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The _nolock functions are versions of I/O functions that don't perform any locking. They're provided for users requiring maximum performance. For more information, see Multithreaded libraries performance.
Use _nolock functions only if your program is truly single-threaded or if it does its own locking.
No lock routines
| Routine | Use |
|---|---|
_fclose_nolock |
Closes a stream without locking |
_fflush_nolock |
Flushes a stream without locking |
_fgetc_nolock, _fgetwc_nolock |
Reads a character from a stream without locking |
_fread_nolock |
Reads data from a stream without locking |
_fseek_nolock, _fseeki64_nolock |
Moves the file pointer to a specified location without locking |
_ftell_nolock, _ftelli64_nolock |
Gets the current position of a file pointer without locking |
_fwrite_nolock |
Writes data to a stream without locking |
_getc_nolock, _getwc_nolock |
Reads a character from a stream without locking |
_getch_nolock, _getwch_nolock |
Gets a character from the console without echo and without locking |
_getchar_nolock, _getwchar_nolock |
Reads a character from the standard input without locking |
_getche_nolock, _getwche_nolock |
Gets a character from the console with echo and without locking |
_getdcwd_nolock, _wgetdcwd_nolock |
Gets the full path of the current working directory on the specified drive |
_putc_nolock, _putwc_nolock |
Writes a character to a stream without locking |
_putch_nolock, _putwch_nolock |
Writes a character to the console without locking |
_putchar_nolock, _putwchar_nolock |
Writes a character to stdout without locking |
_ungetc_nolock, _ungetwc_nolock |
Pushes a character back onto the stream without locking |
_ungetch_nolock, _ungetwch_nolock |
Pushes back the last character that's read from the console without locking |