putc_unlocked() -- write character to stream (not thread-safe)

SYNOPSIS

#include <stdio.h>

int putc_unlocked(int c, FILE *stream);

The putc_unlocked() function is equivalent to putc(), except that putc_unlocked() is not thread-safe. It writes a byte with value c, cast as an unsigned character, to stream. After putc_unlocked() returns, the character may be held in an internal buffer either until fflush() or fclose() are executed on stream, or until the process executes exit() or abort().

This function may safely be used in a multi-threaded process only if the invoking thread owns stream, within a scope protected by flockfile() (or ftrylockfile()) and funlockfile().

PARAMETERS

c: Is the character to be written.
stream: Points to the output stream.

RETURN VALUES

On success, putc_unlocked() returns the value c that it wrote to stream. On failure, it returns EOF and sets errno to one of the following values:

EACCES: Another process has the file locked.
EBADF: stream is not a valid stream opened for writing.
EINTR: A signal interrupted the call.
EIO: An output error occurred.
ENOMEM: Memory could not be allocated for internal buffers.
ENOSPC: An attempt was made to write to a full disk.
ENXIO: A device error occurred.
EPIPE: An attempt was made to write to a closed pipe.

putc_unlocked()
write character to stream (not thread-safe)

Function

SYNOPSIS

DESCRIPTION

PARAMETERS

RETURN VALUES

CONFORMANCE

MULTITHREAD SAFETY LEVEL

PORTING ISSUES

AVAILABILITY

SEE ALSO

putc_unlocked() write character to stream (not thread-safe)

Function

putc_unlocked()
write character to stream (not thread-safe)