/* * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ #include <i386/mp.h> #include <i386/machine_routines.h> void cnputc(char c) { boolean_t nolock = mp_kdp_trap || !ml_get_interrupts_enabled(); /* * Note: this lock prevents other cpus interferring with the * output is this one character to the console (screen). It * does not prevent multiple printfs being interleaved - that's * the responsibility of the caller. Without this lock, * an unreadable black-on-black or white-on-white display may result. * We avoid taking this lock, however, if we're in the debugger or * at interrupt level. */ if (!nolock) simple_lock(&mp_putc_lock); vcputc(0, 0, c); if (c == '\n') vcputc(0, 0,'\r'); if (!nolock) simple_unlock(&mp_putc_lock); }