funlockfile(3S)

funlockfile -- relinquish thread ownership of a file

Synopsis

#include <stdio.h>

void funlockfile(FILE

file);

Description

This function provide for explicit application-level locking of standard I/O objects. It can be used by a thread to end a sequence of I/O statements that are to be executed as a unit.

funlockfile relinquishes ownership granted to the thread via a previous successful call to flockfile or ftrylockfile.

A thread can nest calls to flockfile or ftrylockfile as long as each successful call has a corresponding funlockfile call to relinquish ownership completely.

The behavior is undefined if funlockfile is called without a matching successful call to flockfile or ftrylockfile.

References

flock(3S), flockfile(3S), ftrylockfile(3S), Intro(3S)