/*      $NetBSD: altq_rmclass_debug.h,v 1.7 2006/10/12 19:59:08 peter Exp $     */
/*      $KAME: altq_rmclass_debug.h,v 1.3 2002/11/29 04:36:24 kjc Exp $ */

/*
 * Copyright (c) Sun Microsystems, Inc. 1998 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the SMCC Technology
 *      Development Group at Sun Microsystems, Inc.
 *
 * 4. The name of the Sun Microsystems, Inc nor may not be used to endorse or
 *      promote products derived from this software without specific prior
 *      written permission.
 *
 * SUN MICROSYSTEMS DOES NOT CLAIM MERCHANTABILITY OF THIS SOFTWARE OR THE
 * SUITABILITY OF THIS SOFTWARE FOR ANY PARTICULAR PURPOSE.  The software is
 * provided "as is" without express or implied warranty of any kind.
 *
 * These notices must be retained in any copies of any part of this software.
 */

#ifndef _ALTQ_ALTQ_RMCLASS_DEBUG_H_
#define _ALTQ_ALTQ_RMCLASS_DEBUG_H_

/* #pragma ident        "@(#)rm_class_debug.h   1.7     98/05/04 SMI" */

/*
 * Cbq debugging macros
 */

#ifdef __cplusplus
extern "C" {
#endif

#ifdef  CBQ_TRACE
#ifndef NCBQTRACE
#define NCBQTRACE (16 * 1024)
#endif

/*
 * To view the trace output, using adb, type:
 *      adb -k /dev/ksyms /dev/mem <cr>, then type
 *      cbqtrace_count/D to get the count, then type
 *      cbqtrace_buffer,0tcount/Dp4C" "Xn
 *      This will dump the trace buffer from 0 to count.
 */
/*
 * in ALTQ, "call cbqtrace_dump(N)" from DDB to display 20 events
 * from Nth event in the circular buffer.
 */

struct cbqtrace {
        int count;
        int function;           /* address of function */
        int trace_action;       /* descriptive 4 characters */
        int object;             /* object operated on */
};

extern struct cbqtrace cbqtrace_buffer[];
extern struct cbqtrace *cbqtrace_ptr;
extern int cbqtrace_count;

#define CBQTRACEINIT() {                                \
        if (cbqtrace_ptr == NULL)               \
                cbqtrace_ptr = cbqtrace_buffer; \
        else { \
                cbqtrace_ptr = cbqtrace_buffer; \
                (void)memset(cbqtrace_ptr, 0, sizeof(cbqtrace_buffer)); \
                cbqtrace_count = 0; \
        } \
}

#define LOCK_TRACE()    splnet()
#define UNLOCK_TRACE(x) splx(x)

#define CBQTRACE(func, act, obj) {              \
        int __s = LOCK_TRACE();                 \
        int *_p = &cbqtrace_ptr->count; \
        *_p++ = ++cbqtrace_count;               \
        *_p++ = (int)(func);                    \
        *_p++ = (int)(act);                     \
        *_p++ = (int)(obj);                     \
        if ((struct cbqtrace *)(void *)_p >= &cbqtrace_buffer[NCBQTRACE])\
                cbqtrace_ptr = cbqtrace_buffer; \
        else                                    \
                cbqtrace_ptr = (struct cbqtrace *)(void *)_p; \
        UNLOCK_TRACE(__s);                      \
        }
#else

/* If no tracing, define no-ops */
#define CBQTRACEINIT()
#define CBQTRACE(a, b, c)

#endif  /* !CBQ_TRACE */

#ifdef __cplusplus
}
#endif

#endif  /* _ALTQ_ALTQ_RMCLASS_DEBUG_H_ */