gecko-dev/nsprpub/pr/include/pratom.h
1998-03-28 02:44:41 +00:00

68 lines
1.8 KiB
C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/* GLOBAL FUNCTIONS:
** DESCRIPTION:
** PR Atomic operations
*/
#ifndef pratom_h___
#define pratom_h___
#include "prtypes.h"
PR_BEGIN_EXTERN_C
/*
** FUNCTION: PR_AtomicIncrement
** DESCRIPTION:
** Atomically increment a 32 bit value.
** INPUTS:
** val: a pointer to the value to increment
** RETURN:
** the returned value has the same sign as the result
*/
PR_EXTERN(PRInt32) PR_AtomicIncrement(PRInt32 *val);
/*
** FUNCTION: PR_AtomicDecrement
** DESCRIPTION:
** Atomically decrement a 32 bit value.
** INPUTS:
** val: a pointer to the value to decrement
** RETURN:
** the returned value has the same sign as the result
*/
PR_EXTERN(PRInt32) PR_AtomicDecrement(PRInt32 *val);
/*
** FUNCTION: PR_AtomicSet
** DESCRIPTION:
** Atomically set a 32 bit value.
** INPUTS:
** val: A pointer to a 32 bit value to bet set
** newval: The newvalue to assign to val
** RETURN:
** Returns the prior value
*/
PR_EXTERN(PRInt32) PR_AtomicSet(PRInt32 *val, PRInt32 newval);
PR_END_EXTERN_C
#endif /* pratom_h___ */