diff options
| author | Jens-Heiner Rechtien <hr@openoffice.org> | 2001-02-23 18:25:55 +0000 |
|---|---|---|
| committer | Jens-Heiner Rechtien <hr@openoffice.org> | 2001-02-23 18:25:55 +0000 |
| commit | 543e104cf7998419165f873a895c39de3beaafe6 (patch) | |
| tree | 57b4e1682625882485972a2a541a8061a4437163 /sal/osl/unx/interlck.c | |
| parent | 9cdb631676fd315a32faec05278f8cb98b828e88 (diff) | |
implement lockless osl_[increment|decrement]InterlockedCount for GCC on X86
Diffstat (limited to 'sal/osl/unx/interlck.c')
| -rw-r--r-- | sal/osl/unx/interlck.c | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/sal/osl/unx/interlck.c b/sal/osl/unx/interlck.c index 380dada62ba1..4899f2071771 100644 --- a/sal/osl/unx/interlck.c +++ b/sal/osl/unx/interlck.c @@ -2,9 +2,9 @@ * * $RCSfile: interlck.c,v $ * - * $Revision: 1.1.1.1 $ + * $Revision: 1.2 $ * - * last change: $Author: hr $ $Date: 2000-09-18 15:17:21 $ + * last change: $Author: hr $ $Date: 2001-02-23 19:25:55 $ * * The Contents of this file are made available subject to the terms of * either of the following licenses @@ -65,6 +65,44 @@ #include <osl/interlck.h> #include <osl/diagnose.h> +#if (defined ( __SUNPRO_C ) || defined ( __SUNPRO_CC )) && defined ( SPARC ) +#error please use asm/interlck_sparc.s +#elif defined ( GCC ) && defined ( X86 ) + +/*****************************************************************************/ +/* osl_incrementInterlockedCount */ +/*****************************************************************************/ +oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount) +{ + oslInterlockedCount nCount; + + __asm__ __volatile__ ( + "movl $1, %0\n\t" + "lock\n\t" + "xadd %0, %2\n\t" + "incl %0" + : "=a" (nCount), "=m" (*pCount) + : "m" (*pCount) + : "memory"); +} + +oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount) +{ + oslInterlockedCount nCount; + + __asm__ __volatile__ ( + "movl $-1, %0\n\t" + "lock\n\t" + "xadd %0, %2\n\t" + "decl %0" + : "=a" (nCount), "=m" (*pCount) + : "m" (*pCount) + : "memory"); +} + +#elif +/* use only if nothinig else works, expensive due to single mutex for all reference counts */ + static pthread_mutex_t InterLock = PTHREAD_MUTEX_INITIALIZER; /*****************************************************************************/ @@ -95,3 +133,4 @@ oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* return (Count); } +#endif /* expensive default, works everywhere */ |