graphing/fsample.h

   1 #ifndef __FSAMPLE_H
   2 #define __FSAMPLE_H
   3
   4 #include <sys/types.h>
   5
   6 typedef u_int32_t fsample_t;
   7
   8 typedef struct fsample fsample;
   9
  10 /* nice loss of type safety here... */
  11 typedef void *(*CoreHandlerAddFn)(void *handler, void *arg);
  12 typedef void (*CoreHandlerDelFn)(void *);
  13
  14 /* single sample functions */
  15 fsample *fsopen(char *filename, size_t samples, CoreHandlerAddFn chafn, CoreHandlerDelFn chdfn);
  16 void fsclose(fsample *f);
  17 inline void fsset(fsample *f, fsample_t pos, fsample_t value);
  18 inline fsample_t fsget(fsample *f, fsample_t pos, fsample_t *t);
  19 inline fsample_t fsget_r(fsample *f, fsample_t pos, fsample_t *t);
  20
  21 struct fsample_m;
  22 typedef fsample_t (*DeriveValueFn)(struct fsample_m *v, int entry, fsample_t pos, void *tag);
  23
  24 typedef struct fsample_m_entry {
  25   size_t freq;
  26   fsample *f;
  27   void *tag;
  28   DeriveValueFn derive;
  29 } fsample_m_entry;
  30
  31 typedef struct fsample_m {
  32   size_t pos, samples;
  33   CoreHandlerAddFn chafn;
  34   CoreHandlerDelFn chdfn;
  35   struct fsample_m_entry entry[];
  36 } fsample_m;
  37
  38 /* multiple sample functions */
  39 fsample_m *fsopen_m(size_t count, char *filename, size_t samples, CoreHandlerAddFn chafn, CoreHandlerDelFn chdfn);
  40 void fsclose_m(fsample_m *f);
  41 int fsadd_m(fsample_m *f, char *filename, size_t freq, DeriveValueFn derive, void *tag);
  42 void fsset_m(fsample_m *f, fsample_t pos, fsample_t value);
  43 inline fsample_t fsget_m(fsample_m *f, int entry, fsample_t pos, fsample_t *t);
  44 inline fsample_t fsget_mr(fsample_m *f, int entry, fsample_t pos, fsample_t *t);
  45
  46 /* aggregates */
  47 fsample_t fsamean(fsample_m *f, int entry, fsample_t pos, void *tag);
  48 fsample_t fsapmean(fsample_m *f, int entry, fsample_t pos, void *tag);
  49
  50 #endif