Implement dynamic types, and application context provider support

[deliverable/lttng-ust.git] / include / lttng / ust-context-provider.h

diff --git a/include/lttng/ust-context-provider.h b/include/lttng/ust-context-provider.h
new file mode 100644 (file)
index 0000000..5b266fa
--- /dev/null
+++ b/include/lttng/ust-context-provider.h
@@ -0,0 +1,65 @@
+#ifndef _LTTNG_UST_CONTEXT_PROVIDER_H
+#define _LTTNG_UST_CONTEXT_PROVIDER_H
+
+/*
+ * Copyright 2016 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <lttng/ust-events.h>
+#include <urcu/hlist.h>
+
+struct lttng_ust_context_provider {
+       char *name;
+       size_t (*get_size)(struct lttng_ctx_field *field, size_t offset);
+       void (*record)(struct lttng_ctx_field *field,
+                      struct lttng_ust_lib_ring_buffer_ctx *ctx,
+                      struct lttng_channel *chan);
+       void (*get_value)(struct lttng_ctx_field *field,
+                        struct lttng_ctx_value *value);
+       struct cds_hlist_node node;
+};
+
+int lttng_ust_context_provider_register(struct lttng_ust_context_provider *provider);
+void lttng_ust_context_provider_unregister(struct lttng_ust_context_provider *provider);
+
+int lttng_context_is_app(const char *name);
+
+void lttng_ust_context_set_session_provider(const char *name,
+               size_t (*get_size)(struct lttng_ctx_field *field, size_t offset),
+               void (*record)(struct lttng_ctx_field *field,
+                       struct lttng_ust_lib_ring_buffer_ctx *ctx,
+                       struct lttng_channel *chan),
+               void (*get_value)(struct lttng_ctx_field *field,
+                       struct lttng_ctx_value *value));
+
+int lttng_ust_add_app_context_to_ctx_rcu(const char *name, struct lttng_ctx **ctx);
+int lttng_ust_context_set_provider_rcu(struct lttng_ctx **_ctx,
+               const char *name,
+               size_t (*get_size)(struct lttng_ctx_field *field, size_t offset),
+               void (*record)(struct lttng_ctx_field *field,
+                       struct lttng_ust_lib_ring_buffer_ctx *ctx,
+                       struct lttng_channel *chan),
+               void (*get_value)(struct lttng_ctx_field *field,
+                       struct lttng_ctx_value *value));
+int lttng_context_add_rcu(struct lttng_ctx **ctx_p,
+               const struct lttng_ctx_field *f);
+
+#endif /* _LTTNG_UST_CONTEXT_PROVIDER_H */