/* * Copyright (c) 2000-2002 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved. * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this * file. * * The 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, QUIET ENJOYMENT 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); }