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Add a Win64-specific spin_delay() function.

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We can't use the same as before, since MSVC on Win64 doesn't
support inline assembly.
This commit is contained in:
Magnus Hagander 2010-01-04 17:10:24 +00:00
parent 4c5b4c8bd0
commit 305e85b098
1 changed files with 12 additions and 1 deletions
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13
src/include/storage/s_lock.h
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@ -66,7 +66,7 @@
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California * Portions Copyright (c) 1994, Regents of the University of California
* *
* $PostgreSQL: pgsql/src/include/storage/s_lock.h,v 1.169 2010/01/02 16:58:08 momjian Exp $ * $PostgreSQL: pgsql/src/include/storage/s_lock.h,v 1.170 2010/01/04 17:10:24 mha Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -836,12 +836,23 @@ typedef LONG slock_t;
#define SPIN_DELAY() spin_delay() #define SPIN_DELAY() spin_delay()
/* If using Visual C++ on Win64, inline assembly is unavailable.
* Use a __nop instrinsic instead of rep nop.
*/
#if defined(_WIN64)
static __forceinline void
spin_delay(void)
{
__nop();
}
#else
static __forceinline void static __forceinline void
spin_delay(void) spin_delay(void)
{ {
/* See comment for gcc code. Same code, MASM syntax */ /* See comment for gcc code. Same code, MASM syntax */
__asm rep nop; __asm rep nop;
} }
#endif
#endif #endif