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/*
* Copyright (C) 2016 ARM Limited. All rights reserved.
*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <hardware/hardware.h>
#if GRALLOC_USE_GRALLOC1_API == 1
#include <hardware/gralloc1.h>
#else
#include <hardware/gralloc.h>
#endif
#include "mali_gralloc_module.h"
#include "mali_gralloc_private_interface_types.h"
#include "mali_gralloc_buffer.h"
#include "mali_gralloc_ion.h"
#include "gralloc_buffer_priv.h"
#include "mali_gralloc_bufferallocation.h"
#include "mali_gralloc_debug.h"
static pthread_mutex_t s_map_lock = PTHREAD_MUTEX_INITIALIZER;
int mali_gralloc_reference_retain(mali_gralloc_module const *module, buffer_handle_t handle)
{
GRALLOC_UNUSED(module);
if (private_handle_t::validate(handle) < 0)
{
AERR("Registering/Retaining invalid buffer %p, returning error", handle);
return -EINVAL;
}
private_handle_t *hnd = (private_handle_t *)handle;
pthread_mutex_lock(&s_map_lock);
if (hnd->allocating_pid == getpid() || hnd->remote_pid == getpid())
{
hnd->ref_count++;
pthread_mutex_unlock(&s_map_lock);
return 0;
}
else
{
hnd->remote_pid = getpid();
hnd->ref_count = 1;
}
int retval = -EINVAL;
if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER)
{
retval = 0;
}
else if (hnd->flags & (private_handle_t::PRIV_FLAGS_USES_ION))
{
retval = mali_gralloc_ion_map(hnd);
}
else
{
AERR("unkown buffer flags not supported. flags = %d", hnd->flags);
}
pthread_mutex_unlock(&s_map_lock);
return retval;
}
int mali_gralloc_reference_release(mali_gralloc_module const *module, buffer_handle_t handle, bool canFree)
{
GRALLOC_UNUSED(module);
if (private_handle_t::validate(handle) < 0)
{
AERR("unregistering/releasing invalid buffer %p, returning error", handle);
return -EINVAL;
}
private_handle_t *hnd = (private_handle_t *)handle;
pthread_mutex_lock(&s_map_lock);
if (hnd->ref_count == 0)
{
AERR("Buffer %p should have already been released", handle);
pthread_mutex_unlock(&s_map_lock);
return -EINVAL;
}
if (hnd->allocating_pid == getpid())
{
hnd->ref_count--;
if (hnd->ref_count == 0 && canFree)
{
if (hnd->flags & private_handle_t::PRIV_FLAGS_FRAMEBUFFER)
{
close(hnd->fd);
}
else
{
mali_gralloc_dump_buffer_erase(hnd);
}
mali_gralloc_buffer_free(handle);
delete handle;
}
}
else if (hnd->remote_pid == getpid()) // never unmap buffers that were not imported into this process
{
hnd->ref_count--;
if (hnd->ref_count == 0)
{
if (hnd->flags & (private_handle_t::PRIV_FLAGS_USES_ION))
{
mali_gralloc_ion_unmap(hnd);
}
else
{
AERR("Unregistering/Releasing unknown buffer is not supported. Flags = %d", hnd->flags);
}
/*
* Close shared attribute region file descriptor. It might seem strange to "free"
* this here since this can happen in a client process, but free here is nothing
* but unmapping and closing the duplicated file descriptor. The original ashmem
* fd instance is still open until alloc_device_free() is called. Even sharing
* of gralloc buffers within the same process should have fds dup:ed.
*/
gralloc_buffer_attr_free(hnd);
hnd->base = 0;
hnd->writeOwner = 0;
}
}
else
{
AERR("Trying to unregister buffer %p from process %d that was not imported into current process: %d", hnd,
hnd->remote_pid, getpid());
}
pthread_mutex_unlock(&s_map_lock);
return 0;
}
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