added simple socket server

os.h

@@ -25,4 +25,44 @@ struct OS_Thread {
 
 OS_Thread os_createThread(void *(*entry)(void *ctx), void *ctx);
 
+// ### Network I/O ###
+typedef struct Address Address;
+struct Address;
+
+typedef struct Socket Socket;
+struct Socket;
+
+typedef struct Client Client;
+struct Client {
+    Address *clientAddressData;
+    Socket *socket;
+};
+DefineList(Client, Client);
+
+typedef struct Server Server;
+struct Server {
+    Arena *arena;
+    Address *serverAddressData;
+    uint32 serverPort;
+    Socket *socket;
+    ClientList clients;
+    bool listening;
+};
+
+typedef struct ServerInitInfo ServerInitInfo;
+struct ServerInitInfo {
+    uint16 port;
+    uint32 concurrentClients;
+    uint64 memory;
+};
+
+Server serverInit(ServerInitInfo info);
+void serverListen(Server *s);
+Client *serverAccept(Server *s);
+void serverClose(Server *s);
+
+uint64 clientRead(Client *client, void *dest, size_t bytes);
+void clientWrite(Client *client);
+void clientClose(Client *client);
+
 #endif