X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=ltt-context.c;h=e9a45f3c50a4de6480a7fc3528d80c40a8895ff1;hb=056f5922eb9235d9163fe7535ce2f803ab8b05dd;hp=e0cd073c9c09d854c236b23bb370a224546a8a6a;hpb=77aefe99a8d5ba7360ef199ef34bc85edf34ec21;p=lttng-modules.git

diff --git a/ltt-context.c b/ltt-context.c
index e0cd073c..e9a45f3c 100644
--- a/ltt-context.c
+++ b/ltt-context.c
@@ -4,6 +4,8 @@
  * Copyright 2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  *
  * LTTng trace/channel/event context management.
+ *
+ * Dual LGPL v2.1/GPL v2 license.
  */
 
 #include <linux/module.h>
@@ -14,6 +16,21 @@
 #include "ltt-events.h"
 #include "ltt-tracer.h"
 
+int lttng_find_context(struct lttng_ctx *ctx, const char *name)
+{
+	unsigned int i;
+
+	for (i = 0; i < ctx->nr_fields; i++) {
+		/* Skip allocated (but non-initialized) contexts */
+		if (!ctx->fields[i].event_field.name)
+			continue;
+		if (!strcmp(ctx->fields[i].event_field.name, name))
+			return 1;
+	}
+	return 0;
+}
+EXPORT_SYMBOL_GPL(lttng_find_context);
+
 struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx_p)
 {
 	struct lttng_ctx_field *field;
@@ -43,6 +60,17 @@ struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx_p)
 }
 EXPORT_SYMBOL_GPL(lttng_append_context);
 
+void lttng_remove_context_field(struct lttng_ctx **ctx_p,
+				struct lttng_ctx_field *field)
+{
+	struct lttng_ctx *ctx;
+
+	ctx = *ctx_p;
+	ctx->nr_fields--;
+	memset(&ctx->fields[ctx->nr_fields], 0, sizeof(struct lttng_ctx_field));
+}
+EXPORT_SYMBOL_GPL(lttng_remove_context_field);
+
 void lttng_destroy_context(struct lttng_ctx *ctx)
 {
 	int i;