threadpool for parallel code generation

nac3core/src/codegen/mod.rs

@@ -6,6 +6,7 @@ use crate::{
         typedef::{FunSignature, Type, TypeEnum, Unifier},
     },
 };
+use crossbeam::channel::{unbounded, Receiver, Sender};
 use inkwell::{
     basic_block::BasicBlock,
     builder::Builder,
@@ -16,9 +17,11 @@ use inkwell::{
     AddressSpace,
 };
 use itertools::Itertools;
+use parking_lot::{Condvar, Mutex};
 use rustpython_parser::ast::Stmt;
 use std::collections::HashMap;
 use std::sync::Arc;
+use std::thread;
 
 mod expr;
 mod stmt;
@@ -43,6 +46,112 @@ pub struct CodeGenContext<'ctx, 'a> {
     pub loop_bb: Option<(BasicBlock<'ctx>, BasicBlock<'ctx>)>,
 }
 
+type Fp = Box<dyn Fn(&Module) + Send + Sync>;
+
+pub struct WithCall {
+    fp: Fp,
+}
+
+impl WithCall {
+    pub fn new(fp: Fp) -> WithCall {
+        WithCall { fp }
+    }
+
+    pub fn run<'ctx>(&self, m: &Module<'ctx>)  {
+        (self.fp)(m)
+    }
+}
+
+pub struct WorkerRegistry {
+    sender: Arc<Sender<Option<CodeGenTask>>>,
+    receiver: Arc<Receiver<Option<CodeGenTask>>>,
+    task_count: Mutex<usize>,
+    thread_count: usize,
+    wait_condvar: Condvar,
+}
+
+impl WorkerRegistry {
+    pub fn create_workers(
+        names: &[&str],
+        top_level_ctx: Arc<TopLevelContext>,
+        f: Arc<WithCall>,
+    ) -> Arc<WorkerRegistry> {
+        let (sender, receiver) = unbounded();
+        let task_count = Mutex::new(0);
+        let wait_condvar = Condvar::new();
+
+        let registry = Arc::new(WorkerRegistry {
+            sender: Arc::new(sender),
+            receiver: Arc::new(receiver),
+            thread_count: names.len(),
+            task_count,
+            wait_condvar,
+        });
+
+        for name in names.iter() {
+            let top_level_ctx = top_level_ctx.clone();
+            let registry = registry.clone();
+            let name = name.to_string();
+            let f = f.clone();
+            thread::spawn(move || {
+                registry.worker_thread(name, top_level_ctx, f);
+            });
+        }
+        registry
+    }
+
+    pub fn wait_tasks_complete(&self) {
+        {
+            let mut count = self.task_count.lock();
+            while *count != 0 {
+                self.wait_condvar.wait(&mut count);
+            }
+        }
+        for _ in 0..self.thread_count {
+            self.sender.send(None).unwrap();
+        }
+        {
+            let mut count = self.task_count.lock();
+            while *count != self.thread_count {
+                self.wait_condvar.wait(&mut count);
+            }
+        }
+    }
+
+    pub fn add_task(&self, task: CodeGenTask) {
+        *self.task_count.lock() += 1;
+        self.sender.send(Some(task)).unwrap();
+    }
+
+    fn worker_thread(
+        &self,
+        module_name: String,
+        top_level_ctx: Arc<TopLevelContext>,
+        f: Arc<WithCall>,
+    ) {
+        let context = Context::create();
+        let mut builder = context.create_builder();
+        let mut module = context.create_module(&module_name);
+
+        while let Some(task) = self.receiver.recv().unwrap() {
+            let result = gen_func(&context, builder, module, task, top_level_ctx.clone());
+            builder = result.0;
+            module = result.1;
+
+            println!("{}", *self.task_count.lock());
+            *self.task_count.lock() -= 1;
+            self.wait_condvar.notify_all();
+        }
+
+        // do whatever...
+        let mut lock = self.task_count.lock();
+        module.verify().unwrap();
+        f.run(&module);
+        *lock += 1;
+        self.wait_condvar.notify_all();
+    }
+}
+
 pub struct CodeGenTask {
     pub subst: Vec<(Type, Type)>,
     pub symbol_name: String,

nac3core/src/codegen/test.rs

@@ -1,5 +1,6 @@
-use super::{gen_func, CodeGenTask};
+use super::{CodeGenTask, WorkerRegistry};
 use crate::{
+    codegen::WithCall,
     location::Location,
     symbol_resolver::{SymbolResolver, SymbolValue},
     top_level::{DefinitionId, TopLevelContext},
@@ -10,7 +11,6 @@ use crate::{
     },
 };
 use indoc::indoc;
-use inkwell::context::Context;
 use parking_lot::RwLock;
 use rustpython_parser::{ast::fold::Fold, parser::parse_program};
 use std::collections::HashMap;
@@ -109,7 +109,7 @@ impl TestEnvironment {
             top_level: TopLevelContext {
                 definitions: Default::default(),
                 unifiers: Default::default(),
-                conetexts: Default::default(),
+                // conetexts: Default::default(),
             },
             function_data: FunctionData {
                 resolver,
@@ -140,10 +140,7 @@ impl TestEnvironment {
 #[test]
 fn test_primitives() {
     let mut env = TestEnvironment::basic_test_env();
-    let context = Context::create();
-    let module = context.create_module("test");
-    let builder = context.create_builder();
-
+    let threads = ["test"];
     let signature = FunSignature {
         args: vec![
             FuncArg { name: "a".to_string(), ty: env.primitives.int32, default_value: None },
@@ -170,9 +167,8 @@ fn test_primitives() {
     let top_level = Arc::new(TopLevelContext {
         definitions: Default::default(),
         unifiers: Arc::new(RwLock::new(vec![(env.unifier.get_shared_unifier(), env.primitives)])),
-        conetexts: Default::default(),
+        // conetexts: Default::default(),
     });
-
     let task = CodeGenTask {
         subst: Default::default(),
         symbol_name: "testing".to_string(),
@@ -182,7 +178,7 @@ fn test_primitives() {
         signature,
     };
 
-    let module = gen_func(&context, builder, module, task, top_level);
+    let f = Arc::new(WithCall::new(Box::new(|module| {
         // the following IR is equivalent to
         // ```
         // ; ModuleID = 'test.ll'
@@ -239,8 +235,9 @@ fn test_primitives() {
            }
        "}
         .trim();
-    let ir = module.1.print_to_string().to_string();
-    println!("src:\n{}", source);
-    println!("IR:\n{}", ir);
-    assert_eq!(expected, ir.trim());
+        assert_eq!(expected, module.print_to_string().to_str().unwrap().trim());
+    })));
+    let registry = WorkerRegistry::create_workers(&threads, top_level, f);
+    registry.add_task(task);
+    registry.wait_tasks_complete();
 }

nac3core/src/top_level.rs

@@ -4,7 +4,6 @@ use std::{collections::HashMap, sync::Arc};
 use super::typecheck::type_inferencer::PrimitiveStore;
 use super::typecheck::typedef::{SharedUnifier, Type, TypeEnum, Unifier};
 use crate::symbol_resolver::SymbolResolver;
-use inkwell::context::Context;
 use parking_lot::{Mutex, RwLock};
 use rustpython_parser::ast::{self, Stmt};
 
@@ -54,7 +53,6 @@ pub enum TopLevelDef {
 pub struct TopLevelContext {
     pub definitions: Arc<RwLock<Vec<RwLock<TopLevelDef>>>>,
     pub unifiers: Arc<RwLock<Vec<(SharedUnifier, PrimitiveStore)>>>,
-    pub conetexts: Arc<RwLock<Vec<Mutex<Context>>>>,
 }
 
 // like adding some info on top of the TopLevelDef for

nac3core/src/typecheck/type_inferencer/test.rs

@@ -100,7 +100,7 @@ impl TestEnvironment {
             top_level: TopLevelContext {
                 definitions: Default::default(),
                 unifiers: Default::default(),
-                conetexts: Default::default(),
+                // conetexts: Default::default(),
             },
             unifier,
             function_data: FunctionData {
@@ -259,7 +259,7 @@ impl TestEnvironment {
         let top_level = TopLevelContext {
             definitions: Arc::new(RwLock::new(top_level_defs)),
             unifiers: Default::default(),
-            conetexts: Default::default(),
+            // conetexts: Default::default(),
         };
 
         let resolver = Arc::new(Resolver {