X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=lttng-events.h;h=2b1370520ecd85ab4d39364586ee08fe949d1f6a;hb=3c1a57e8ce82366ce96774e4ac1d7481c561cc4c;hp=8dd9241d4cc5d1b77e5fc6b472db4f1aa44deb24;hpb=3834b99f4341209754c4955ec853dc250b33ed4b;p=lttng-modules.git

diff --git a/lttng-events.h b/lttng-events.h
index 8dd9241d..2b137052 100644
--- a/lttng-events.h
+++ b/lttng-events.h
@@ -206,6 +206,9 @@ struct lttng_probe_ctx {
 struct lttng_ctx_field {
 	struct lttng_event_field event_field;
 	size_t (*get_size)(size_t offset);
+	size_t (*get_size_arg)(size_t offset, struct lttng_ctx_field *field,
+	                       struct lib_ring_buffer_ctx *ctx,
+	                       struct lttng_channel *chan);
 	void (*record)(struct lttng_ctx_field *field,
 		       struct lib_ring_buffer_ctx *ctx,
 		       struct lttng_channel *chan);
@@ -216,6 +219,12 @@ struct lttng_ctx_field {
 		struct lttng_perf_counter_field *perf_counter;
 	} u;
 	void (*destroy)(struct lttng_ctx_field *field);
+	/*
+	 * Private data to keep state between get_size and record.
+	 * User must perform its own synchronization to protect against
+	 * concurrent and reentrant contexts.
+	 */
+	void *priv;
 };
 
 struct lttng_ctx {
@@ -705,6 +714,9 @@ int lttng_add_migratable_to_ctx(struct lttng_ctx **ctx)
 	return -ENOSYS;
 }
 #endif
+
+int lttng_add_callstack_to_ctx(struct lttng_ctx **ctx, int type);
+
 #if defined(CONFIG_PERF_EVENTS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,33))
 int lttng_add_perf_counter_to_ctx(uint32_t type,
 				  uint64_t config,