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From:   =?UTF-8?q?Micha=C5=82=20Lowas-Rzechonek?= 
        <michal.lowas-rzechonek@silvair.com>
To:     linux-bluetooth@vger.kernel.org
Subject: [PATCH BlueZ v3 1/5] mesh: Convert void pointers to anonymous unions in managed_obj_request
Date:   Thu, 25 Jul 2019 10:14:20 +0200
Message-Id: <20190725081424.22621-2-michal.lowas-rzechonek@silvair.com>
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References: <20190725081424.22621-1-michal.lowas-rzechonek@silvair.com>
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---
 mesh/node.c | 75 +++++++++++++++++++++++++----------------------------
 1 file changed, 35 insertions(+), 40 deletions(-)

diff --git a/mesh/node.c b/mesh/node.c
index ceb46e4df..e51913edf 100644
--- a/mesh/node.c
+++ b/mesh/node.c
@@ -58,9 +58,11 @@
 #define DEFAULT_CRPL 10
 #define DEFAULT_SEQUENCE_NUMBER 0
 
-#define REQUEST_TYPE_JOIN 0
-#define REQUEST_TYPE_ATTACH 1
-#define REQUEST_TYPE_CREATE 2
+enum request_type {
+	REQUEST_TYPE_JOIN,
+	REQUEST_TYPE_ATTACH,
+	REQUEST_TYPE_CREATE,
+};
 
 struct node_element {
 	char *path;
@@ -110,10 +112,16 @@ struct mesh_node {
 };
 
 struct managed_obj_request {
-	void *data;
-	void *cb;
-	void *user_data;
-	uint8_t type;
+	union {
+		const uint8_t *uuid;
+		struct mesh_node *node;
+	};
+	union {
+		node_ready_func_t ready_cb;
+		node_join_ready_func_t join_ready_cb;
+	};
+	struct l_dbus_message *pending_msg;
+	enum request_type type;
 };
 
 static struct l_queue *nodes;
@@ -1571,7 +1579,7 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 		node = l_new(struct mesh_node, 1);
 		node->elements = l_queue_new();
 	} else {
-		node = req->data;
+		node = req->node;
 	}
 
 	num_ele = 0;
@@ -1642,8 +1650,6 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 	}
 
 	if (req->type == REQUEST_TYPE_ATTACH) {
-		node_ready_func_t cb = req->cb;
-
 		if (num_ele != node->num_ele)
 			goto fail;
 
@@ -1652,7 +1658,7 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 
 			node->disc_watch = l_dbus_add_disconnect_watch(bus,
 					node->owner, app_disc_cb, node, NULL);
-			cb(req->user_data, MESH_ERROR_NONE, node);
+			req->ready_cb(req->pending_msg, MESH_ERROR_NONE, node);
 		} else
 			goto fail;
 
@@ -1665,8 +1671,6 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 		init_storage_dir(node);
 
 	} else if (req->type == REQUEST_TYPE_JOIN) {
-		node_join_ready_func_t cb = req->cb;
-
 		if (!agent) {
 			l_error("Interface %s not found",
 						MESH_PROVISION_AGENT_INTERFACE);
@@ -1675,22 +1679,20 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 
 		node->num_ele = num_ele;
 		set_defaults(node);
-		memcpy(node->uuid, req->data, 16);
+		memcpy(node->uuid, req->uuid, 16);
 
 		if (!create_node_config(node, node->uuid))
 			goto fail;
 
-		cb(node, agent);
-
+		req->join_ready_cb(node, agent);
 	} else {
 		/* Callback for create node request */
-		node_ready_func_t cb = req->cb;
 		struct keyring_net_key net_key;
 		uint8_t dev_key[16];
 
 		node->num_ele = num_ele;
 		set_defaults(node);
-		memcpy(node->uuid, req->data, 16);
+		memcpy(node->uuid, req->uuid, 16);
 
 		if (!create_node_config(node, node->uuid))
 			goto fail;
@@ -1717,7 +1719,7 @@ static void get_managed_objects_cb(struct l_dbus_message *msg, void *user_data)
 		if (!keyring_put_net_key(node, PRIMARY_NET_IDX, &net_key))
 			goto fail;
 
-		cb(req->user_data, MESH_ERROR_NONE, node);
+		req->ready_cb(req->pending_msg, MESH_ERROR_NONE, node);
 	}
 
 	return;
@@ -1726,26 +1728,19 @@ fail:
 		mesh_agent_remove(agent);
 
 	if (!is_new) {
-		/* Handle failed Attach request */
-		node_ready_func_t cb = req->cb;
-
 		free_node_dbus_resources(node);
 
-		cb(req->user_data, MESH_ERROR_FAILED, node);
+		req->ready_cb(req->pending_msg, MESH_ERROR_FAILED, node);
 	} else {
 		/* Handle failed Join and Create requests */
 		if (node)
 			node_remove(node);
 
-		if (req->type == REQUEST_TYPE_JOIN) {
-			node_join_ready_func_t cb = req->cb;
-
-			cb(NULL, NULL);
-		} else {
-			node_ready_func_t cb = req->cb;
-
-			cb(req->user_data, MESH_ERROR_FAILED, NULL);
-		}
+		if (req->type == REQUEST_TYPE_JOIN)
+			req->join_ready_cb(NULL, NULL);
+		else
+			req->ready_cb(req->pending_msg, MESH_ERROR_FAILED,
+									NULL);
 	}
 }
 
@@ -1770,9 +1765,9 @@ int node_attach(const char *app_path, const char *sender, uint64_t token,
 	node->owner = l_strdup(sender);
 
 	req = l_new(struct managed_obj_request, 1);
-	req->data = node;
-	req->cb = cb;
-	req->user_data = user_data;
+	req->node = node;
+	req->ready_cb = cb;
+	req->pending_msg = user_data;
 	req->type = REQUEST_TYPE_ATTACH;
 
 	l_dbus_method_call(dbus_get_bus(), sender, app_path,
@@ -1794,8 +1789,8 @@ void node_join(const char *app_path, const char *sender, const uint8_t *uuid,
 	l_debug("");
 
 	req = l_new(struct managed_obj_request, 1);
-	req->data = (void *) uuid;
-	req->cb = cb;
+	req->uuid = uuid;
+	req->join_ready_cb = cb;
 	req->type = REQUEST_TYPE_JOIN;
 
 	l_dbus_method_call(dbus_get_bus(), sender, app_path,
@@ -1813,9 +1808,9 @@ void node_create(const char *app_path, const char *sender, const uint8_t *uuid,
 	l_debug("");
 
 	req = l_new(struct managed_obj_request, 1);
-	req->data = (void *) uuid;
-	req->cb = cb;
-	req->user_data = user_data;
+	req->uuid = uuid;
+	req->ready_cb = cb;
+	req->pending_msg = user_data;
 	req->type = REQUEST_TYPE_CREATE;
 
 	l_dbus_method_call(dbus_get_bus(), sender, app_path,
-- 
2.19.1