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os0sync.ic：源码内容

							/******************************************************
The interface to the operating system synchronization primitives.
(c) 1995 Innobase Oy
Created 9/6/1995 Heikki Tuuri
*******************************************************/
#ifdef __WIN__
#include <winbase.h>
#endif
#ifndef _WIN32
/**************************************************************
Acquires ownership of a fast mutex. */
UNIV_INLINE
ulint
os_fast_mutex_trylock(
/*==================*/
						/* out: 0 if success, != 0 if
						was reserved by another
						thread */
	os_fast_mutex_t*	fast_mutex)	/* in: mutex to acquire */
{
#ifdef __WIN__	
	int	ret;
	/* TODO: TryEnterCriticalSection is probably not found from
	NT versions < 4! */
	ret = TryEnterCriticalSection(fast_mutex);
	if (ret) {
		return(0);
	}
	return(1);
#else
	return((ulint) pthread_mutex_trylock(fast_mutex));
#endif
}
/**************************************************************
Releases ownership of a fast mutex. */
UNIV_INLINE
void
os_fast_mutex_unlock(
/*=================*/
	os_fast_mutex_t*	fast_mutex)	/* in: mutex to release */
{
#ifdef __WIN__
	LeaveCriticalSection(fast_mutex);
#else
	pthread_mutex_unlock(fast_mutex);
#endif
}
#endif

						