kstats_wrapper.h

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/* 
 * $Id$
 * 
 * Copyright (C) 2010 iptelorg GmbH
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
/*
 * History:
 * --------
 *  2010-08-08  initial version (andrei)
 *  2010-08-18  type declaration needed by sr_module.c moved to
 *               ../../kstats_types.h (andrei)
*/

#ifndef __kstats_wrapper_h
#define __kstats_wrapper_h

#include "../../counters.h"
#include "../../kstats_types.h"

/* k stat flags */
#define STAT_NO_RESET   1  /* used in dialog(k), nat_traversal(k),
                                                          registrar(k), statistics(k), usrloc(k) */
/* #define STAT_NO_SYN  2  -- not used */
#define STAT_SHM_NAME   4 /* used only from usrloc(k) */
#define STAT_IS_FUNC    8



#ifdef STATISTICS

/* statistics support check */
#define stats_support() 1

int register_stat( char *module, char *name, stat_var **pvar, int flags);
int register_module_stats(char *module, stat_export_t *stats);

inline static stat_var* get_stat(str *name)
{
        counter_handle_t h;
        str grp;
        
        grp.s = 0;
        grp.len = 0;
        if (counter_lookup_str(&h, &grp, name) < 0)
                return 0;
        return (void*)(unsigned long)h.id;
}



inline static unsigned long get_stat_val(stat_var *v)
{
        counter_handle_t h;
        h.id = (unsigned short)(unsigned long)v;
        return (unsigned long)counter_get_val(h);
}



inline static char* get_stat_name(stat_var *v)
{
        counter_handle_t h;
        h.id = (unsigned short)(unsigned long)v;
        return counter_get_name(h);
}



inline static char* get_stat_module(stat_var *v)
{
        counter_handle_t h;
        h.id = (unsigned short)(unsigned long)v;
        return counter_get_group(h);
}



inline static void update_stat(stat_var* v, int n)
{
        counter_handle_t h;
        h.id = (unsigned short)(unsigned long)v;
        counter_add(h, n);
}



inline static void reset_stat(stat_var* v)
{
        counter_handle_t h;
        h.id = (unsigned short)(unsigned long)v;
        counter_reset(h);
}


#define if_update_stat(c, var, n) \
        do{ \
                if ((c)) update_stat((var), (n)); \
        }while(0)

#define if_reset_stat(c, var) \
        do{ \
                if ((c)) reset_stat((var)); \
        }while(0)

#else /* STATISTICS */

/* statistics support check */
#define stats_support() 0
#define register_module_stats(mod, stats) 0
#define register_stat(mod, name, var, flags) 0
#define get_stat(name)  0
#define get_stat_val(var) 0
#define update_stat(v, n)
#define reset_stat(v)
#define if_update_stat(c, v, n)
#define if_reset_stat(c, v)

#endif /* STATISTICS */

#endif /*__kstats_wrapper_h*/

/* vi: set ts=4 sw=4 tw=79:ai:cindent: */