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gfx/skia/trunk/src/ports/SkMutex_pthread.h@129ffea94266 (annotated)

gfx/skia/trunk/src/ports/SkMutex_pthread.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	/*
michael@0	2	* Copyright 2013 Google Inc.
michael@0	3	*
michael@0	4	* Use of this source code is governed by a BSD-style license that can be
michael@0	5	* found in the LICENSE file.
michael@0	6	*/
michael@0	7
michael@0	8	#ifndef SkMutex_pthread_DEFINED
michael@0	9	#define SkMutex_pthread_DEFINED
michael@0	10
michael@0	11	/** Posix pthread_mutex based mutex. */
michael@0	12
michael@0	13	#ifdef SK_DEBUG_PTHREAD_MUTEX
michael@0	14	#include "SkTypes.h"
michael@0	15	#define SkDEBUGCODE_PTHREAD_MUTEX(code) code
michael@0	16	#else
michael@0	17	#define SkDEBUGCODE_PTHREAD_MUTEX(code)
michael@0	18	#ifndef SkDebugf
michael@0	19	void SkDebugf(const char format[], ...);
michael@0	20	#endif
michael@0	21	#endif
michael@0	22
michael@0	23	#include <errno.h>
michael@0	24	#include <pthread.h>
michael@0	25
michael@0	26	// A SkBaseMutex is a POD structure that can be directly initialized
michael@0	27	// at declaration time with SK_DECLARE_STATIC/GLOBAL_MUTEX. This avoids the
michael@0	28	// generation of a static initializer in the final machine code (and
michael@0	29	// a corresponding static finalizer).
michael@0	30	struct SkBaseMutex {
michael@0	31	void acquire() { pthread_mutex_lock(&fMutex); }
michael@0	32	void release() { pthread_mutex_unlock(&fMutex); }
michael@0	33	pthread_mutex_t fMutex;
michael@0	34	};
michael@0	35
michael@0	36	// A normal mutex that requires to be initialized through normal C++ construction,
michael@0	37	// i.e. when it's a member of another class, or allocated on the heap.
michael@0	38	class SkMutex : public SkBaseMutex {
michael@0	39	public:
michael@0	40	SkMutex() {
michael@0	41	SkDEBUGCODE_PTHREAD_MUTEX(int status = )pthread_mutex_init(&fMutex, NULL);
michael@0	42	SkDEBUGCODE_PTHREAD_MUTEX(
michael@0	43	if (status != 0) {
michael@0	44	print_pthread_error(status);
michael@0	45	SkASSERT(0 == status);
michael@0	46	}
michael@0	47	)
michael@0	48	}
michael@0	49
michael@0	50	~SkMutex() {
michael@0	51	SkDEBUGCODE_PTHREAD_MUTEX(int status = )pthread_mutex_destroy(&fMutex);
michael@0	52	SkDEBUGCODE_PTHREAD_MUTEX(
michael@0	53	if (status != 0) {
michael@0	54	print_pthread_error(status);
michael@0	55	SkASSERT(0 == status);
michael@0	56	}
michael@0	57	)
michael@0	58	}
michael@0	59
michael@0	60	private:
michael@0	61	SkMutex(const SkMutex&);
michael@0	62	SkMutex& operator=(const SkMutex&);
michael@0	63
michael@0	64	static void print_pthread_error(int status) {
michael@0	65	switch (status) {
michael@0	66	case 0: // success
michael@0	67	break;
michael@0	68	case EINVAL:
michael@0	69	SkDebugf("pthread error [%d] EINVAL\n", status);
michael@0	70	break;
michael@0	71	case EBUSY:
michael@0	72	SkDebugf("pthread error [%d] EBUSY\n", status);
michael@0	73	break;
michael@0	74	default:
michael@0	75	SkDebugf("pthread error [%d] unknown\n", status);
michael@0	76	break;
michael@0	77	}
michael@0	78	}
michael@0	79	};
michael@0	80
michael@0	81	// Using POD-style initialization prevents the generation of a static initializer.
michael@0	82	#define SK_DECLARE_STATIC_MUTEX(name) static SkBaseMutex name = { PTHREAD_MUTEX_INITIALIZER }
michael@0	83
michael@0	84	// Special case used when the static mutex must be available globally.
michael@0	85	#define SK_DECLARE_GLOBAL_MUTEX(name) SkBaseMutex name = { PTHREAD_MUTEX_INITIALIZER }
michael@0	86
michael@0	87	#endif