getc_unlocked()

Arguments:

fp

The stream you want to get the character from.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The getc_unlocked() function is a thread-unsafe version of getc(). You can use it safely only when the invoking thread has locked fp using flockfile() (or ftrylockfile()) and funlockfile().

Returns:

• If successful, getc_unlocked() returns the next character from fp, cast as (int)(unsigned char).
• If the end-of-file indicator for the stream is set or the end of the file has been reached, getc_unlocked() sets the end-of-file indicator and returns EOF.
• If an error occurred, getc_unlocked() sets the error indicator for the stream, sets errno, and returns EOF.

Classification:

POSIX 1003.1