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+/*
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef __ARM_COMPUTE_GCTENSORALLOCATOR_H__
+#define __ARM_COMPUTE_GCTENSORALLOCATOR_H__
+
+#include "arm_compute/core/GLES_COMPUTE/OpenGLES.h"
+#include "arm_compute/runtime/ITensorAllocator.h"
+
+#include <memory>
+
+namespace arm_compute
+{
+/** Basic implementation of a GLES memory tensor allocator. */
+class GCTensorAllocator : public ITensorAllocator
+{
+public:
+ /** Default constructor. */
+ GCTensorAllocator();
+
+ /** Prevent instances of this class from being copied (As this class contains pointers). */
+ GCTensorAllocator(const GCTensorAllocator &) = delete;
+
+ /** Prevent instances of this class from being copy assigned (As this class contains pointers). */
+ GCTensorAllocator &operator=(const GCTensorAllocator &) = delete;
+
+ /** Allow instances of this class to be moved */
+ GCTensorAllocator(GCTensorAllocator &&) = default;
+
+ /** Allow instances of this class to be moved */
+ GCTensorAllocator &operator=(GCTensorAllocator &&) = default;
+
+ /** Default destructor */
+ ~GCTensorAllocator() = default;
+
+ /** Interface to be implemented by the child class to return the pointer to the mapped data. */
+ uint8_t *data();
+
+ /** Get the OpenGL ES buffer object name
+ *
+ * @return The buffer object name
+ */
+ GLuint get_gl_ssbo_name() const;
+
+ /** Enqueue a map operation of the allocated buffer on the given queue.
+ *
+ * @param[in] blocking If true, then the mapping will be ready to use by the time
+ * this method returns, else it is the caller's responsibility
+ * to flush the queue and wait for the mapping operation to have completed before using the returned mapping pointer.
+ *
+ * @return The mapping address.
+ */
+ uint8_t *map(bool blocking);
+
+ /** Enqueue an unmap operation of the allocated buffer on the given queue.
+ *
+ * @note This method simply enqueue the unmap operation, it is the caller's responsibility to flush the queue and make sure the unmap is finished before
+ * the memory is accessed by the device.
+ *
+ */
+ void unmap();
+
+ /** Allocate size specified by TensorInfo of GLES memory.
+ *
+ * @note: The tensor must not already be allocated when calling this function.
+ *
+ */
+ void allocate() override;
+
+ /** Free allocated GLES memory.
+ *
+ * @note The tensor must have been allocated when calling this function.
+ *
+ */
+ void free() override;
+
+protected:
+ /** Call map() on the SSBO.
+ *
+ * @return A pointer to the beginning of the tensor's allocation.
+ */
+ uint8_t *lock() override;
+
+ /** Call unmap() on the SSBO. */
+ void unlock() override;
+
+private:
+ class GLBufferWrapper
+ {
+ public:
+ GLBufferWrapper()
+ : _ssbo_name(0)
+ {
+ ARM_COMPUTE_GL_CHECK(glGenBuffers(1, &_ssbo_name));
+ }
+ ~GLBufferWrapper()
+ {
+ ARM_COMPUTE_GL_CHECK(glDeleteBuffers(1, &_ssbo_name));
+ }
+ GLuint _ssbo_name;
+ };
+ std::unique_ptr<GLBufferWrapper> _gl_buffer;
+ uint8_t *_mapping;
+};
+}
+
+#endif /* __ARM_COMPUTE_GCTENSORALLOCATOR_H__ */