michael@0: /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: /*
michael@0: ** C++ access to NSPR locks (PRLock)
michael@0: */
michael@0: 
michael@0: #if defined(_RCLOCK_H)
michael@0: #else
michael@0: #define _RCLOCK_H
michael@0: 
michael@0: #include "rcbase.h"
michael@0: 
michael@0: #include <prlock.h>
michael@0: 
michael@0: class PR_IMPLEMENT(RCLock): public RCBase
michael@0: {
michael@0: public:
michael@0:     RCLock();
michael@0:     virtual ~RCLock();
michael@0: 
michael@0:     void Acquire();                 /* non-reentrant */
michael@0:     void Release();                 /* should be by owning thread */
michael@0: 
michael@0:     friend class RCCondition;
michael@0: 
michael@0: private:
michael@0:     RCLock(const RCLock&);          /* can't do that */
michael@0:     void operator=(const RCLock&);  /* nor that */
michael@0: 
michael@0:     PRLock *lock;
michael@0: };  /* RCLock */
michael@0: 
michael@0: /*
michael@0: ** Class: RCEnter
michael@0: **
michael@0: ** In scope locks. You can only allocate them on the stack. The language
michael@0: ** will insure that they get released (by calling the destructor) when
michael@0: ** the thread leaves scope, even if via an exception.
michael@0: */
michael@0: class PR_IMPLEMENT(RCEnter)
michael@0: {
michael@0: public:
michael@0:     ~RCEnter();                     /* releases the lock */
michael@0:     RCEnter(RCLock*);               /* acquires the lock */
michael@0: 
michael@0: private:
michael@0:     RCLock *lock;
michael@0: 
michael@0:     RCEnter();
michael@0:     RCEnter(const RCEnter&);
michael@0:     void operator=(const RCEnter&);
michael@0: 
michael@0:     void *operator new(PRSize) { return NULL; }
michael@0:     void operator delete(void*) { }
michael@0: };  /* RCEnter */
michael@0: 
michael@0: 
michael@0: inline RCEnter::RCEnter(RCLock* ml) { lock = ml; lock->Acquire(); }
michael@0: inline RCEnter::~RCEnter() { lock->Release(); lock = NULL; }
michael@0: 
michael@0: #endif /* defined(_RCLOCK_H) */
michael@0: 
michael@0: /* RCLock.h */