+/**
+ * \brief Write to a buffer
+ * \param callback Function to call once the write has completed
+ * \param gcb Control Block
+ * \param src_mem Source Data
+ * \param src_len Length of source data
+ * \param dst_buf Destination buffer
+ * \param dst_off Destination offset in the buffer
+ * \param dst_len Length of destination area (What the?, Redundant
+ * Department of redundacny department)
+ * \param path_handle ???
+ */