Edit

_putch_nolock, _putwch_nolock

  • Article

Writes a character to the console without locking.

Important

This API cannot be used in applications that execute in the Windows Runtime. For more information, see CRT functions not supported in Universal Windows Platform apps.

Syntax

int _putch_nolock(
int c
);
wint_t _putwch_nolock(
wchar_t c
);

Parameters

c
Character to be output.

Return value

Returns c if successful. If _putch_nolock fails, it returns EOF; if _putwch_nolock fails, it returns WEOF.

Remarks

_putch_nolock and _putwch_nolock are identical to _putch and _putwch, respectively, except that they aren't protected from interference by other threads. They might be faster because they don't incur the overhead of locking out other threads. Use these functions only in thread-safe contexts such as single-threaded applications or where the calling scope already handles thread isolation.

By default, this function's global state is scoped to the application. To change this behavior, see Global state in the CRT.

Generic-text routine mappings

Tchar.h routine _UNICODE and _MBCS not defined _MBCS defined _UNICODE defined
_puttch_nolock _putch_nolock _putch_nolock _putwch_nolock

Requirements

Routine Required header
_putch_nolock <conio.h>
_putwch_nolock <conio.h>

For more compatibility information, see Compatibility.

Libraries

All versions of the C run-time libraries.

See also

Console and port I/O
_cprintf, _cprintf_l, _cwprintf, _cwprintf_l
_getch, _getwch