60 lines
3.1 KiB
C
60 lines
3.1 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2013 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#ifndef COMPSWAP_H_INCLUDE
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#define COMPSWAP_H_INCLUDE
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/* COMPSWAP_LOCK/UNLOCK are the same for all platform except for __ia64, which needs slightly different versions to handle
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* memory consistency isues
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*/
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#ifdef UNIX
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boolean_t compswap_secshr(sm_global_latch_ptr_t lock, int compval, int newval1);
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# if (defined(_AIX) || (defined(__ia64) && defined(__linux__))) /* AIX or Linux Itanium */
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boolean_t compswap_lock(sm_global_latch_ptr_t lock, int compval, int newval1);
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boolean_t compswap_unlock(sm_global_latch_ptr_t lock, int compval, int newval1);
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# define COMPSWAP_LOCK(LCK, CMPVAL1, CMPVAL2, NEWVAL1, NEWVAL2) compswap_lock(LCK, CMPVAL1, NEWVAL1)
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# define COMPSWAP_UNLOCK(LCK, CMPVAL1, CMPVAL2, NEWVAL1, NEWVAL2) compswap_unlock(LCK, CMPVAL1, NEWVAL1)
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# elif !defined(__ia64)
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boolean_t compswap(sm_global_latch_ptr_t lock, int compval, int newval1);
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# define COMPSWAP_LOCK(LCK, CMPVAL1, CMPVAL2, NEWVAL1, NEWVAL2) compswap(LCK, CMPVAL1, NEWVAL1)
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# define COMPSWAP_UNLOCK(LCK, CMPVAL1, CMPVAL2, NEWVAL1, NEWVAL2) compswap(LCK, CMPVAL1, NEWVAL1)
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# elif (defined(__HP_cc) || (defined(__hpux) && defined(__GNUC__)))
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/* Use compiler inline assembly macros for HP-UX/HP C or GCC on HPUX*/
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/* This is assuming 32 bit lock storage, which right now seems to be PIDs
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* most of the time. PIDs are currently 32 bit values, but that could change
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* someday, so beware
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*/
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# include <ia64/sys/inline.h>
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# define FENCE (_Asm_fence) (_UP_CALL_FENCE | _UP_SYS_FENCE | _DOWN_CALL_FENCE | _DOWN_SYS_FENCE)
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# define COMPSWAP_LOCK(LCK, CMPVAL1, CMPVAL2, NEWVAL1, NEWVAL2) \
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( \
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_Asm_mov_to_ar((_Asm_app_reg)_AREG_CCV, (uint64_t) CMPVAL1,FENCE), \
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_Asm_cmpxchg((_Asm_sz)_SZ_W, (_Asm_sem)_SEM_ACQ,(uint32_t *)LCK, \
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(uint64_t)NEWVAL1, (_Asm_ldhint)_LDHINT_NONE) == (uint64_t)CMPVAL1 ? 1 : 0 \
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)
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# define COMPSWAP_UNLOCK(LCK, CMPVAL1, CMPVAL2, NEWVAL1, NEWVAL2) \
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( \
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_Asm_mov_to_ar((_Asm_app_reg)_AREG_CCV,(uint64_t) CMPVAL1,FENCE), \
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_Asm_cmpxchg((_Asm_sz)_SZ_W,(_Asm_sem)_SEM_REL,(uint32_t *)LCK, \
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(uint64_t)NEWVAL1, (_Asm_ldhint)_LDHINT_NONE) == (uint64_t)CMPVAL1 ? 1 : 0 \
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)
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# else
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# error Unsupported Platform sr_port/compswap.h
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# endif /* __ia64 */
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#else
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boolean_t compswap(sm_global_latch_ptr_t lock, int compval1, int compval2, int newval1, int newval2);
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boolean_t compswap_secshr(sm_global_latch_ptr_t lock, int compval1, int compval2, int newval1, int newval2);
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# define COMPSWAP_LOCK(LCK, CMPVAL1, CMPVAL2, NEWVAL1, NEWVAL2) compswap(LCK, CMPVAL1, CMPVAL2, NEWVAL1, NEWVAL2)
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# define COMPSWAP_UNLOCK(LCK, CMPVAL1, CMPVAL2, NEWVAL1, NEWVAL2) compswap(LCK, CMPVAL1, CMPVAL2, NEWVAL1, NEWVAL2)
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#endif
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#endif
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