a422f35f04
Implement the hidl .hal interfaces directly instead of using the default shims. This is required since new additions to .hal will no longer be added to the legacy gralloc1 C header. Change-Id: If577a14f75d7d13da0ff656c96ab451d21c910ce
99 lines
3.2 KiB
C++
99 lines
3.2 KiB
C++
/*
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* Copyright (c) 2011-2018, The Linux Foundation. All rights reserved.
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* Not a Contribution
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*
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* Copyright (C) 2008 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __GR_BUF_MGR_H__
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#define __GR_BUF_MGR_H__
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#include <pthread.h>
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#include <mutex>
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#include <unordered_map>
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#include <unordered_set>
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#include <utility>
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#include "gr_allocator.h"
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#include "gr_buf_descriptor.h"
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#include "gralloc_priv.h"
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namespace gralloc {
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using android::hardware::graphics::mapper::V2_0::Error;
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class BufferManager {
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public:
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~BufferManager();
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Error AllocateBuffer(const BufferDescriptor &descriptor, buffer_handle_t *handle,
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unsigned int bufferSize = 0);
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Error RetainBuffer(private_handle_t const *hnd);
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Error ReleaseBuffer(private_handle_t const *hnd);
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Error LockBuffer(const private_handle_t *hnd, uint64_t usage);
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Error UnlockBuffer(const private_handle_t *hnd);
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Error Dump(std::ostringstream *os);
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static BufferManager *GetInstance();
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private:
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BufferManager();
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Error MapBuffer(private_handle_t const *hnd);
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int GetBufferType(int format);
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uint32_t GetDataAlignment(int format, uint64_t usage);
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int GetHandleFlags(int format, uint64_t usage);
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// Imports the ion fds into the current process. Returns an error for invalid handles
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Error ImportHandleLocked(private_handle_t *hnd);
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// Creates a Buffer from the valid private handle and adds it to the map
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void RegisterHandleLocked(const private_handle_t *hnd, int ion_handle, int ion_handle_meta);
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// Wrapper structure over private handle
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// Values associated with the private handle
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// that do not need to go over IPC can be placed here
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// This structure is also not expected to be ABI stable
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// unlike private_handle_t
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struct Buffer {
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const private_handle_t *handle = nullptr;
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int ref_count = 1;
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// Hold the main and metadata ion handles
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// Freed from the allocator process
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// and unused in the mapping process
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int ion_handle_main = -1;
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int ion_handle_meta = -1;
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Buffer() = delete;
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explicit Buffer(const private_handle_t *h, int ih_main = -1, int ih_meta = -1)
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: handle(h), ion_handle_main(ih_main), ion_handle_meta(ih_meta) {}
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void IncRef() { ++ref_count; }
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bool DecRef() { return --ref_count == 0; }
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};
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Error FreeBuffer(std::shared_ptr<Buffer> buf);
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// Get the wrapper Buffer object from the handle, returns nullptr if handle is not found
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std::shared_ptr<Buffer> GetBufferFromHandleLocked(const private_handle_t *hnd);
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bool map_fb_mem_ = false;
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Allocator *allocator_ = NULL;
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std::mutex buffer_lock_;
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std::unordered_map<const private_handle_t *, std::shared_ptr<Buffer>> handles_map_ = {};
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std::atomic<uint64_t> next_id_;
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};
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} // namespace gralloc
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#endif // __GR_BUF_MGR_H__
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