/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#ifndef _FMD_TRACE_H
#define _FMD_TRACE_H

#include <sys/types.h>
#include <stdarg.h>

#ifdef  __cplusplus
extern "C" {
#endif

typedef struct fmd_tracerec {
        hrtime_t tr_time;       /* high-resolution timestamp */
        const char *tr_file;    /* source file name */
        uint32_t tr_line;       /* source file line */
        uint16_t tr_errno;      /* errno value if error */
        uint8_t tr_tag;         /* tag (see <fmd_subr.h>) */
        uint8_t tr_depth;       /* depth of tr_stack[] */
        char tr_msg[64];        /* formatted message */
        uintptr_t tr_stack[1];  /* stack trace (optional) */
} fmd_tracerec_t;

typedef struct fmd_tracebuf {
        fmd_tracerec_t *tb_buf; /* pointer to first trace record */
        fmd_tracerec_t *tb_end; /* pointer to last trace record */
        fmd_tracerec_t *tb_ptr; /* next trace record to use */
        uint_t tb_frames;       /* maximum captured frames */
        uint_t tb_recs;         /* number of trace records */
        uint_t tb_size;         /* size of each record */
        uint_t tb_depth;        /* recursion depth of trace function */
} fmd_tracebuf_t;

typedef fmd_tracerec_t *fmd_tracebuf_f(fmd_tracebuf_t *,
    uint_t, const char *, va_list);

extern fmd_tracebuf_t *fmd_trace_create(void);
extern void fmd_trace_destroy(fmd_tracebuf_t *);

extern fmd_tracebuf_f fmd_trace_none;
extern fmd_tracebuf_f fmd_trace_lite;
extern fmd_tracebuf_f fmd_trace_full;

#ifdef  __cplusplus
}
#endif

#endif  /* _FMD_TRACE_H */