Archipelago » blktap-utils

/*

 * Copyright (c) 2010, Citrix Systems, Inc.

 *

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 * modification, are permitted provided that the following conditions are met:

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 *     * Redistributions in binary form must reproduce the above copyright

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 *       may be used to endorse or promote products derived from this software

 *       without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 THE COPYRIGHT OWNER

 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

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 */

#ifndef _TAPDISK_STATS_H_

#define _TAPDISK_STATS_H_

#include <string.h>

#define TD_STATS_MAX_DEPTH 8

struct tapdisk_stats_ctx {

        void           *pos;

        void           *buf;

        size_t          size;

        int             n_elem[TD_STATS_MAX_DEPTH];

        int             depth;

};

typedef struct tapdisk_stats_ctx td_stats_t;

static inline void

tapdisk_stats_init(td_stats_t *st, char *buf, size_t size)

{

        memset(st, 0, sizeof(*st));

        st->pos  = buf;

        st->buf  = buf;

        st->size = size;

}

static inline size_t

tapdisk_stats_length(td_stats_t *st)

{

        return st->pos - st->buf;

}

void tapdisk_stats_enter(td_stats_t *st, char t);

void tapdisk_stats_leave(td_stats_t *st, char t);

void tapdisk_stats_field(td_stats_t *st, const char *key, const char *conv, ...);

void tapdisk_stats_val(td_stats_t *st, const char *conv, ...);

#endif /* _TAPDISK_STATS_H_ */