remove ashmem from skia

src/utils/android/ashmem.cpp

-/*
- * Copyright 2008 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/*
- * Implementation of the user-space ashmem API for devices, which have our
- * ashmem-enabled kernel. See ashmem-sim.c for the "fake" tmp-based version,
- * used by the simulator.
- */
-
-#include <android/ashmem.h>
-
-#include <unistd.h>
-#include <string.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <fcntl.h>
-
-#include <linux/ashmem.h>
-
-#include <SkTypes.h>  // SkASSERT
-
-#define ASHMEM_DEVICE   "/dev/ashmem"
-
-/*
- * ashmem_create_region - creates a new ashmem region and returns the file
- * descriptor, or <0 on error
- *
- * `name' is an optional label to give the region (visible in /proc/pid/maps)
- * `size' is the size of the region, in page-aligned bytes
- */
-int ashmem_create_region(const char *name, size_t size)
-{
-    int fd, ret;
-
-    fd = open(ASHMEM_DEVICE, O_RDWR);
-    if (fd < 0)
-        return fd;
-
-    if (name) {
-        char buf[ASHMEM_NAME_LEN];
-
-        strlcpy(buf, name, sizeof(buf));
-        ret = ioctl(fd, ASHMEM_SET_NAME, buf);
-        if (ret < 0)
-            goto error;
-    }
-
-    ret = ioctl(fd, ASHMEM_SET_SIZE, size);
-    if (ret < 0)
-        goto error;
-
-    return fd;
-
-error:
-    close(fd);
-    return ret;
-}
-
-int ashmem_set_prot_region(int fd, int prot)
-{
-    return ioctl(fd, ASHMEM_SET_PROT_MASK, prot);
-}
-
-int ashmem_pin_region(int fd, size_t offset, size_t len)
-{
-    // Skia only calls this when offset=len=0.
-    struct ashmem_pin pin = { static_cast<__u32>(offset),
-                              static_cast<__u32>(len) };
-    SkASSERT(pin.offset == offset && pin.len == len);
-    return ioctl(fd, ASHMEM_PIN, &pin);
-}
-
-int ashmem_unpin_region(int fd, size_t offset, size_t len)
-{
-    // Skia only calls this when offset=len=0.
-    struct ashmem_pin pin = { static_cast<__u32>(offset),
-                              static_cast<__u32>(len) };
-    SkASSERT(pin.offset == offset && pin.len == len);
-    return ioctl(fd, ASHMEM_UNPIN, &pin);
-}
-
-int ashmem_get_size_region(int fd)
-{
-  return ioctl(fd, ASHMEM_GET_SIZE, NULL);
-}
-
-int ashmem_purge_all_caches(int fd)
-{
-  return ioctl(fd, ASHMEM_PURGE_ALL_CACHES, NULL);
-}