putchar.c

来自「基于4个mips核的noc设计」· C语言 代码 · 共 36 行

/*
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#include <stdio.h>
#include "shared_libc.h"

#undef putchar

/*
 * A subroutine version of the macro putchar
 */
int
putchar(int c)
{
	register int r;

        EXCL_START(&stdout->_file_lock);
	r = __sputc(c, stdout);
        EXCL_END(&stdout->_file_lock);
	return r;
}