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js/src/vm/Monitor.h@129ffea94266 (annotated)

js/src/vm/Monitor.h

Sat, 03 Jan 2015 20:18:00 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Sat, 03 Jan 2015 20:18:00 +0100

branch

TOR_BUG_3246

changeset 7

129ffea94266

permissions

-rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

michael@0	1	/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
michael@0	2	* vim: set ts=8 sts=4 et sw=4 tw=99:
michael@0	3	* This Source Code Form is subject to the terms of the Mozilla Public
michael@0	4	* License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0	5	* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0	6
michael@0	7	#ifndef vm_Monitor_h
michael@0	8	#define vm_Monitor_h
michael@0	9
michael@0	10	#ifdef JS_THREADSAFE
michael@0	11	#include "mozilla/DebugOnly.h"
michael@0	12	#endif
michael@0	13
michael@0	14	#include <stddef.h>
michael@0	15
michael@0	16	#include "jslock.h"
michael@0	17
michael@0	18	#include "js/Utility.h"
michael@0	19
michael@0	20	namespace js {
michael@0	21
michael@0	22	// A base class used for types intended to be used in a parallel
michael@0	23	// fashion, such as the workers in the |ThreadPool| class. Combines a
michael@0	24	// lock and a condition variable. You can acquire the lock or signal
michael@0	25	// the condition variable using the |AutoLockMonitor| type.
michael@0	26
michael@0	27	class Monitor
michael@0	28	{
michael@0	29	protected:
michael@0	30	friend class AutoLockMonitor;
michael@0	31	friend class AutoUnlockMonitor;
michael@0	32
michael@0	33	PRLock *lock_;
michael@0	34	PRCondVar *condVar_;
michael@0	35
michael@0	36	public:
michael@0	37	Monitor()
michael@0	38	: lock_(nullptr),
michael@0	39	condVar_(nullptr)
michael@0	40	{ }
michael@0	41
michael@0	42	~Monitor() {
michael@0	43	#ifdef JS_THREADSAFE
michael@0	44	if (lock_)
michael@0	45	PR_DestroyLock(lock_);
michael@0	46	if (condVar_)
michael@0	47	PR_DestroyCondVar(condVar_);
michael@0	48	#endif
michael@0	49	}
michael@0	50
michael@0	51	bool init();
michael@0	52	};
michael@0	53
michael@0	54	class AutoLockMonitor
michael@0	55	{
michael@0	56	private:
michael@0	57	#ifdef JS_THREADSAFE
michael@0	58	Monitor &monitor;
michael@0	59	#endif
michael@0	60
michael@0	61	public:
michael@0	62	AutoLockMonitor(Monitor &monitor)
michael@0	63	#ifdef JS_THREADSAFE
michael@0	64	: monitor(monitor)
michael@0	65	{
michael@0	66	PR_Lock(monitor.lock_);
michael@0	67	}
michael@0	68	#else
michael@0	69	{}
michael@0	70	#endif
michael@0	71
michael@0	72	~AutoLockMonitor() {
michael@0	73	#ifdef JS_THREADSAFE
michael@0	74	PR_Unlock(monitor.lock_);
michael@0	75	#endif
michael@0	76	}
michael@0	77
michael@0	78	bool isFor(Monitor &other) const {
michael@0	79	#ifdef JS_THREADSAFE
michael@0	80	return monitor.lock_ == other.lock_;
michael@0	81	#else
michael@0	82	return true;
michael@0	83	#endif
michael@0	84	}
michael@0	85
michael@0	86	void wait(PRCondVar *condVar) {
michael@0	87	#ifdef JS_THREADSAFE
michael@0	88	mozilla::DebugOnly<PRStatus> status =
michael@0	89	PR_WaitCondVar(condVar, PR_INTERVAL_NO_TIMEOUT);
michael@0	90	MOZ_ASSERT(status == PR_SUCCESS);
michael@0	91	#endif
michael@0	92	}
michael@0	93
michael@0	94	void wait() {
michael@0	95	#ifdef JS_THREADSAFE
michael@0	96	wait(monitor.condVar_);
michael@0	97	#endif
michael@0	98	}
michael@0	99
michael@0	100	void notify(PRCondVar *condVar) {
michael@0	101	#ifdef JS_THREADSAFE
michael@0	102	mozilla::DebugOnly<PRStatus> status = PR_NotifyCondVar(condVar);
michael@0	103	MOZ_ASSERT(status == PR_SUCCESS);
michael@0	104	#endif
michael@0	105	}
michael@0	106
michael@0	107	void notify() {
michael@0	108	#ifdef JS_THREADSAFE
michael@0	109	notify(monitor.condVar_);
michael@0	110	#endif
michael@0	111	}
michael@0	112
michael@0	113	void notifyAll(PRCondVar *condVar) {
michael@0	114	#ifdef JS_THREADSAFE
michael@0	115	mozilla::DebugOnly<PRStatus> status = PR_NotifyAllCondVar(monitor.condVar_);
michael@0	116	MOZ_ASSERT(status == PR_SUCCESS);
michael@0	117	#endif
michael@0	118	}
michael@0	119
michael@0	120	void notifyAll() {
michael@0	121	#ifdef JS_THREADSAFE
michael@0	122	notifyAll(monitor.condVar_);
michael@0	123	#endif
michael@0	124	}
michael@0	125	};
michael@0	126
michael@0	127	class AutoUnlockMonitor
michael@0	128	{
michael@0	129	private:
michael@0	130	#ifdef JS_THREADSAFE
michael@0	131	Monitor &monitor;
michael@0	132	#endif
michael@0	133
michael@0	134	public:
michael@0	135	AutoUnlockMonitor(Monitor &monitor)
michael@0	136	#ifdef JS_THREADSAFE
michael@0	137	: monitor(monitor)
michael@0	138	{
michael@0	139	PR_Unlock(monitor.lock_);
michael@0	140	}
michael@0	141	#else
michael@0	142	{}
michael@0	143	#endif
michael@0	144
michael@0	145	~AutoUnlockMonitor() {
michael@0	146	#ifdef JS_THREADSAFE
michael@0	147	PR_Lock(monitor.lock_);
michael@0	148	#endif
michael@0	149	}
michael@0	150
michael@0	151	bool isFor(Monitor &other) const {
michael@0	152	#ifdef JS_THREADSAFE
michael@0	153	return monitor.lock_ == other.lock_;
michael@0	154	#else
michael@0	155	return true;
michael@0	156	#endif
michael@0	157	}
michael@0	158	};
michael@0	159
michael@0	160	} // namespace js
michael@0	161
michael@0	162	#endif /* vm_Monitor_h */