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gfx/skia/trunk/src/utils/android/ashmem.cpp@129ffea94266 (annotated)

gfx/skia/trunk/src/utils/android/ashmem.cpp

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 2008 The Android Open Source Project
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	/*
michael@0	9	* Implementation of the user-space ashmem API for devices, which have our
michael@0	10	* ashmem-enabled kernel. See ashmem-sim.c for the "fake" tmp-based version,
michael@0	11	* used by the simulator.
michael@0	12	*/
michael@0	13
michael@0	14	#include <android/ashmem.h>
michael@0	15
michael@0	16	#include <unistd.h>
michael@0	17	#include <string.h>
michael@0	18	#include <sys/types.h>
michael@0	19	#include <sys/stat.h>
michael@0	20	#include <sys/ioctl.h>
michael@0	21	#include <fcntl.h>
michael@0	22
michael@0	23	#include <linux/ashmem.h>
michael@0	24
michael@0	25	#define ASHMEM_DEVICE "/dev/ashmem"
michael@0	26
michael@0	27	/*
michael@0	28	* ashmem_create_region - creates a new ashmem region and returns the file
michael@0	29	* descriptor, or <0 on error
michael@0	30	*
michael@0	31	* `name' is an optional label to give the region (visible in /proc/pid/maps)
michael@0	32	* `size' is the size of the region, in page-aligned bytes
michael@0	33	*/
michael@0	34	int ashmem_create_region(const char *name, size_t size)
michael@0	35	{
michael@0	36	int fd, ret;
michael@0	37
michael@0	38	fd = open(ASHMEM_DEVICE, O_RDWR);
michael@0	39	if (fd < 0)
michael@0	40	return fd;
michael@0	41
michael@0	42	if (name) {
michael@0	43	char buf[ASHMEM_NAME_LEN];
michael@0	44
michael@0	45	strlcpy(buf, name, sizeof(buf));
michael@0	46	ret = ioctl(fd, ASHMEM_SET_NAME, buf);
michael@0	47	if (ret < 0)
michael@0	48	goto error;
michael@0	49	}
michael@0	50
michael@0	51	ret = ioctl(fd, ASHMEM_SET_SIZE, size);
michael@0	52	if (ret < 0)
michael@0	53	goto error;
michael@0	54
michael@0	55	return fd;
michael@0	56
michael@0	57	error:
michael@0	58	close(fd);
michael@0	59	return ret;
michael@0	60	}
michael@0	61
michael@0	62	int ashmem_set_prot_region(int fd, int prot)
michael@0	63	{
michael@0	64	return ioctl(fd, ASHMEM_SET_PROT_MASK, prot);
michael@0	65	}
michael@0	66
michael@0	67	int ashmem_pin_region(int fd, size_t offset, size_t len)
michael@0	68	{
michael@0	69	struct ashmem_pin pin = { offset, len };
michael@0	70	return ioctl(fd, ASHMEM_PIN, &pin);
michael@0	71	}
michael@0	72
michael@0	73	int ashmem_unpin_region(int fd, size_t offset, size_t len)
michael@0	74	{
michael@0	75	struct ashmem_pin pin = { offset, len };
michael@0	76	return ioctl(fd, ASHMEM_UNPIN, &pin);
michael@0	77	}
michael@0	78
michael@0	79	int ashmem_get_size_region(int fd)
michael@0	80	{
michael@0	81	return ioctl(fd, ASHMEM_GET_SIZE, NULL);
michael@0	82	}
michael@0	83
michael@0	84	int ashmem_purge_all_caches(int fd)
michael@0	85	{
michael@0	86	return ioctl(fd, ASHMEM_PURGE_ALL_CACHES, NULL);
michael@0	87	}