The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gfx/skia/trunk/src/utils/android/ashmem.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,87 @@
     1.4 +/*
     1.5 + * Copyright 2008 The Android Open Source Project
     1.6 + *
     1.7 + * Use of this source code is governed by a BSD-style license that can be
     1.8 + * found in the LICENSE file.
     1.9 + */
    1.10 +
    1.11 +/*
    1.12 + * Implementation of the user-space ashmem API for devices, which have our
    1.13 + * ashmem-enabled kernel. See ashmem-sim.c for the "fake" tmp-based version,
    1.14 + * used by the simulator.
    1.15 + */
    1.16 +
    1.17 +#include <android/ashmem.h>
    1.18 +
    1.19 +#include <unistd.h>
    1.20 +#include <string.h>
    1.21 +#include <sys/types.h>
    1.22 +#include <sys/stat.h>
    1.23 +#include <sys/ioctl.h>
    1.24 +#include <fcntl.h>
    1.25 +
    1.26 +#include <linux/ashmem.h>
    1.27 +
    1.28 +#define ASHMEM_DEVICE   "/dev/ashmem"
    1.29 +
    1.30 +/*
    1.31 + * ashmem_create_region - creates a new ashmem region and returns the file
    1.32 + * descriptor, or <0 on error
    1.33 + *
    1.34 + * `name' is an optional label to give the region (visible in /proc/pid/maps)
    1.35 + * `size' is the size of the region, in page-aligned bytes
    1.36 + */
    1.37 +int ashmem_create_region(const char *name, size_t size)
    1.38 +{
    1.39 +    int fd, ret;
    1.40 +
    1.41 +    fd = open(ASHMEM_DEVICE, O_RDWR);
    1.42 +    if (fd < 0)
    1.43 +        return fd;
    1.44 +
    1.45 +    if (name) {
    1.46 +        char buf[ASHMEM_NAME_LEN];
    1.47 +
    1.48 +        strlcpy(buf, name, sizeof(buf));
    1.49 +        ret = ioctl(fd, ASHMEM_SET_NAME, buf);
    1.50 +        if (ret < 0)
    1.51 +            goto error;
    1.52 +    }
    1.53 +
    1.54 +    ret = ioctl(fd, ASHMEM_SET_SIZE, size);
    1.55 +    if (ret < 0)
    1.56 +        goto error;
    1.57 +
    1.58 +    return fd;
    1.59 +
    1.60 +error:
    1.61 +    close(fd);
    1.62 +    return ret;
    1.63 +}
    1.64 +
    1.65 +int ashmem_set_prot_region(int fd, int prot)
    1.66 +{
    1.67 +    return ioctl(fd, ASHMEM_SET_PROT_MASK, prot);
    1.68 +}
    1.69 +
    1.70 +int ashmem_pin_region(int fd, size_t offset, size_t len)
    1.71 +{
    1.72 +    struct ashmem_pin pin = { offset, len };
    1.73 +    return ioctl(fd, ASHMEM_PIN, &pin);
    1.74 +}
    1.75 +
    1.76 +int ashmem_unpin_region(int fd, size_t offset, size_t len)
    1.77 +{
    1.78 +    struct ashmem_pin pin = { offset, len };
    1.79 +    return ioctl(fd, ASHMEM_UNPIN, &pin);
    1.80 +}
    1.81 +
    1.82 +int ashmem_get_size_region(int fd)
    1.83 +{
    1.84 +  return ioctl(fd, ASHMEM_GET_SIZE, NULL);
    1.85 +}
    1.86 +
    1.87 +int ashmem_purge_all_caches(int fd)
    1.88 +{
    1.89 +  return ioctl(fd, ASHMEM_PURGE_ALL_CACHES, NULL);
    1.90 +}