src/include/pcp/pmjson.h

   1 /*
   2  * Copyright (c) 2015-2017 Red Hat.
   3  *
   4  * This library is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU Lesser General Public License as published
   6  * by the Free Software Foundation; either version 2.1 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
  12  * License for more details.
  13  *
  14  * Javascript Object Notation metric value extraction (libpcp_web)
  15  */
  16 #ifndef PCP_PMJSON_H
  17 #define PCP_PMJSON_H
  18
  19 #ifdef __cplusplus
  20 extern "C" {
  21 #endif
  22
  23 typedef enum json_flags {
  24     pmjson_flag_bitfield = (1<<0),
  25     pmjson_flag_boolean  = (1<<1),
  26     pmjson_flag_s32      = (1<<2),
  27     pmjson_flag_u32      = (1<<3),
  28     pmjson_flag_s64      = (1<<4),
  29     pmjson_flag_u64      = (1<<5),
  30     pmjson_flag_float    = (1<<6),
  31     pmjson_flag_double   = (1<<7),
  32 } json_flags;
  33
  34 typedef struct json_metric_desc {
  35     char          *json_pointer;        /* json pointer to metric */
  36     json_flags    flags;                /* flags to check if set */
  37     int           num_values;           /* number of values */
  38     pmAtomValue   values;               /* metric value */
  39     char          *dom;                 /* instance name */
  40 } json_metric_desc;
  41
  42 typedef int (*json_get)(char *, int, void *);
  43 PCP_CALL extern int pmjsonGet(json_metric_desc *, int, pmInDom, json_get, void *);
  44
  45 PCP_CALL extern int pmjsonInit(int fd, json_metric_desc *, int);
  46 PCP_CALL extern int pmjsonInitIndom(int fd, json_metric_desc *, int, pmInDom);
  47
  48 #ifdef __cplusplus
  49 }
  50 #endif
  51
  52 #endif /* PCP_PMJSON_H */