prlen will be filled with the number of bytes read if successful.
A short read can only occur if the read reaches the end of the
object.
@param read_op operation to add this action to
@param offset offset to read from
@param len length of buffer
@param buffer where to put the data
@param bytes_read where to store the number of bytes read by this action
@param prval where to store the return value of this action
Read bytes from offset into buffer.
prlen will be filled with the number of bytes read if successful. A short read can only occur if the read reaches the end of the object.
@param read_op operation to add this action to @param offset offset to read from @param len length of buffer @param buffer where to put the data @param bytes_read where to store the number of bytes read by this action @param prval where to store the return value of this action