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/*
* Copyright 2011-2017 Blender Foundation
*
* 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.
*/
#pragma once
#include "device/device.h"
#include "util/util_map.h"
#include "util/util_string.h"
#include "util/util_vector.h"
#include "clew.h"
CCL_NAMESPACE_BEGIN
class OpenCLDevice;
class MemoryManager {
public:
static const int NUM_DEVICE_BUFFERS = 8;
struct BufferDescriptor {
uint device_buffer;
cl_ulong offset;
};
private:
struct DeviceBuffer;
struct Allocation {
device_memory *mem;
DeviceBuffer *device_buffer;
size_t size; /* Size of actual allocation, may be larger than requested. */
BufferDescriptor desc;
bool needs_copy_to_device;
Allocation() : mem(NULL), device_buffer(NULL), size(0), needs_copy_to_device(false)
{
}
};
struct DeviceBuffer {
device_only_memory<uchar> *buffer;
vector<Allocation *> allocations;
size_t size; /* Size of all allocations. */
DeviceBuffer() : buffer(NULL), size(0)
{
}
~DeviceBuffer()
{
delete buffer;
buffer = NULL;
}
void add_allocation(Allocation &allocation);
void update_device_memory(OpenCLDevice *device);
void free(OpenCLDevice *device);
};
OpenCLDevice *device;
DeviceBuffer device_buffers[NUM_DEVICE_BUFFERS];
typedef unordered_map<string, Allocation> AllocationsMap;
AllocationsMap allocations;
bool need_update;
DeviceBuffer *smallest_device_buffer();
public:
MemoryManager(OpenCLDevice *device);
void free(); /* Free all memory. */
void alloc(const char *name, device_memory &mem);
bool free(device_memory &mem);
BufferDescriptor get_descriptor(string name);
void update_device_memory();
void set_kernel_arg_buffers(cl_kernel kernel, cl_uint *narg);
};
CCL_NAMESPACE_END
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