/// <summary>
/// Copy another SyncedMemory into this one.
/// </summary>
/// <param name="src">Specifies the SyncedMemory to copy.</param>
/// <param name="hDstHostBuffer">Optionally, specifies a host buffer used to copy between kernels (default = 0, not used).</param>
/// <returns>When used the dst host buffer handle is returned.</returns>
public long Copy(SyncedMemory <T> src, long hDstHostBuffer = 0)
{
if (src == null)
{
m_lCount = 0;
return(hDstHostBuffer);
}
if (m_lCapacity < src.m_lCount)
{
Allocate(src.m_lCount);
}
m_lCount = src.m_lCount;
if (m_lCount > 0)
{
if (m_cuda.KernelHandle == src.m_cuda.KernelHandle)
{
check_device();
m_cuda.copy((int)m_lCount, src.m_hGpuData, m_hGpuData);
}
else
{
if (hDstHostBuffer == 0)
{
hDstHostBuffer = m_cuda.AllocHostBuffer(m_lCount);
}
else
{
long lCount = m_cuda.GetHostBufferCapacity(hDstHostBuffer);
if (lCount < m_lCount)
{
m_cuda.FreeHostBuffer(hDstHostBuffer);
hDstHostBuffer = m_cuda.AllocHostBuffer(m_lCount);
}
}
src.m_cuda.KernelCopy((int)m_lCount, src.m_hGpuData, 0, m_cuda.KernelHandle, m_hGpuData, 0, hDstHostBuffer, m_cuda.KernelHandle);
}
}
return(hDstHostBuffer);
}