diff options
Diffstat (limited to 'src/H5FDdirect.c')
| -rw-r--r-- | src/H5FDdirect.c | 60 |
1 files changed, 59 insertions, 1 deletions
diff --git a/src/H5FDdirect.c b/src/H5FDdirect.c index a6139da..66843e9 100644 --- a/src/H5FDdirect.c +++ b/src/H5FDdirect.c @@ -140,6 +140,8 @@ static herr_t H5FD__direct_truncate(H5FD_t *_file, hid_t dxpl_id, hbool_t closi static herr_t H5FD__direct_lock(H5FD_t *_file, hbool_t rw); static herr_t H5FD__direct_unlock(H5FD_t *_file); static herr_t H5FD__direct_delete(const char *filename, hid_t fapl_id); +static herr_t H5FD__direct_ctl(H5FD_t *_file, uint64_t op_code, uint64_t flags, const void *input, + void **output); static const H5FD_class_t H5FD_direct_g = { H5FD_DIRECT_VALUE, /* value */ @@ -175,7 +177,7 @@ static const H5FD_class_t H5FD_direct_g = { H5FD__direct_lock, /* lock */ H5FD__direct_unlock, /* unlock */ H5FD__direct_delete, /* del */ - NULL, /* ctl */ + H5FD__direct_ctl, /* ctl */ H5FD_FLMAP_DICHOTOMY /* fl_map */ }; @@ -1421,4 +1423,60 @@ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5FD__direct_delete() */ +/*------------------------------------------------------------------------- + * Function: H5FD__direct_ctl + * + * Purpose: Direct VFD version of the ctl callback. + * + * The desired operation is specified by the op_code + * parameter. + * + * The flags parameter controls management of op_codes that + * are unknown to the callback + * + * The input and output parameters allow op_code specific + * input and output + * + * At present, the only op code supported is + * H5FD_CTL__GET_TERMINAL_VFD, which is used to obtain the + * instance of H5FD_t associated with the terminal + * VFD. This allows comparison of files whose terminal + * VFD may have overlying pass through VFDs. + * + * Return: Non-negative on success/Negative on failure + * + * Changes: None. + * + *------------------------------------------------------------------------- + */ +static herr_t +H5FD__direct_ctl(H5FD_t *_file, uint64_t op_code, uint64_t flags, const void H5_ATTR_UNUSED *input, + void **output) +{ + H5FD_direct_t *file = (H5FD_direct_t *)_file; + herr_t ret_value = SUCCEED; + + FUNC_ENTER_PACKAGE + + /* Sanity checks */ + HDassert(file); + + switch (op_code) { + + case H5FD_CTL__GET_TERMINAL_VFD: + HDassert(output); + *output = (void *)(file); + break; + + /* Unknown op code */ + default: + if (flags & H5FD_CTL__FAIL_IF_UNKNOWN_FLAG) + HGOTO_ERROR(H5E_VFL, H5E_FCNTL, FAIL, "unknown op_code and fail if unknown flag is set") + break; + } + +done: + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5FD__direct_ctl() */ + #endif /* H5_HAVE_DIRECT */ |