include/lttng/ust-context-provider.h

   1 /*
   2  * SPDX-License-Identifier: MIT
   3  *
   4  * Copyright (C) 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  */
   6
   7 #ifndef _LTTNG_UST_CONTEXT_PROVIDER_H
   8 #define _LTTNG_UST_CONTEXT_PROVIDER_H
   9
  10 #include <stddef.h>
  11 #include <lttng/ust-events.h>
  12 #include <urcu/hlist.h>
  13
  14 struct lttng_ust_context_provider {
  15         char *name;
  16         size_t (*get_size)(struct lttng_ctx_field *field, size_t offset);
  17         void (*record)(struct lttng_ctx_field *field,
  18                        struct lttng_ust_lib_ring_buffer_ctx *ctx,
  19                        struct lttng_channel *chan);
  20         void (*get_value)(struct lttng_ctx_field *field,
  21                          struct lttng_ctx_value *value);
  22         struct cds_hlist_node node;
  23 };
  24
  25 int lttng_ust_context_provider_register(struct lttng_ust_context_provider *provider);
  26 void lttng_ust_context_provider_unregister(struct lttng_ust_context_provider *provider);
  27
  28 int lttng_context_is_app(const char *name);
  29
  30 void lttng_ust_context_set_session_provider(const char *name,
  31                 size_t (*get_size)(struct lttng_ctx_field *field, size_t offset),
  32                 void (*record)(struct lttng_ctx_field *field,
  33                         struct lttng_ust_lib_ring_buffer_ctx *ctx,
  34                         struct lttng_channel *chan),
  35                 void (*get_value)(struct lttng_ctx_field *field,
  36                         struct lttng_ctx_value *value));
  37
  38 int lttng_ust_add_app_context_to_ctx_rcu(const char *name, struct lttng_ctx **ctx);
  39 int lttng_ust_context_set_provider_rcu(struct lttng_ctx **_ctx,
  40                 const char *name,
  41                 size_t (*get_size)(struct lttng_ctx_field *field, size_t offset),
  42                 void (*record)(struct lttng_ctx_field *field,
  43                         struct lttng_ust_lib_ring_buffer_ctx *ctx,
  44                         struct lttng_channel *chan),
  45                 void (*get_value)(struct lttng_ctx_field *field,
  46                         struct lttng_ctx_value *value));
  47 int lttng_context_add_rcu(struct lttng_ctx **ctx_p,
  48                 const struct lttng_ctx_field *f);
  49
  50 #endif /* _LTTNG_UST_CONTEXT_PROVIDER_H */