tnfctl_register_funcs(3TNF) TNF Library Functions tnfctl_register_funcs(3TNF)NAMEtnfctl_register_funcs - register callbacks for probe creation and
destruction
SYNOPSIS
cc [ flag ... ] file ... -ltnfctl [ library ... ]
#include <tnf/tnfctl.h>
tnfctl_errcode_t tnfctl_register_funcs(tnfctl_handle_t *hndl, void *
(*create_func)(tnfctl_handle_t *, tnfctl_probe_t *), void
(*destroy_func)(void *));
DESCRIPTION
The function tnfctl_register_funcs() is used to store client-specific
data on a per-probe basis. It registers a creator and a destructor
function with hndl, either of which can be NULL. The creator function
is called for every probe that currently exists in hndl. Every time a
new probe is discovered, that is brought in by dlopen(3C), create_func
is called.
The return value of the creator function is stored as part of the
probe state and can be retrieved by tnfctl_probe_state_get(3TNF) in the
member field client_registered_data.
destroy_func is called for every probe handle that is freed. This does
not necessarily happen at the time dlclose(3C) frees the shared object.
The probe handles are freed only when hndl is closed by
tnfctl_close(3TNF). If tnfctl_register_funcs() is called a second time
for the same hndl, then the previously registered destructor function
is called first for all of the probes.
RETURN VALUEStnfctl_register_funcs() returns TNFCTL_ERR_NONE upon success.
ERRORS
TNFCTL_ERR_INTERNAL An internal error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
┌─────────────────────────────┬─────────────────────────────┐
│ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
├─────────────────────────────┼─────────────────────────────┤
│Availability │SUNWtnfc │
├─────────────────────────────┼─────────────────────────────┤
│MT Level │MT-Safe │
└─────────────────────────────┴─────────────────────────────┘
SEE ALSOprex(1), TNF_PROBE(3TNF), dlclose(3C), dlopen(3C), libtnfctl(3TNF),
tnfctl_close(3TNF), tnfctl_probe_state_get(3TNF), tracing(3TNF),
tnf_kernel_probes(4), attributes(5)
Linker and Libraries Guide
SunOS 5.10 1 Mar 2004 tnfctl_register_funcs(3TNF)
