counter.c File Reference
`#include <string.h>`
`#include <osmocom/core/linuxlist.h>`
`#include <osmocom/core/talloc.h>`
`#include <osmocom/core/counter.h>`

## Functions

static | LLIST_HEAD (counters)
struct osmo_counter * | osmo_counter_alloc (const char *name)
| Allocate a new counter with given name. More...
void | osmo_counter_free (struct osmo_counter *ctr)
| Release/Destroy a given counter. More...
int | osmo_counters_for_each (int(*handle_counter)(struct osmo_counter *, void *), void *data)
| Iterate over all counters; call handle_cunter call-back for each. More...
int | osmo_counters_count ()
| Counts the registered counter. More...
struct osmo_counter * | osmo_counter_get_by_name (const char *name)
| Find a counter by its name. More...
int | osmo_counter_difference (struct osmo_counter *ctr)
| Compute difference between current and previous counter value. More...

## Variables

void * | tall_ctr_ctx
| Global talloc context for all osmo_counter allocations. More...

## Detailed Description

utility routines for keeping some statistics.

## Function Documentation

## LLIST_HEAD()

static LLIST_HEAD | ( | counters |  | ) |

static

## osmo_counter_alloc()

struct osmo_counter* osmo_counter_alloc | ( | const char * | name | ) |

Allocate a new counter with given name.

Allocates from tall_ctr_ctx

Parameters

  [in] | name | Human-readable string name for the counter

Returns
  Allocated counter on success; NULL on error

References osmo_counter::list, llist_add_tail(), osmo_counter::name, name, and tall_ctr_ctx.

## osmo_counter_difference()

int osmo_counter_difference | ( | struct osmo_counter * | ctr | ) |

Compute difference between current and previous counter value.

Parameters

  [in] | ctr | Counter of which the difference is to be computed

Returns
  Delta value between current counter and previous counter. Please note that the actual counter values are unsigned long, while the difference is computed as signed integer!

References osmo_counter::previous, and osmo_counter::value.

Referenced by handle_counter().

## osmo_counter_free()

void osmo_counter_free | ( | struct osmo_counter * | ctr | ) |

Release/Destroy a given counter.

Parameters

  [in] | ctr | Counter to be destroyed

References osmo_counter::list, and llist_del().

## osmo_counter_get_by_name()

struct osmo_counter* osmo_counter_get_by_name | ( | const char * | name | ) |

Find a counter by its name.

Parameters

  [in] | name | Name used to look-up/search counter

Returns
  Counter on success; NULL if not found

References osmo_counter::list, llist_for_each_entry, osmo_counter::name, and name.

## osmo_counters_count()

int osmo_counters_count | ( |  | ) |

Counts the registered counter.

Returns
  amount of counters

References llist_count().

## osmo_counters_for_each()

int osmo_counters_for_each | ( | int(*)(struct osmo_counter *, void *) | handle_counter,
|  | void * | data
| ) |  |

Iterate over all counters; call handle_cunter call-back for each.

Parameters

  [in] | handle_counter | Call-back to be called for each counter; aborts if rc < 0
  [in] | data | Opaque data passed through to handle_counter function

Returns
  0 if all handle_counter calls successfull; negative on error

References handle_counter(), osmo_counter::list, and llist_for_each_entry.

Referenced by osmo_stats_report().

## Variable Documentation

## tall_ctr_ctx

void* tall_ctr_ctx

Global talloc context for all osmo_counter allocations.

Referenced by osmo_counter_alloc().