55 lines
2.0 KiB
C
55 lines
2.0 KiB
C
/*
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* Copyright (C) 2016, 2018-2021 ARM Limited. All rights reserved.
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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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#pragma once
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#include "core/buffer_descriptor.h"
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/*
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* Creates a new private_handle_t, allocates graphics memory to back it, and maps
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* the graphics memory into the process address space (excluding protected memory).
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*
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* The output must be destroyed by calling allocator_free, followed by
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* native_handle_close, and finally native_handle_delete.
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*
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* @param descriptor [in] Request descriptor
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* @param out_handle [out] Output handle
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*
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* @return 0, on success; -errno, otherwise.
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*/
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int allocator_allocate(const buffer_descriptor_t *descriptor, private_handle_t **out_handle);
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void allocator_free(private_handle_t *handle);
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/*
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* Signal start/end of CPU access to a allocated graphics memory.
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* .R : 实际上是完成 "CPU 访问 buffer 前/后" 的对 cache 必要的 sync 操作.
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*
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* @param handle [in] Buffer handle
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* @param read [in] Flag indicating CPU read access to memory
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* @param write [in] Flag indicating CPU write access to memory
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*
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* @return 0, on success; -errno, otherwise.
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*/
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int allocator_sync_start(const private_handle_t *handle, bool read, bool write);
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int allocator_sync_end(const private_handle_t *handle, bool read, bool write);
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int allocator_map(private_handle_t *handle);
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void allocator_unmap(private_handle_t *handle);
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void allocator_close();
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