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vm/src/sys/mod.rs

@@ -152,11 +152,12 @@ impl SysState
     {
         let mut syscalls = HashMap::<String, SysCallFn>::new();
 
+        // Core VM syscalls
+        self.reg_syscall(VM_HEAP_SIZE, SysCallFn::Fn0_1(vm_heap_size));
+        self.reg_syscall(VM_RESIZE_HEAP, SysCallFn::Fn1_1(vm_resize_heap));
         self.reg_syscall(MEMSET, SysCallFn::Fn3_0(memset));
         self.reg_syscall(MEMSET32, SysCallFn::Fn3_0(memset32));
         self.reg_syscall(MEMCPY, SysCallFn::Fn3_0(memcpy));
-        self.reg_syscall(VM_HEAP_SIZE, SysCallFn::Fn0_1(vm_heap_size));
-        self.reg_syscall(VM_RESIZE_HEAP, SysCallFn::Fn1_1(vm_resize_heap));
 
         self.reg_syscall(PRINT_I64, SysCallFn::Fn1_0(print_i64));
         self.reg_syscall(PRINT_F32, SysCallFn::Fn1_0(print_f32));
@@ -177,6 +178,8 @@ impl SysState
         self.reg_syscall(WINDOW_ON_TEXTINPUT, SysCallFn::Fn2_0(window_on_textinput));
 
         self.reg_syscall(AUDIO_OPEN_OUTPUT, SysCallFn::Fn4_1(audio_open_output));
+
+        // TODO: NET_, networking syscalls
     }
 }
 

vm/src/sys/net.rs

@@ -1,8 +1,15 @@
 use std::net::{TcpListener, TcpStream};
+use std::io::{self, Read};
 use crate::vm::{VM, Value};
 
 
 
+// We could create a thread for the listening socket that accepts connections,
+// and so simply use this socket in blocking mode
+
+// However, for individual TCP streams, how do we poll?
+// We could use the polling crate: https://crates.io/crates/polling
+
 
 
 /*
@@ -28,3 +35,27 @@ fn main() -> std::io::Result<()> {
 }
 */
 
+
+
+
+
+// Non-blocking read from a TCP stream
+/*
+let mut stream = TcpStream::connect("127.0.0.1:7878")
+    .expect("Couldn't connect to the server...");
+stream.set_nonblocking(true).expect("set_nonblocking call failed");
+
+let mut buf = vec![];
+loop {
+    match stream.read_to_end(&mut buf) {
+        Ok(_) => break,
+        Err(ref e) if e.kind() == io::ErrorKind::WouldBlock => {
+            // wait until network socket is ready, typically implemented
+            // via platform-specific APIs such as epoll or IOCP
+            wait_for_fd();
+        }
+        Err(e) => panic!("encountered IO error: {e}"),
+    };
+};
+println!("bytes: {buf:?}");
+*/