putchar_unlocked()
QNX SDP8.0C Library ReferenceAPIDeveloper
Write a character to stdout
Synopsis:
#include <stdio.h>
int putchar_unlocked( int c );
Arguments:
- c
- The character that you want to write.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The putchar_unlocked() function is a thread-unsafe version of putchar(). You can use it safely only when the invoking thread has locked stdout using flockfile() (or ftrylockfile()) and funlockfile().
Returns:
The character written, cast as (int)(unsigned char),
or EOF if an error occurred
(errno is set).
Classification:
| Safety: | |
|---|---|
| Cancellation point | Yes |
| Signal handler | No |
| Thread | No |
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