LCOV - code coverage report
Current view: top level - builddir/build/BUILD/blktap-3.37.3/drivers - tapdisk-stats.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 3 3 100.0 %
Date: 2022-01-12 12:43:54 Functions: 0 0 -
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /*
       2                 :            :  * Copyright (c) 2016, Citrix Systems, Inc.
       3                 :            :  *
       4                 :            :  * All rights reserved.
       5                 :            :  *
       6                 :            :  * Redistribution and use in source and binary forms, with or without
       7                 :            :  * modification, are permitted provided that the following conditions are met:
       8                 :            :  * 
       9                 :            :  *  1. Redistributions of source code must retain the above copyright
      10                 :            :  *     notice, this list of conditions and the following disclaimer.
      11                 :            :  *  2. Redistributions in binary form must reproduce the above copyright
      12                 :            :  *     notice, this list of conditions and the following disclaimer in the
      13                 :            :  *     documentation and/or other materials provided with the distribution.
      14                 :            :  *  3. Neither the name of the copyright holder nor the names of its 
      15                 :            :  *     contributors may be used to endorse or promote products derived from 
      16                 :            :  *     this software without specific prior written permission.
      17                 :            :  *
      18                 :            :  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      19                 :            :  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      20                 :            :  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      21                 :            :  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
      22                 :            :  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
      23                 :            :  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
      24                 :            :  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
      25                 :            :  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
      26                 :            :  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
      27                 :            :  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
      28                 :            :  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      29                 :            :  */
      30                 :            : 
      31                 :            : #ifndef _TAPDISK_STATS_H_
      32                 :            : #define _TAPDISK_STATS_H_
      33                 :            : 
      34                 :            : #include <string.h>
      35                 :            : 
      36                 :            : #define TD_STATS_MAX_DEPTH 8
      37                 :            : 
      38                 :            : struct tapdisk_stats_ctx {
      39                 :            :         char           *pos;
      40                 :            : 
      41                 :            :         char           *buf;
      42                 :            :         size_t          size;
      43                 :            : 
      44                 :            :         int             n_elem[TD_STATS_MAX_DEPTH];
      45                 :            :         int             depth;
      46                 :            :         int             err;
      47                 :            : };
      48                 :            : 
      49                 :            : typedef struct tapdisk_stats_ctx td_stats_t;
      50                 :            : 
      51                 :            : static inline void
      52                 :            : tapdisk_stats_init(td_stats_t *st, char *buf, size_t size)
      53                 :            : {
      54                 :            :         memset(st, 0, sizeof(*st));
      55                 :            : 
      56                 :          3 :         st->pos  = buf;
      57                 :          3 :         st->buf  = buf;
      58                 :          3 :         st->size = size;
      59                 :            : }
      60                 :            : 
      61                 :            : static inline ssize_t
      62                 :            : tapdisk_stats_length(td_stats_t *st)
      63                 :            : {
      64                 :            :         if (st->err)
      65                 :            :                 return st->err;
      66                 :            : 
      67                 :            :         return st->pos - st->buf;
      68                 :            : }
      69                 :            : 
      70                 :            : void tapdisk_stats_enter(td_stats_t *st, char t);
      71                 :            : void tapdisk_stats_leave(td_stats_t *st, char t);
      72                 :            : void tapdisk_stats_field(td_stats_t *st, const char *key, const char *conv, ...);
      73                 :            : void tapdisk_stats_val(td_stats_t *st, const char *conv, ...);
      74                 :            : 
      75                 :            : #endif /* _TAPDISK_STATS_H_ */

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