#define MESHLINKPP_H
#include <meshlink.h>
+#include <new> // for 'placement new'
namespace meshlink {
class mesh;
/// A class describing a MeshLink mesh.
class mesh: public meshlink_handle_t {
- public:
- // TODO: delete constructor, add a destructor.
-
+ public:
+ mesh() : meshlink_handle_t() {}
+
+ virtual ~mesh() {
+ meshlink_close(this);
+ }
+
+ /** instead of registerin callbacks you derive your own class and overwrite the following abstract member functions.
+ * These functions are run in MeshLink's own thread.
+ * It is therefore important that these functions use apprioriate methods (queues, pipes, locking, etc.)
+ * to hand the data over to the application's thread.
+ * These functions should also not block itself and return as quickly as possible.
+ * The default member functions are no-ops, so you are not required to overwrite all these member functions
+ */
+
+ /// This function is called whenever another node sends data to the local node.
+ virtual void receive(node* source, const void* data, size_t length) { /* do nothing */ }
+
+ /// This functions is called whenever another node's status changed.
+ virtual void node_status(node* peer, bool reachable) { /* do nothing */ }
+
+ /// This functions is called whenever MeshLink has some information to log.
+ virtual void log(log_level_t level, const char* message) { /* do nothing */ }
+
/// Start MeshLink.
/** This function causes MeshLink to open network sockets, make outgoing connections, and
* create a new thread, which will handle all network I/O.
* @return This function will return true if MeshLink has succesfully started its thread, false otherwise.
*/
bool start() {
+ meshlink_set_receive_cb (this, &receive_trampoline);
+ meshlink_set_node_status_cb(this, &node_status_trampoline);
+ meshlink_set_log_cb (this, MESHLINK_DEBUG, &log_trampoline);
return meshlink_start(this);
}
meshlink_stop(this);
}
- /// Set the receive callback.
- /** This functions sets the callback that is called whenever another node sends data to the local node.
- * The callback is run in MeshLink's own thread.
- * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
- * to hand the data over to the application's thread.
- * The callback should also not block itself and return as quickly as possible.
- *
- * @param cb A pointer to the function which will be called when another node sends data to the local node.
- */
- void set_receive_cb(receive_cb_t cb) {
- meshlink_set_receive_cb(this, (meshlink_receive_cb_t)cb);
- }
-
- /// Set the node status callback.
- /** This functions sets the callback that is called whenever another node's status changed.
- * The callback is run in MeshLink's own thread.
- * It is therefore important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
- * to hand the data over to the application's thread.
- * The callback should also not block itself and return as quickly as possible.
- *
- * @param cb A pointer to the function which will be called when another node's status changes.
- */
- void set_node_status_cb(node_status_cb_t cb) {
- meshlink_set_node_status_cb(this, (meshlink_node_status_cb_t)cb);
- }
-
- /// Set the log callback.
- /** This functions sets the callback that is called whenever MeshLink has some information to log.
- * The callback is run in MeshLink's own thread.
- * It is important that the callback uses apprioriate methods (queues, pipes, locking, etc.)
- * to hand the data over to the application's thread.
- * The callback should also not block itself and return as quickly as possible.
- *
- * @param level An enum describing the minimum severity level. Debugging information with a lower level will not trigger the callback.
- * @param cb A pointer to the function which will be called when another node sends data to the local node.
- */
- void set_log_cb(meshlink_log_level_t level, log_cb_t cb) {
- meshlink_set_log_cb(this, level, (meshlink_log_cb_t)cb);
- }
-
/// Send data to another node.
/** This functions sends one packet of data to another node in the mesh.
* The packet is sent using UDP semantics, which means that
* @param nodes A pointer to an array of pointers to meshlink::node, which should be allocated by the application.
* @param nmemb The maximum number of pointers that can be stored in the nodes array.
*
- * @return The number of known nodes. This can be larger than nmemb, in which case not all nodes were stored in the nodes array.
+ * @return The number of known nodes, or -1 in case of an error.
+ * This can be larger than nmemb, in which case not all nodes were stored in the nodes array.
*/
- size_t get_all_nodes(node **nodes, size_t nmemb) {
- return meshlink_get_all_nodes(this, (meshlink_node_t **)nodes, nmemb);
+ node **get_all_nodes(node **nodes, size_t *nmemb) {
+ return (node **)meshlink_get_all_nodes(this, (meshlink_node_t **)nodes, nmemb);
}
/// Sign data using the local node's MeshLink key.
* to hand the data over to the application's thread.
* The callback should also not block itself and return as quickly as possible.
*
+ * @param channel A handle for the channel.
* @param cb A pointer to the function which will be called when another node sends data to the local node.
*/
void set_channel_accept_cb(channel *channel, channel_accept_cb_t cb) {
*
* @return A handle for the channel, or NULL in case of an error.
*/
- channel *channel_open(node *node, uint16_t port, channel_receive_cb_t recv, const void *data, size_t len) {
- return (channel *)meshlink_channel_open(this, node, port, (meshlink_channel_receive_cb_t)recv, data, len);
+ channel *channel_open(node *node, uint16_t port, channel_receive_cb_t cb, const void *data, size_t len) {
+ return (channel *)meshlink_channel_open(this, node, port, (meshlink_channel_receive_cb_t)cb, data, len);
}
/// Partially close a reliable stream channel.
return meshlink_channel_send(this, channel, data, len);
}
+ private:
+ // non-copyable:
+ mesh(const mesh&) /* TODO: C++11: = delete */;
+ void operator=(const mesh&) /* TODO: C++11: = delete */ ;
+
+ /// static callback trampolines:
+ static void receive_trampoline(meshlink_handle_t* handle, meshlink_node_t* source, const void* data, size_t length)
+ {
+ mesh* that = static_cast<mesh*>(handle);
+ that->receive(static_cast<node*>(source), data, length);
+ }
+
+ static void node_status_trampoline(meshlink_handle_t* handle, meshlink_node_t* peer, bool reachable)
+ {
+ mesh* that = static_cast<mesh*>(handle);
+ that->node_status(static_cast<node*>(peer), reachable);
+ }
+
+ static void log_trampoline(meshlink_handle_t* handle, log_level_t level, const char* message)
+ {
+ mesh* that = static_cast<mesh*>(handle);
+ that->log(level, message);
+ }
};
/// Initialize MeshLink's configuration directory.
*
* @param confbase The directory in which MeshLink will store its configuration files.
* @param name The name which this instance of the application will use in the mesh.
+ * @param appname The application name which will be used in the mesh.
+ * @param dclass The device class which will be used in the mesh.
*
* @return This function will return a pointer to a meshlink::mesh if MeshLink has succesfully set up its configuration files, NULL otherwise.
*/
- static mesh *open(const char *confbase, const char *name) {
- return (mesh *)meshlink_open(confbase, name);
+ template<class MESH>
+ static MESH* open(const char *confbase, const char *name, const char* appname, dev_class_t devclass) {
+ void* mp = (void *)meshlink_open_with_size(confbase, name, appname, devclass, sizeof(MESH));
+ return new (mp) MESH;
}
/// Close the MeshLink handle.
static void close(mesh *mesh) {
meshlink_close(mesh);
}
-};
+
+ static const char *strerror(errno_t err = meshlink_errno) {
+ return meshlink_strerror(err);
+ }
+
+}
#endif // MESHLINKPP_H
projects / meshlink / blobdiff