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be43b79fca
Performance analysis revealed that the standard RTEMS objects are a major bottleneck. The object get mechanism and attribute checks at runtime have a significant overhead. Use a custom implementation for synchronization primitives. This drops also the size of the synchronization primitives considerably.
50 lines
1.8 KiB
C
50 lines
1.8 KiB
C
/*-
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* Copyright (c) 2007 Attilio Rao <attilio@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice(s), this list of conditions and the following disclaimer as
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* the first lines of this file unmodified other than the possible
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* addition of one or more copyright notices.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice(s), this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _SYS__SX_H_
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#define _SYS__SX_H_
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#ifdef __rtems__
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#include <machine/rtems-bsd-mutex.h>
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#endif /* __rtems__ */
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/*
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* Shared/exclusive lock main structure definition.
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*/
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struct sx {
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struct lock_object lock_object;
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#ifndef __rtems__
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volatile uintptr_t sx_lock;
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#else /* __rtems__ */
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rtems_bsd_mutex mutex;
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#endif /* __rtems__ */
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};
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#endif /* !_SYS__SX_H_ */
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