2 * Copyright (c) 2016, 2017 ARM Limited.
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24 #ifndef __ARM_COMPUTE_ITENSORALLOCATOR_H__
25 #define __ARM_COMPUTE_ITENSORALLOCATOR_H__
27 #include "arm_compute/core/TensorInfo.h"
28 #include "arm_compute/core/Types.h"
34 /** Interface to allocate tensors */
35 class ITensorAllocator
38 /** Default constructor. */
40 /** Allow instances of this class to be copy constructed */
41 ITensorAllocator(const ITensorAllocator &) = default;
42 /** Allow instances of this class to be copied */
43 ITensorAllocator &operator=(const ITensorAllocator &) = default;
44 /** Allow instances of this class to be move constructed */
45 ITensorAllocator(ITensorAllocator &&) = default;
46 /** Allow instances of this class to be moved */
47 ITensorAllocator &operator=(ITensorAllocator &&) = default;
48 /** Default virtual destructor. */
49 virtual ~ITensorAllocator() = default;
51 /** Initialize a tensor based on the passed @ref TensorInfo.
53 * @param[in] input TensorInfo object containing the description of the tensor to initialize.
55 void init(const TensorInfo &input);
56 /** Return a reference to the tensor's metadata
58 * @return Reference to the tensor's metadata.
61 /** Return a constant reference to the tensor's metadata
63 * @return Constant reference to the tensor's metadata.
65 const TensorInfo &info() const;
67 /** Interface to be implemented by the child class to allocate the tensor.
69 * @note The child is expected to use the TensorInfo to get the size of the memory allocation.
70 * @warning The tensor must not already be allocated. Otherwise calling the function will fail.
72 virtual void allocate() = 0;
74 /** Interface to be implemented by the child class to free the allocated tensor.
76 * @warning The tensor must have been allocated previously. Otherwise calling the function will fail.
78 virtual void free() = 0;
81 /** Interface to be implemented by the child class to lock the memory allocation for the CPU to access.
83 * @return Pointer to a CPU mapping of the memory
85 virtual uint8_t *lock() = 0;
86 /** Interface to be implemented by the child class to unlock the memory allocation after the CPU is done accessing it. */
87 virtual void unlock() = 0;
90 TensorInfo _info; /**< Tensor's metadata. */
93 #endif /*__ARM_COMPUTE_ITENSORALLOCATOR_H__ */