Misc Go interop fixes

.vscode/settings.json

@@ -0,0 +1,7 @@
+{
+    // "go.lintTool": "golint"
+    "go.toolsEnvVars": {
+        "GOOS": "wasip1",
+        "GOARCH": "wasm"
+    }
+}

crates/editor/src/go_builder.rs

@@ -3,8 +3,7 @@ use std::{fs::File, io::Read, path::{Path, PathBuf}, process::Command};
 use viperid::VResult;
 
 pub struct GoBuilder {
-    project_directory: PathBuf,
-    entry_point: PathBuf
+    project_directory: PathBuf
 }
 
 impl GoBuilder {
@@ -27,15 +26,9 @@ impl GoBuilder {
             anyhow::bail!("project directory must exist: {}", project_directory.to_string_lossy())
         }
 
-        let entry_point = project_directory.join("main.go");
-        if !entry_point.exists() {
-            anyhow::bail!("entry point must exist: {}", entry_point.to_string_lossy())
-        }
-
         // OK, we should be able to do things with Go without any errors
         Ok(GoBuilder {
             project_directory: PathBuf::from(project_directory),
-            entry_point
         })
     }
 
@@ -47,24 +40,17 @@ impl GoBuilder {
                 self.project_directory.to_string_lossy()
             );
         }
-        if !self.entry_point.exists() {
-            anyhow::bail!(
-                "entry point disappeared: {}", 
-                self.entry_point.to_string_lossy()
-            );
-        }
 
-        let project_directory = &self.project_directory;
-        let entry_point = &self.entry_point;
-        let build_directory = project_directory.join("build");
+        let build_directory = self.project_directory.join("build");
         let wasm_name = build_directory.join("game.wasm");
 
         let mut child = Command::new("go")
-            .args(["build", "-o"]).arg(&wasm_name)
+            .arg("-C").arg(self.project_directory.clone())
+            .args(["build", "-o"]).arg("build/game.wasm")
             .env("GOOS", "wasip1")
             .env("GOARCH", "wasm")
             .arg("-trimpath")
-            .arg(entry_point)
+            .arg(".")
             .spawn()?;
         let status = child.wait()?;
         if !status.success() {

crates/editor/src/main.rs

@@ -1,6 +1,7 @@
 use std::path::PathBuf;
 
-use viperid::{Device, VResult};
+use player::HOSTED_DEVICE;
+use viperid::VResult;
 
 use crate::go_builder::GoBuilder;
 
@@ -10,11 +11,10 @@ fn main() -> VResult<()> {
     let builder = GoBuilder::new(
         &PathBuf::from("example_project"))?;
     let wasm = builder.build()?;
-    let device = Device::new();
 
-    let mut executor = player::Executor::new(device.share(), &wasm)?;
+    let mut executor = player::Executor::new(&wasm)?;
 
-    minifb_host::host(device, || {
+    minifb_host::host(HOSTED_DEVICE.with(|d| d.share()), || {
         executor.update();
         executor.get_error()?;
         Ok(())

crates/player/src/engine_api.rs

@@ -1,9 +1,9 @@
 use std::fmt::Display;
 
 use viperid::VResult;
-use wasmi::{core::{HostError, Trap}, Caller, Extern, Linker};
+use wasmi::{core::{HostError, Trap}, Caller, Linker};
 
-use crate::executor::ExecutorState;
+use crate::{executor::ExecutorState, HOSTED_DEVICE};
 
 pub(crate) fn integrate(linker: &mut Linker<ExecutorState>) -> VResult<()> {
     linker.func_wrap("viperid", "Pset", pset)?;
@@ -13,14 +13,11 @@ pub(crate) fn integrate(linker: &mut Linker<ExecutorState>) -> VResult<()> {
     Ok(())
 }
 
-fn pset(mut caller: Caller<ExecutorState>, x: i32, y: i32, color: i32) -> Result<(), Trap> {
-    let memory = match caller.get_export("memory") {
-        Some(Extern::Memory(m)) => m,
-        _ => return Err(wasmi::core::Trap::new(String::from("missing required memory export"))),
-    };
-    let(_, ctx) = memory.data_and_store_mut(&mut caller);
-    ctx.device.shared.screen.pset(x, y, (color & 0xff) as u8);
-    Ok(())
+fn pset(mut _caller: Caller<ExecutorState>, x: i32, y: i32, color: i32) -> Result<(), Trap> {
+    HOSTED_DEVICE.with(|dev| {
+        dev.shared.screen.pset(x, y, (color & 0xff) as u8);
+        Ok(())
+    })
 }
 
 fn yield_frame(_caller: Caller<ExecutorState>) -> Result<(), Trap> {

crates/player/src/executor.rs

@@ -1,6 +1,6 @@
 use std::mem;
 
-use viperid::{Device, VResult};
+use viperid::VResult;
 use wasmi::{core::Trap, Engine, Linker, Module, Store, TypedFunc, TypedResumableCall, TypedResumableInvocation};
 
 use crate::{engine_api::{self, YieldFrame}, wasi::{self, StockWasi}};
@@ -12,14 +12,12 @@ pub struct Executor {
 
 pub(crate) struct ExecutorState {
     wasi: wasi::StockWasi,
-    pub(crate) device: Device
 }
 
 impl ExecutorState {
-    fn new(device: Device) -> Self {
+    fn new() -> Self {
         ExecutorState {
             wasi: StockWasi::new(),
-            device
         }
 
     }
@@ -27,12 +25,12 @@ impl ExecutorState {
 
 
 impl Executor { 
-    pub fn new(device: Device, wasm: &[u8]) -> VResult<Self> {
+    pub fn new(wasm: &[u8]) -> VResult<Self> {
         let engine = Engine::default();
 
         let module = Module::new(&engine, wasm)?;
 
-        let mut store = Store::new(&engine, ExecutorState::new(device));
+        let mut store = Store::new(&engine, ExecutorState::new());
 
         let mut linker = <Linker<ExecutorState>>::new(&engine);
         wasi::integrate(&mut linker, |hs| &mut hs.wasi)?;

crates/player/src/hosted_device.rs

@@ -0,0 +1,7 @@
+use std::thread_local;
+
+use viperid::Device;
+
+thread_local! {
+    pub static HOSTED_DEVICE: Device = Device::new();
+}

crates/player/src/lib.rs

@@ -1,5 +1,7 @@
 mod engine_api;
 mod executor;
 mod wasi;
+mod hosted_device;
 
 pub use executor::Executor;
+pub use hosted_device::HOSTED_DEVICE;

crates/player/src/wasi/implementation.rs

@@ -1,5 +1,3 @@
-use std::time::SystemTime;
-
 use wasmi::core::Trap;
 
 use super::MinimalPreview1;

crates/web_runner/src/main.rs

@@ -3,6 +3,7 @@ use std::rc::Rc;
 use error_iter::ErrorIter as _;
 use log::error;
 use pixels::{Pixels, SurfaceTexture};
+use player::HOSTED_DEVICE;
 use viperid::{Device, VResult, SCREEN_H, SCREEN_W};
 // https://github.com/parasyte/pixels/blob/main/examples/minimal-web/src/main.rs
 use winit::{dpi::LogicalSize, event::Event, event_loop::{ControlFlow, EventLoop}, window::WindowBuilder};
@@ -15,12 +16,11 @@ fn main() {
 
 async fn run() {
     let wasm = include_bytes!("../../../example_project/build/game.wasm");
-    let device = Device::new();
     let mut executor = 
-        player::Executor::new(device.share(), wasm)
+        player::Executor::new(wasm)
         .expect("should have been able to create executor");
 
-    host(device, move || {
+    host(HOSTED_DEVICE.with(|d| d.share()), move || {
         executor.update();
         executor.get_error()?;
         Ok(())

example_project/go.work

@@ -1 +1,3 @@
 go 1.21.5
+
+use .

example_project/main.go

@@ -1,14 +1,16 @@
 package main
 
+import "example_project/viperid"
+
 func main() {
 	t := 0
 	for {
 		for y := 0; y < 120; y++ {
 			for x := 0; x < 160; x++ {
-				Pset(
-					int32(x),
-					int32(y),
-					int32((x+y+t)%64),
+				viperid.Pset(
+					x,
+					y,
+					(x+y+t)%64,
 				)
 			}
 		}
@@ -17,15 +19,7 @@ func main() {
 		/*
 			debug.PrintStack()
 		*/
-		YieldFrame()
+		viperid.YieldFrame()
 		t += 1
 	}
 }
-
-//go:wasmimport viperid Pset
-//go:noescape
-func Pset(x int32, y int32, color int32)
-
-//go:wasmimport viperid YieldFrame
-//go:noescape
-func YieldFrame()

example_project/viperid/exports.go

@@ -0,0 +1,13 @@
+package viperid
+
+func YieldFrame() {
+	yieldFrame()
+}
+
+func Pset(x int, y int, color int) {
+	pset(int32(x), int32(y), int32(color))
+}
+
+func Pget(x int, y int) int {
+	return int(pget(int32(x), int32(y)))
+}

example_project/viperid/imports.go

@@ -0,0 +1,15 @@
+//lint:file-ignore U1000 Ignore all unused code, it's generated
+
+package viperid
+
+//go:wasmimport viperid YieldFrame
+//go:noescape
+func yieldFrame()
+
+//go:wasmimport viperid Pset
+//go:noescape
+func pset(x int32, y int32, color int32)
+
+//go:wasmimport viperid Pget
+//go:noescape
+func pget(x int32, y int32) int32