#include <common/error.h>
#include <assert.h>
+static const char *lttng_action_type_string(enum lttng_action_type action_type)
+{
+ switch (action_type) {
+ case LTTNG_ACTION_TYPE_UNKNOWN:
+ return "UNKNOWN";
+ case LTTNG_ACTION_TYPE_NOTIFY:
+ return "NOTIFY";
+ default:
+ return "???";
+ }
+}
+
enum lttng_action_type lttng_action_get_type(struct lttng_action *action)
{
return action ? action->type : LTTNG_ACTION_TYPE_UNKNOWN;
return action->type;
}
+LTTNG_HIDDEN
+void lttng_action_init(
+ struct lttng_action *action,
+ enum lttng_action_type type,
+ action_validate_cb validate,
+ action_serialize_cb serialize,
+ action_destroy_cb destroy)
+{
+ action->type = type;
+ action->validate = validate;
+ action->serialize = serialize;
+ action->destroy = destroy;
+}
+
void lttng_action_destroy(struct lttng_action *action)
{
if (!action) {
LTTNG_HIDDEN
ssize_t lttng_action_create_from_buffer(const struct lttng_buffer_view *view,
- struct lttng_action **_action)
+ struct lttng_action **action)
{
- ssize_t ret, action_size = sizeof(struct lttng_action_comm);
- struct lttng_action *action;
+ ssize_t consumed_len, specific_action_consumed_len;
const struct lttng_action_comm *action_comm;
+ action_create_from_buffer_cb create_from_buffer_cb;
+ struct lttng_buffer_view specific_action_view;
- if (!view || !_action) {
- ret = -1;
+ if (!view || !action) {
+ consumed_len = -1;
goto end;
}
action_comm = (const struct lttng_action_comm *) view->data;
- DBG("Deserializing action from buffer");
+
+ DBG("Create action from buffer: action-type=%s",
+ lttng_action_type_string(action_comm->action_type));
+
switch (action_comm->action_type) {
case LTTNG_ACTION_TYPE_NOTIFY:
- action = lttng_action_notify_create();
+ create_from_buffer_cb = lttng_action_notify_create_from_buffer;
break;
default:
- ret = -1;
+ ERR("Failed to create action from buffer, unhandled action type: action-type=%u (%s)",
+ action_comm->action_type,
+ lttng_action_type_string(
+ action_comm->action_type));
+ consumed_len = -1;
goto end;
}
- if (!action) {
- ret = -1;
+ /* Create buffer view for the action-type-specific data. */
+ specific_action_view = lttng_buffer_view_from_view(view,
+ sizeof(struct lttng_action_comm),
+ view->size - sizeof(struct lttng_action_comm));
+
+ specific_action_consumed_len =
+ create_from_buffer_cb(&specific_action_view, action);
+ if (specific_action_consumed_len < 0) {
+ ERR("Failed to create specific action from buffer.");
+ consumed_len = -1;
goto end;
}
- ret = action_size;
- *_action = action;
+
+ assert(*action);
+
+ consumed_len = sizeof(struct lttng_action_comm) +
+ specific_action_consumed_len;
+
end:
- return ret;
+ return consumed_len;
}