public CArray(int n, EType type, EMemorySpace side, CModel model, string name)
{
alloc(n, type, side, model);
_model = model;
_suballocated = false;
_number_of_internal_buffers = 0;
_internal_buffer_pointers = null;
_name = name;
}
public CArray(CArray buf, uint offset_in_bytes, int sz, CModel model, string name)
{
if (buf == null) throw new System.Exception();
if (sz > buf._sz - offset_in_bytes) throw new System.Exception();
this._ptr = buf._ptr + offset_in_bytes;
this._length = 0;
this._sz = sz;
this._side = buf._side;
_model = model;
_suballocated = false;
_number_of_internal_buffers = 0;
_internal_buffer_pointers = null;
_name = name;
}
public VanillaPayoffEvaluator(CModel model, double s)
{
numBatches = model.mcplan._nbatches;
numScenPerBatch = model.mcplan._nscen_per_batch;
lastStep = model.mcplan.nk - 1;
gridMap = model.grid.host_d_xval_y;
strike = s;
results = new double[numBatches * numScenPerBatch];
}
private void alloc(int n, EType type, EMemorySpace side, CModel model)
{
if (n == 0) return;
if (_model == null)
{
_model = model;
}
else
{
if (_model != model) throw new System.Exception();
}
this._type = type;
this._side = side;
if (_sz == 0)
{
if (side == EMemorySpace.device)
{
if (_suballocated) throw new System.Exception();
_ptr = opcuda_mem_alloc((uint)(Size_of_one * n));
}
else
{
if (_suballocated) throw new System.Exception();
_hptr = opcuda_mem_alloc_host((uint)(Size_of_one * n));
}
int status = opcuda_get_status();
if (status != 0) throw new System.Exception();
_length = n;
_sz = Size_of_one * n;
return;
}
if (_sz < Size_of_one * n)
{
if (side == EMemorySpace.device)
{
if (_suballocated) throw new System.Exception();
opcuda_mem_free_device(ptr);
_ptr = opcuda_mem_alloc((uint)(Size_of_one * n));
}
else
{
if (_suballocated) throw new System.Exception();
opcuda_mem_free_host(hptr);
_hptr = opcuda_mem_alloc_host((uint)(Size_of_one * n));
}
int status = opcuda_get_status();
if (status != 0) throw new System.Exception();
_sz = Size_of_one * n;
_length = n;
return;
}
_length = n;
}
private CArray(CModel model)
{
_model = model;
_suballocated = false;
_number_of_internal_buffers = 0;
_internal_buffer_pointers = null;
}
public static void alloc(ref CArray buf, int n, EType type, EMemorySpace side, CModel model, string name)
{
if (buf == null)
{
buf = new CArray(n, type, side, model, name);
return;
}
if (buf._suballocated) throw new System.Exception();
if (buf.sz < n * sizeof_type(type))
{
if (model != buf._model) throw new System.Exception();
buf = new CArray(n, type, side, model, name);
return;
}
if (model != buf._model) throw new System.Exception();
}