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kamailio/atomic/atomic_sparc.h

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3.3 KiB

/*
* Copyright (C) 2006 iptelorg GmbH
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/**
* @file
* @brief Memory barriers for SPARC32 ( version < v 9))
*
* Memory barriers for SPARC32 ( version < v 9)), see atomic_ops.h for more
* details.
*
* Config defines:
* - NOSMP
* @ingroup atomic
*/
/*
* History:
* --------
* 2006-03-28 created by andrei
* 2007-05-29 added membar_depends(), membar_*_atomic_op and
* membar_*_atomic_setget (andrei)
*/
#ifndef _atomic_sparc_h
#define _atomic_sparc_h
#define HAVE_ASM_INLINE_MEMBAR
#warning "sparc32 atomic operations support not tested"
#ifdef NOSMP
#define membar() asm volatile ("" : : : "memory") /* gcc do not cache barrier*/
#define membar_read() membar()
#define membar_write() membar()
#define membar_depends() do {} while(0) /* really empty, not even a cc bar. */
/* lock barrriers: empty, not needed for NOSMP; the lock/unlock should already
* contain gcc barriers*/
#define membar_enter_lock() do {} while(0)
#define membar_leave_lock() do {} while(0)
/* membars after or before atomic_ops or atomic_setget -> use these or
* mb_<atomic_op_name>() if you need a memory barrier in one of these
* situations (on some archs where the atomic operations imply memory
* barriers is better to use atomic_op_x(); membar_atomic_op() then
* atomic_op_x(); membar()) */
#define membar_atomic_op() membar()
#define membar_atomic_setget() membar()
#define membar_write_atomic_op() membar_write()
#define membar_write_atomic_setget() membar_write()
#define membar_read_atomic_op() membar_read()
#define membar_read_atomic_setget() membar_read()
#else /* SMP */
#define membar_write() asm volatile ("stbar \n\t" : : : "memory")
#define membar() membar_write()
#define membar_read() asm volatile ("" : : : "memory")
#define membar_depends() do {} while(0) /* really empty, not even a cc bar. */
#define membar_enter_lock() do {} while(0)
#define membar_leave_lock() asm volatile ("stbar \n\t" : : : "memory")
/* membars after or before atomic_ops or atomic_setget -> use these or
* mb_<atomic_op_name>() if you need a memory barrier in one of these
* situations (on some archs where the atomic operations imply memory
* barriers is better to use atomic_op_x(); membar_atomic_op() then
* atomic_op_x(); membar()) */
#define membar_atomic_op() membar()
#define membar_atomic_setget() membar()
#define membar_write_atomic_op() membar_write()
#define membar_write_atomic_setget() membar_write()
#define membar_read_atomic_op() membar_read()
#define membar_read_atomic_setget() membar_read()
#endif /* NOSMP */
#endif