# List of HDF5 VFL Functions

    The following functions support the HDF5 virtual file layer (VFL), enabling
    the creation of customized I/O drivers.

    At this time, these functions are documented only in the HDF5 Virtual File
    Layer design document and in the source code.

    herr_t H5Pset_driver(hid_t plist_id, hid_t driver_id,
                    const void *driver_info)

    void *H5Pget_driver_info(hid_t plist_id)

    hid_t H5FDregister(const H5FD_class_t *cls);

    herr_t H5FDunregister(hid_t driver_id);

    H5FD_t *H5FDopen(const char *name, unsigned flags, hid_t fapl_id,
    		haddr_t maxaddr);

    herr_t H5FDclose(H5FD_t *file);

    int H5FDcmp(const H5FD_t *f1, const H5FD_t *f2);

    int H5FDquery(const H5FD_t *f, unsigned long *flags);

    haddr_t H5FDalloc(H5FD_t *file, H5FD_mem_t type, hsize_t size);

    herr_t H5FDfree(H5FD_t *file, H5FD_mem_t type, haddr_t addr, hsize_t size);

    haddr_t H5FDrealloc(H5FD_t *file, H5FD_mem_t type, haddr_t addr,
    		hsize_t old_size, hsize_t new_size);

    haddr_t H5FDget_eoa(H5FD_t *file);

    herr_t H5FDset_eoa(H5FD_t *file, haddr_t eof);

    haddr_t H5FDget_eof(H5FD_t *file);

    herr_t H5FDread(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id, haddr_t addr,
    		size_t size, void *buf/*out*/);

    herr_t H5FDwrite(H5FD_t *file, H5FD_mem_t type, hid_t dxpl_id,
    		haddr_t addr, size_t size, const void *buf);

    herr_t H5FDflush(H5FD_t *file, unsigned closing);

    ===========================================
    Last modified:  25 June 2002
    HDF Help Desk:  hdfhelp@ncsa.uiuc.edu