(&atomic_mtx); + *target |= value; + mtx_unlock(&atomic_mtx); +} +#endif + +uint8_t +atomic_or_8_nv(volatile uint8_t *target, uint8_t value) +{ + uint8_t newval; + + mtx_lock(&atomic_mtx); + newval = (*target |= value); + mtx_unlock(&atomic_mtx); + return (newval); +} + +#ifndef __LP64__ +void * +atomic_cas_ptr(volatile void *target, void *cmp, void *newval) +{ + void *oldval, **trg; + + mtx_lock(&atomic_mtx); + trg = __DEVOLATILE(void **, target); + oldval = *trg; + if (oldval == cmp) + *trg = newval; + mtx_unlock(&atomic_mtx); + return (oldval); +} +#endif + +#ifndef __sparc64__ +uint64_t +atomic_cas_64(volatile uint64_t *target, uint64_t cmp, uint64_t newval) +{ + uint64_t oldval; + + mtx_lock(&atomic_mtx); + oldval = *target; + if (oldval == cmp) + *target = newval; + mtx_unlock(&atomic_mtx); + return (oldval); +} +#endif + +void +membar_producer(void) +{ + /* nothing */ +} |