current_id, registry_id, and ShmPool are atomic

src/main.rs

@@ -8,15 +8,5 @@ mod graphics;
 fn main() -> Result<(), Box<dyn Error>> {
     let mut wl_client = WlClient::new()?;
 
-    wl_client.wl_display_get_registry()?;
-
-    loop {
-        wl_client.read_event()?;
-
-        if false {
-            break
-        }
-    }
-
     Ok(())
 }

src/wayland/layer_shell.rs

@@ -1,4 +1,4 @@
-use std::{error::Error, io::Write};
+use std::{error::Error, io::Write, sync::atomic::Ordering};
 use crate::wayland::{vec_utils::WlMessage, wl_client::WlClient};
 
 const NAMESPACE: &str = "chlorostart";
@@ -19,15 +19,15 @@ impl WlClient {
         request.write_u16(&OPCODE,   &mut offset);
         request.write_u16(&msg_size, &mut offset);
 
-        self.current_id += 1;
+        let current_id = self.current_id.fetch_add(1, Ordering::Relaxed) + 1;
-        request.write_u32(&self.current_id, &mut offset);
+        request.write_u32(&current_id, &mut offset);
-        self.layer_surface_id = Some(self.current_id);
         request.write_u32(&self.surface_id.unwrap(), &mut offset);
         request.write_u32(&output, &mut offset);
         request.write_u32(&OVERLAY, &mut offset);
         request.write_string(&NAMESPACE.to_string(), &mut offset);
 
         self.socket.write(&request)?;
+        self.layer_surface_id = Some(current_id);
 
         Ok(())
     }

src/wayland/shm.rs

@@ -87,3 +87,6 @@ impl Drop for ShmPool {
         unsafe { munmap(self.addr, self.size); }
     }
 }
+
+unsafe impl Send for ShmPool {}
+unsafe impl Sync for ShmPool {}

src/wayland/surface.rs

@@ -1,4 +1,4 @@
-use std::{error::Error, io::Write};
+use std::{error::Error, io::Write, sync::atomic::Ordering};
 
 use crate::wayland::{vec_utils::WlMessage, wl_client::WlClient};
 
@@ -31,12 +31,12 @@ impl WlClient {
         request.write_u16(&OPCODE, &mut offset);
         request.write_u16(&MSG_SIZE, &mut offset);
 
-        self.current_id += 1;
+        let current_id = self.current_id.fetch_add(1, Ordering::Relaxed) + 1;
-        request.write_u32(&self.current_id, &mut offset);
+        request.write_u32(&current_id, &mut offset);
 
         self.socket.write(&request)?;
 
-        self.surface_id = Some(self.current_id);
+        self.surface_id = Some(current_id);
 
         Ok(())
     }

src/wayland/wl_client.rs

@@ -1,4 +1,4 @@
-use std::{env::var, error::Error, fmt::Debug, io::Read, os::unix::net::UnixStream, u32};
+use std::{env::var, error::Error, fmt::Debug, io::Read, os::unix::net::UnixStream, sync::{atomic::{AtomicU32, Ordering}, Arc, Mutex}, thread, u32};
 
 use crate::wayland::shm;
 
@@ -10,10 +10,10 @@ struct WlHeader {
 
 pub struct WlClient {
     pub socket:             UnixStream,
-    pub current_id:         u32,
+    pub current_id:         AtomicU32,
-    pub registry_id:        Option<u32>,
+    pub registry_id:        AtomicU32,
     pub shm_id:             Option<u32>,
-    pub shm_pool:           Option<shm::ShmPool>,
+    pub shm_pool:           Arc<Mutex<Option<shm::ShmPool>>>,
     pub buffer_id:          Option<u32>,
     pub compositor_id:      Option<u32>,
     pub surface_id:         Option<u32>,
@@ -30,12 +30,12 @@ impl WlClient {
             var("WAYLAND_DISPLAY")?
         ))?;
 
-        let res = WlClient {
+        let mut wl_client = WlClient {
             socket:             sock,
-            current_id:         1, 
+            current_id:         AtomicU32::from(1),
-            registry_id:        None,
+            registry_id:        AtomicU32::from(0),
             shm_id:             None,
-            shm_pool:           None,
+            shm_pool:           Arc::new(Mutex::new(None)),
             buffer_id:          None,
             compositor_id:      None,
             surface_id:         None,
@@ -44,7 +44,21 @@ impl WlClient {
             layer_surface_id:   None,
         };
 
-        Ok(res)
+        let shm_pool = wl_client.shm_pool.clone();
+        thread::spawn(move || {
+        }).join();
+
+        wl_client.wl_display_get_registry()?;
+
+        loop {
+            wl_client.read_event()?;
+
+            if false {
+                break
+            }
+        }
+
+        Ok(wl_client)
     }
 
     pub fn read_event(&mut self) -> Result<(), Box<dyn Error>> {
@@ -62,7 +76,7 @@ impl WlClient {
         let mut event = vec![0u8; header.size as usize - 8];
         self.socket.read_exact(&mut event)?;
 
-        if header.object == self.registry_id.unwrap() && header.opcode == 0 { // wl_registry::global
+        if header.object == self.registry_id.load(Ordering::Relaxed) && header.opcode == 0 { // wl_registry::global
             self.wl_registry_global(&event)?;
         }
         else if header.object == 1 && header.opcode == 0 { // wl_display::error
@@ -82,7 +96,6 @@ impl WlClient {
         }
         else if Some(header.object) == self.surface_id && header.opcode == 3 { // wl_surface::preferred_buffer_transform
             println!("Preferred buffer transform: {}", i32::from_ne_bytes(event[0..4].try_into().unwrap()));
-            dbg!(self);
         }
         else {
             println!(
@@ -96,30 +109,3 @@ impl WlClient {
         Ok(())
     }
 }
-
-impl Debug for WlClient {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, 
-"WlClient {{
-    current_id: {},
-    registry_id: {},
-    shm_id: {},
-    buffer_id: {},
-    compositor_id: {},
-    surface_id: {},
-    xdg_wm_base_id: {},
-    layer_shell_id: {},
-    layer_surface_id: {},
-}}",
-            self.current_id,
-            self.registry_id.unwrap_or(0),
-            self.shm_id.unwrap_or(0),
-            self.buffer_id.unwrap_or(0),
-            self.compositor_id.unwrap_or(0),
-            self.surface_id.unwrap_or(0),
-            self.xdg_wm_base_id.unwrap_or(0),
-            self.layer_shell_id.unwrap_or(0),
-            self.layer_surface_id.unwrap_or(0),
-        )    
-    }
-}

src/wayland/wl_registry.rs

@@ -1,5 +1,5 @@
 use crate::wayland::{surface::UnsetErr, vec_utils::WlMessage, wl_client::WlClient};
-use std::{io::Write, error::Error};
+use std::{error::Error, io::Write, sync::atomic::{AtomicU32, Ordering}};
 
 impl WlClient {
     fn init_toplevel(&mut self) -> Result<(), Box<dyn Error>> {
@@ -41,12 +41,11 @@ impl WlClient {
         request.write_u16(&OPCODE,   &mut offset);
         request.write_u16(&MSG_SIZE, &mut offset);
 
-        self.current_id += 1;
+        let current_id = self.current_id.fetch_add(1, Ordering::Relaxed) + 1;
-        request.write_u32(&self.current_id, &mut offset);
+        request.write_u32(&current_id, &mut offset);
-        self.registry_id = Some(self.current_id);
 
-        let written = self.socket.write(&request)?;
+        self.socket.write(&request)?;
-        assert!(written == MSG_SIZE.into());
+        self.registry_id = AtomicU32::from(current_id);
 
         Ok(())
     }
@@ -68,50 +67,50 @@ impl WlClient {
         // TODO: Collapse these into one line (probably using a macro)
 
         if interface == "wl_shm" {
-            self.current_id += 1;
+            let current_id = self.current_id.fetch_add(1, Ordering::Relaxed) + 1;
             self.wl_registry_bind(
                 &name,
                 &interface,
                 &version,
-                &self.current_id.clone()
+                &current_id
             )?;
-            self.shm_id = Some(self.current_id);
+            self.shm_id = Some(current_id);
             self.init_toplevel().unwrap_or_else(|err| {eprintln!("{}", err)});
         }
 
         if interface == "wl_compositor" {
-            self.current_id += 1;
+            let current_id = self.current_id.fetch_add(1, Ordering::Relaxed) + 1;
             self.wl_registry_bind(
                 &name,
                 &interface,
                 &version,
-                &self.current_id.clone()
+                &current_id
             )?;
-            self.compositor_id = Some(self.current_id);
+            self.compositor_id = Some(current_id);
             self.init_toplevel().unwrap_or_else(|err| {eprintln!("{}", err)});
         }
 
         if interface == "xdg_wm_base" {
-            self.current_id += 1;
+            let current_id = self.current_id.fetch_add(1, Ordering::Relaxed) + 1;
             self.wl_registry_bind(
                 &name,
                 &interface,
                 &version,
-                &self.current_id.clone()
+                &current_id
             )?;
-            self.xdg_wm_base_id = Some(self.current_id);
+            self.xdg_wm_base_id = Some(current_id);
             self.init_toplevel().unwrap_or_else(|err| {eprintln!("{}", err)});
         }
 
         if interface == "zwlr_layer_shell_v1" {
-            self.current_id += 1;
+            let current_id = self.current_id.fetch_add(1, Ordering::Relaxed) + 1;
             self.wl_registry_bind(
                 &name,
                 &interface,
                 &version,
-                &self.current_id.clone()
+                &current_id
             )?;
-            self.layer_shell_id = Some(self.current_id);
+            self.layer_shell_id = Some(current_id);
             self.init_toplevel().unwrap_or_else(|err| {eprintln!("{}", err)});
         }
 
@@ -124,11 +123,11 @@ impl WlClient {
         interface: &String,
         version: &u32,
         id: &u32
-    ) -> Result<(), String> {
+    ) -> Result<(), Box<dyn Error>> {
-        let object: u32 = match self.registry_id {
+        let object: u32 = self.registry_id.load(Ordering::Relaxed);
-            Some(id) => id,
+        if object == 0 {
-            None => return Err(String::from("wl_registry_bind failed: wl_state.registry_id not set!"))
+            return Err(UnsetErr("registry_id".to_string()).into());
-        };
+        }
         const OPCODE: u16 = 0;
 
         let req_size: u16 = 24 + ((interface.len() as u16+3) & (u16::MAX-3));
@@ -144,14 +143,7 @@ impl WlClient {
         request.write_u32    (&version,   &mut offset);
         request.write_u32    (&id,        &mut offset);
 
-        match self.socket.write(&request) {
+        self.socket.write(&request)?;
-            Ok(bytes) => {
-                assert!(bytes == req_size as usize)
-            }
-            Err(err) => {
-                return Err(err.to_string());
-            }
-        };
 
         Ok(())
     }

src/wayland/wl_shm.rs

@@ -1,4 +1,4 @@
-use std::{error::Error, io::Write, os::unix::net::SocketAncillary, u8};
+use std::{error::Error, io::Write, os::unix::net::SocketAncillary, sync::atomic::Ordering, u8};
 use crate::wayland::{shm, surface::UnsetErr, vec_utils::WlMessage, wl_client::WlClient};
 
 const STRIDE: usize = 4;
@@ -10,19 +10,20 @@ impl WlClient {
     }
 
     pub fn wl_shm_create_pool(&mut self, width: usize, height: usize) -> Result<(), Box<dyn Error>> {
-        self.current_id += 1;
+        let mut shm_pool = self.shm_pool.lock().unwrap();
-        self.shm_pool = Some(shm::ShmPool::new(width, height, self.current_id)?);
+        let current_id = self.current_id.fetch_add(1, Ordering::Relaxed) + 1;
-        self.shm_pool.as_mut().unwrap().write(&vec![0xffff0000; width * height], 0);
+        *shm_pool = Some(shm::ShmPool::new(width, height, current_id)?);
-        self.shm_pool.as_mut().unwrap().rectangle(50, 50, 50, 50, 0xff00ff00);
+        shm_pool.as_mut().unwrap().write(&vec![0xffff0000; width * height], 0);
-        self.shm_pool.as_mut().unwrap().circle(300, 300, 200, 0xff0000ff);
+        shm_pool.as_mut().unwrap().rectangle(50, 50, 50, 50, 0xff00ff00);
-        self.shm_pool.as_mut().unwrap().rounded_rectangle(450, 400, 60, 40, 16, 0xffffff00);
+        shm_pool.as_mut().unwrap().circle(300, 300, 200, 0xff0000ff);
+        shm_pool.as_mut().unwrap().rounded_rectangle(450, 400, 60, 40, 16, 0xffffff00);
 
         let object = self.shm_id.ok_or(UnsetErr("shm_id".to_string()))?;
         const OPCODE: u16 = 0;
         const REQ_SIZE: u16 = 16;
-        let id          = self.shm_pool.as_ref().unwrap().id;
+        let id          = shm_pool.as_ref().unwrap().id;
-        let fds         = [self.shm_pool.as_ref().unwrap().fd];
+        let fds         = [shm_pool.as_ref().unwrap().fd];
-        let shm_size    = self.shm_pool.as_ref().unwrap().size;
+        let shm_size    = shm_pool.as_ref().unwrap().size;
 
         let mut request = vec![0u8; REQ_SIZE as usize];
         let mut offset: usize = 0;
@@ -57,13 +58,13 @@ impl WlClient {
         width:      u32,
         height:     u32
     ) -> Result<(), Box<dyn Error>> {
-        let object: u32 = self.shm_pool.as_ref().unwrap().id;
+        let object: u32 = self.shm_pool.lock().unwrap().as_ref().unwrap().id;
         const REQ_SIZE: u16 = 32;
         const OPCODE: u16 = 0;
 
         let stride: u32 = width * 4;
-        self.current_id += 1;
+        let current_id = self.current_id.fetch_add(1, Ordering::Relaxed) + 1;
-        let id = self.current_id;
+        let id = current_id;
         let format = 0;
 
         let mut offset: usize = 0;
@@ -82,7 +83,7 @@ impl WlClient {
 
         self.socket.write(&request)?;
 
-        self.buffer_id = Some(self.current_id);
+        self.buffer_id = Some(current_id);
 
         Ok(())
     }