tevent: expose tevent_context_init_ops

This can be used to implement wrapper backends,
while passing a private pointer to the backens init function
via ev->additional_data.

metze

2 files changed, 19 insertions, 3 deletions

diff --git a/lib/tevent/tevent.c b/lib/tevent/tevent.c
index 5247b5ec1c..61ffc7edaa 100644
--- a/lib/tevent/tevent.c
+++ b/lib/tevent/tevent.c
@@ -210,8 +210,9 @@ int tevent_common_context_destructor(struct tevent_context *ev)
 
   NOTE: use tevent_context_init() inside of samba!
 */
-static struct tevent_context *tevent_context_init_ops(TALLOC_CTX *mem_ctx,
-						      const struct tevent_ops *ops)
+struct tevent_context *tevent_context_init_ops(TALLOC_CTX *mem_ctx,
+					       const struct tevent_ops *ops,
+					       void *additional_data)
 {
 	struct tevent_context *ev;
 	int ret;
@@ -222,6 +223,7 @@ static struct tevent_context *tevent_context_init_ops(TALLOC_CTX *mem_ctx,
 	talloc_set_destructor(ev, tevent_common_context_destructor);
 
 	ev->ops = ops;
+	ev->additional_data = additional_data;
 
 	ret = ev->ops->context_init(ev);
 	if (ret != 0) {
@@ -253,7 +255,7 @@ struct tevent_context *tevent_context_init_byname(TALLOC_CTX *mem_ctx,
 
 	for (e=tevent_backends;e;e=e->next) {
 		if (strcmp(name, e->name) == 0) {
-			return tevent_context_init_ops(mem_ctx, e->ops);
+			return tevent_context_init_ops(mem_ctx, e->ops, NULL);
 		}
 	}
 	return NULL;
diff --git a/lib/tevent/tevent.h b/lib/tevent/tevent.h
index c8719fa4f1..dc61912be7 100644
--- a/lib/tevent/tevent.h
+++ b/lib/tevent/tevent.h
@@ -126,6 +126,20 @@ struct tevent_context *tevent_context_init(TALLOC_CTX *mem_ctx);
 struct tevent_context *tevent_context_init_byname(TALLOC_CTX *mem_ctx, const char *name);
 
 /**
+ * @brief Create a custom event context
+ *
+ * @param[in]  mem_ctx  The memory context to use.
+ * @param[in]  ops      The function pointer table of the backend.
+ * @param[in]  additional_data  The additional/private data to this instance
+ *
+ * @return              An allocated tevent context, NULL on error.
+ *
+ */
+struct tevent_context *tevent_context_init_ops(TALLOC_CTX *mem_ctx,
+					       const struct tevent_ops *ops,
+					       void *additional_data);
+
+/**
  * @brief List available backends.
  *
  * @param[in]  mem_ctx  The memory context to use.