141 lines
4.6 KiB
C++
141 lines
4.6 KiB
C++
/*
|
|
* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are
|
|
* met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials provided
|
|
* with the distribution.
|
|
* * Neither the name of Code Aurora Forum, Inc. nor the names of its
|
|
* contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
|
|
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
|
|
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
|
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
|
|
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
|
|
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <sys/mman.h>
|
|
#include <stdlib.h>
|
|
#include <cutils/log.h>
|
|
#include <linux/ashmem.h>
|
|
#include <cutils/ashmem.h>
|
|
#include <errno.h>
|
|
#include "ashmemalloc.h"
|
|
|
|
using gralloc::AshmemAlloc;
|
|
int AshmemAlloc::alloc_buffer(alloc_data& data)
|
|
{
|
|
int err = 0;
|
|
int fd = -1;
|
|
void* base = 0;
|
|
int offset = 0;
|
|
char name[ASHMEM_NAME_LEN];
|
|
snprintf(name, ASHMEM_NAME_LEN, "gralloc-buffer-%x", data.pHandle);
|
|
int prot = PROT_READ | PROT_WRITE;
|
|
fd = ashmem_create_region(name, data.size);
|
|
if (fd < 0) {
|
|
LOGE("couldn't create ashmem (%s)", strerror(errno));
|
|
err = -errno;
|
|
} else {
|
|
if (ashmem_set_prot_region(fd, prot) < 0) {
|
|
LOGE("ashmem_set_prot_region(fd=%d, prot=%x) failed (%s)",
|
|
fd, prot, strerror(errno));
|
|
close(fd);
|
|
err = -errno;
|
|
} else {
|
|
base = mmap(0, data.size, prot, MAP_SHARED|MAP_POPULATE|MAP_LOCKED, fd, 0);
|
|
if (base == MAP_FAILED) {
|
|
LOGE("alloc mmap(fd=%d, size=%d, prot=%x) failed (%s)",
|
|
fd, data.size, prot, strerror(errno));
|
|
close(fd);
|
|
err = -errno;
|
|
} else {
|
|
memset((char*)base + offset, 0, data.size);
|
|
}
|
|
}
|
|
}
|
|
if(err == 0) {
|
|
data.fd = fd;
|
|
data.base = base;
|
|
data.offset = offset;
|
|
clean_buffer(base, data.size, offset, fd);
|
|
}
|
|
return err;
|
|
|
|
}
|
|
|
|
int AshmemAlloc::free_buffer(void* base, size_t size, int offset, int fd)
|
|
{
|
|
LOGD("%s:Freeing buffer size=%d base=%p fd=%d PID=%d",
|
|
__FUNCTION__, size, base, fd, getpid());
|
|
int err = 0;
|
|
|
|
if(!base) {
|
|
LOGE("Invalid free");
|
|
return -EINVAL;
|
|
}
|
|
err = unmap_buffer(base, size, offset);
|
|
close(fd);
|
|
return err;
|
|
}
|
|
|
|
int AshmemAlloc::map_buffer(void **pBase, size_t size, int offset, int fd)
|
|
{
|
|
LOGD("%s: Mapping buffer fd=%d size=%d PID=%d", __FUNCTION__,
|
|
fd, size, getpid());
|
|
int err = 0;
|
|
void *base = 0;
|
|
if (err)
|
|
return err;
|
|
|
|
base = mmap(0, size, PROT_READ| PROT_WRITE,
|
|
MAP_SHARED, fd, 0);
|
|
*pBase = base;
|
|
if(base == MAP_FAILED) {
|
|
LOGD("%s: Failed to map memory in the client: %s",
|
|
__FUNCTION__, strerror(errno));
|
|
err = -errno;
|
|
} else {
|
|
LOGD("%s: Successfully mapped %d bytes", __FUNCTION__, size);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
int AshmemAlloc::unmap_buffer(void *base, size_t size, int offset)
|
|
{
|
|
LOGD("%s: Unmapping buffer at address %p", __FUNCTION__, base);
|
|
int err = munmap(base, size);
|
|
if(err) {
|
|
LOGE("%s: Failed to unmap memory at %p: %s",
|
|
__FUNCTION__, base, strerror(errno));
|
|
}
|
|
return err;
|
|
|
|
}
|
|
int AshmemAlloc::clean_buffer(void *base, size_t size, int offset, int fd)
|
|
{
|
|
// LOGD("%s: Clean buffer fd=%d base = %p size=%d PID=%d", __FUNCTION__,
|
|
// fd, base, size, getpid());
|
|
int err = 0;
|
|
if (ioctl(fd, ASHMEM_CACHE_FLUSH_RANGE, NULL)) {
|
|
LOGE("ASHMEM_CACHE_FLUSH_RANGE failed fd = %d", fd);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|