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/*-------------------------------------------------------------------------
*
* spin.h
* synchronization routines
*
*
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: spin.h,v 1.11 2000/01/26 05:58:33 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef SPIN_H
#define SPIN_H
#include "storage/ipc.h"
/*
* two implementations of spin locks
*
* sequent, sparc, sun3: real spin locks. uses a TAS instruction; see
* src/storage/ipc/s_lock.c for details.
*
* default: fake spin locks using semaphores. see spin.c
*
*/
typedef int SPINLOCK;
extern void CreateSpinlocks(IPCKey key);
extern void InitSpinLocks(void);
extern void SpinAcquire(SPINLOCK lockid);
extern void SpinRelease(SPINLOCK lockid);
#endif /* SPIN_H */
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