atom.h

含有完整TCP/IP PPP协议的嵌入式操作系统

/*
 * Copyright (C) 2001-2005 by egnite Software GmbH. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY EGNITE SOFTWARE GMBH AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL EGNITE
 * SOFTWARE GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * For additional information see http://www.ethernut.de/
 *
 */

/*
 * $Log: atom.h,v $
 * Revision 1.1  2005/05/27 17:41:52  drsung
 * Moved the file.
 *
 * Revision 1.1  2005/05/26 10:08:42  drsung
 * Moved the platform dependend code from include/sys/atom.h to this file.
 *
 *
 */

#ifndef _SYS_ATOM_H_
#error "Do not include this file directly. Use sys/atom.h instead!"
#endif

__BEGIN_DECLS
#define AtomicInc(p)     (++(*p))
#define AtomicDec(p)     (--(*p))
#define NutEnterCritical()                     \
    {                                          \
        u_char __ccr__;                        \
        asm volatile(                          \
            "stc.b ccr, %0l"            "\n\t" \
            "orc.b #0xc0, ccr":"=r"(__ccr__):  \
        );
#define NutExitCritical()                      \
       asm volatile(                           \
        "ldc.b %0l, ccr"::"r"(__ccr__)         \
       );                                      \
    }
#define NutJumpOutCritical()                   \
       asm volatile(                           \
        "ldc.b %0l, ccr"::"r"(__ccr__)         \
       );
#define NutEnableInt(ccr)                      \
    {                                          \
        u_char __ccr__;                        \
        asm volatile(                          \
            "stc.b ccr, %0l"            "\n\t" \
            "andc.b #0x3f, ccr":"=r"(__ccr__): \
        );
#define NutDisableInt() NutExitCritical()
/* #define NutEnterCritical(ccr) NutDisableInt(ccr) */
/* #define NutExitCritical(ccr) NutRestoreInt(ccr) */
__END_DECLS