Reads an OpenCL buffer into an array and returns the number of read elements.
[in] A handle of the OpenCL buffer.
[in] An array for receiving values from the OpenCL buffer. Passed by reference.
[in] An offset in the OpenCL buffer in bytes, from which reading begins. By default, reading start with the very beginning of the buffer.
[in] The index of the first array element for writing the values of the OpenCL buffer. By default, writing of the read values into an array starts from the zero index.
[in] The number of values that should be read. The whole OpenCL buffer is read by default.
The number of read elements. 0 is returned in case of an error. For information about the error, use the GetLastError() function.
For one-dimensional arrays, the number of the element, into which writing of data into an OpenCL buffer begins, is calculated taking into account the AS_SERIES flags.
An array of two or more dimensions is presented as one-dimensional. In this case, data_offset is the number of elements that should be skipped in the presentation, not the number of elements in the first dimension.