mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
179 lines
4.6 KiB
C
179 lines
4.6 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef prolock_h___
|
|
#define prolock_h___
|
|
|
|
#include "prtypes.h"
|
|
|
|
PR_BEGIN_EXTERN_C
|
|
|
|
/*
|
|
** A locking mechanism, built on the existing PRLock definiion,
|
|
** is provided that will permit applications to define a Lock
|
|
** Hierarchy (or Lock Ordering) schema. An application designed
|
|
** using the Ordered Lock functions will terminate with a
|
|
** diagnostic message when a lock inversion condition is
|
|
** detected.
|
|
**
|
|
** The lock ordering detection is complile-time enabled only. in
|
|
** optimized builds of NSPR, the Ordered Lock functions map
|
|
** directly to PRLock functions, providing no lock order
|
|
** detection.
|
|
**
|
|
** The Ordered Lock Facility is compiled in when DEBUG is defined at
|
|
** compile time. Ordered Lock can be forced on in optimized builds by
|
|
** defining FORCE_NSPR_ORDERED_LOCK at compile time. Both the
|
|
** application using Ordered Lock and NSPR must be compiled with the
|
|
** facility enabled to achieve the desired results.
|
|
**
|
|
** Application designers should use the macro interfaces to the Ordered
|
|
** Lock facility to ensure that it is compiled out in optimized builds.
|
|
**
|
|
** Application designers are responsible for defining their own
|
|
** lock hierarchy.
|
|
**
|
|
** Ordered Lock is thread-safe and SMP safe.
|
|
**
|
|
** See Also: prlock.h
|
|
**
|
|
** /lth. 10-Jun-1998.
|
|
**
|
|
*/
|
|
|
|
/*
|
|
** Opaque type for ordered lock.
|
|
** ... Don't even think of looking in here.
|
|
**
|
|
*/
|
|
|
|
#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
|
|
typedef void * PROrderedLock;
|
|
#else
|
|
/*
|
|
** Map PROrderedLock and methods onto PRLock when ordered locking
|
|
** is not compiled in.
|
|
**
|
|
*/
|
|
#include "prlock.h"
|
|
|
|
typedef PRLock PROrderedLock;
|
|
#endif
|
|
|
|
/* -----------------------------------------------------------------------
|
|
** FUNCTION: PR_CreateOrderedLock() -- Create an Ordered Lock
|
|
**
|
|
** DESCRIPTION: PR_CreateOrderedLock() creates an ordered lock.
|
|
**
|
|
** INPUTS:
|
|
** order: user defined order of this lock.
|
|
** name: name of the lock. For debugging purposes.
|
|
**
|
|
** OUTPUTS: returned
|
|
**
|
|
** RETURNS: PR_OrderedLock pointer
|
|
**
|
|
** RESTRICTIONS:
|
|
**
|
|
*/
|
|
#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
|
|
#define PR_CREATE_ORDERED_LOCK(order,name)\
|
|
PR_CreateOrderedLock((order),(name))
|
|
#else
|
|
#define PR_CREATE_ORDERED_LOCK(order) PR_NewLock()
|
|
#endif
|
|
|
|
NSPR_API(PROrderedLock *)
|
|
PR_CreateOrderedLock(
|
|
PRInt32 order,
|
|
const char *name
|
|
);
|
|
|
|
/* -----------------------------------------------------------------------
|
|
** FUNCTION: PR_DestroyOrderedLock() -- Destroy an Ordered Lock
|
|
**
|
|
** DESCRIPTION: PR_DestroyOrderedLock() destroys the ordered lock
|
|
** referenced by lock.
|
|
**
|
|
** INPUTS: lock: pointer to a PROrderedLock
|
|
**
|
|
** OUTPUTS: the lock is destroyed
|
|
**
|
|
** RETURNS: void
|
|
**
|
|
** RESTRICTIONS:
|
|
**
|
|
*/
|
|
#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
|
|
#define PR_DESTROY_ORDERED_LOCK(lock) PR_DestroyOrderedLock((lock))
|
|
#else
|
|
#define PR_DESTROY_ORDERED_LOCK(lock) PR_DestroyLock((lock))
|
|
#endif
|
|
|
|
NSPR_API(void)
|
|
PR_DestroyOrderedLock(
|
|
PROrderedLock *lock
|
|
);
|
|
|
|
/* -----------------------------------------------------------------------
|
|
** FUNCTION: PR_LockOrderedLock() -- Lock an ordered lock
|
|
**
|
|
** DESCRIPTION: PR_LockOrderedLock() locks the ordered lock
|
|
** referenced by lock. If the order of lock is less than or equal
|
|
** to the order of the highest lock held by the locking thread,
|
|
** the function asserts.
|
|
**
|
|
** INPUTS: lock: a pointer to a PROrderedLock
|
|
**
|
|
** OUTPUTS: The lock is held or the function asserts.
|
|
**
|
|
** RETURNS: void
|
|
**
|
|
** RESTRICTIONS:
|
|
**
|
|
*/
|
|
#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
|
|
#define PR_LOCK_ORDERED_LOCK(lock) PR_LockOrderedLock((lock))
|
|
#else
|
|
#define PR_LOCK_ORDERED_LOCK(lock) PR_Lock((lock))
|
|
#endif
|
|
|
|
NSPR_API(void)
|
|
PR_LockOrderedLock(
|
|
PROrderedLock *lock
|
|
);
|
|
|
|
/* -----------------------------------------------------------------------
|
|
** FUNCTION: PR_UnlockOrderedLock() -- unlock and Ordered Lock
|
|
**
|
|
** DESCRIPTION: PR_UnlockOrderedLock() unlocks the lock referenced
|
|
** by lock.
|
|
**
|
|
** INPUTS: lock: a pointer to a PROrderedLock
|
|
**
|
|
** OUTPUTS: the lock is unlocked
|
|
**
|
|
** RETURNS:
|
|
** PR_SUCCESS
|
|
** PR_FAILURE
|
|
**
|
|
** RESTRICTIONS:
|
|
**
|
|
*/
|
|
#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
|
|
#define PR_UNLOCK_ORDERED_LOCK(lock) PR_UnlockOrderedLock((lock))
|
|
#else
|
|
#define PR_UNLOCK_ORDERED_LOCK(lock) PR_Unlock((lock))
|
|
#endif
|
|
|
|
NSPR_API(PRStatus)
|
|
PR_UnlockOrderedLock(
|
|
PROrderedLock *lock
|
|
);
|
|
|
|
PR_END_EXTERN_C
|
|
|
|
#endif /* prolock_h___ */
|