nsprpub/pr/src/cplus/rclock.h
author Michael Wu <mwu@mozilla.com>
Thu, 10 May 2012 12:01:43 -0700
changeset 93716 d37d4edce6dd592f04afa606deb1ae327c07b4a4
parent 15272 4231ddd5f31aacd9345c972aff00b25e15fc6de7
permissions -rw-r--r--
Update NSPR to NSPR_4_9_1_BETA1 tag, a=ted Includes bug 331299, 722125, 693329, 274013, 716564, 736962, 739469, 482002, 693329

/* -*- 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/. */

/*
** C++ access to NSPR locks (PRLock)
*/

#if defined(_RCLOCK_H)
#else
#define _RCLOCK_H

#include "rcbase.h"

#include <prlock.h>

class PR_IMPLEMENT(RCLock): public RCBase
{
public:
    RCLock();
    virtual ~RCLock();

    void Acquire();                 /* non-reentrant */
    void Release();                 /* should be by owning thread */

    friend class RCCondition;

private:
    RCLock(const RCLock&);          /* can't do that */
    void operator=(const RCLock&);  /* nor that */

    PRLock *lock;
};  /* RCLock */

/*
** Class: RCEnter
**
** In scope locks. You can only allocate them on the stack. The language
** will insure that they get released (by calling the destructor) when
** the thread leaves scope, even if via an exception.
*/
class PR_IMPLEMENT(RCEnter)
{
public:
    ~RCEnter();                     /* releases the lock */
    RCEnter(RCLock*);               /* acquires the lock */

private:
    RCLock *lock;

    RCEnter();
    RCEnter(const RCEnter&);
    void operator=(const RCEnter&);

    void *operator new(PRSize) { return NULL; }
    void operator delete(void*) { }
};  /* RCEnter */


inline RCEnter::RCEnter(RCLock* ml) { lock = ml; lock->Acquire(); }
inline RCEnter::~RCEnter() { lock->Release(); lock = NULL; }

#endif /* defined(_RCLOCK_H) */

/* RCLock.h */