The Tor Browser: nsprpub/pr/src/cplus/rclock.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 /*

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

     8 */

    10 #if defined(_RCLOCK_H)

    11 #else

    12 #define _RCLOCK_H

    14 #include "rcbase.h"

    16 #include <prlock.h>

    18 class PR_IMPLEMENT(RCLock): public RCBase

    19 {

    20 public:

    21     RCLock();

    22     virtual ~RCLock();

    24     void Acquire();                 /* non-reentrant */

    25     void Release();                 /* should be by owning thread */

    27     friend class RCCondition;

    29 private:

    30     RCLock(const RCLock&);          /* can't do that */

    31     void operator=(const RCLock&);  /* nor that */

    33     PRLock *lock;

    34 };  /* RCLock */

    36 /*

    37 ** Class: RCEnter

    38 **

    39 ** In scope locks. You can only allocate them on the stack. The language

    40 ** will insure that they get released (by calling the destructor) when

    41 ** the thread leaves scope, even if via an exception.

    42 */

    43 class PR_IMPLEMENT(RCEnter)

    44 {

    45 public:

    46     ~RCEnter();                     /* releases the lock */

    47     RCEnter(RCLock*);               /* acquires the lock */

    49 private:

    50     RCLock *lock;

    52     RCEnter();

    53     RCEnter(const RCEnter&);

    54     void operator=(const RCEnter&);

    56     void *operator new(PRSize) { return NULL; }

    57     void operator delete(void*) { }

    58 };  /* RCEnter */

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

    62 inline RCEnter::~RCEnter() { lock->Release(); lock = NULL; }

    64 #endif /* defined(_RCLOCK_H) */

    66 /* RCLock.h */

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