Add working Jai example

Author: rexim

Makefile

@@ -2,7 +2,7 @@ build/counter: examples/counter.c coroutine.h build/coroutine.o
 	gcc -I. -Wall -Wextra -ggdb -o build/counter examples/counter.c build/coroutine.o
 
 .PHONY:
-examples: build/counter build/counter_cpp build/counter_c3 build/echo
+examples: build/counter build/counter_cpp build/counter_c3 build/counter_jai build/echo
 
 build/echo: examples/echo.c3 coroutine.c3 build/coroutine.o
 	cp build/coroutine.o build/echo.coroutine.o # c3c deletes the object files for some reason, so we make a copy to preserve the original
@@ -15,6 +15,12 @@ build/counter_c3: examples/counter.c3 coroutine.c3 build/coroutine.o
 	cp build/coroutine.o build/counter.coroutine.o # c3c deletes the object files for some reason, so we make a copy to preserve the original
 	c3c compile -o build/counter_c3 examples/counter.c3 coroutine.c3 build/counter.coroutine.o
 
+build/counter_jai: examples/counter.jai build/coroutine.so
+	jai-linux examples/counter.jai
+
+build/coroutine.so: coroutine.c
+	gcc -Wall -Wextra -ggdb -shared -fPIC -o build/coroutine.so coroutine.c
+
 build/coroutine.o: coroutine.c coroutine.h
 	mkdir -p build
 	gcc -Wall -Wextra -ggdb -c -o build/coroutine.o coroutine.c

coroutine.c3

@@ -1,4 +1,4 @@
-// coroutine bindings for C3
+// coroutine bindings for C3 (see coroutine.h for the API documentation)
 module coroutine;
 import std::net;
 

examples/.gitignore

@@ -0,0 +1 @@
+.build/

examples/counter.jai

@@ -0,0 +1,40 @@
+#import "Basic";
+
+coroutine :: #library "../build/coroutine";
+coroutine_sleep_read :: (fd: int) #foreign coroutine;
+coroutine_sleep_write :: (fd: int) #foreign coroutine;
+coroutine_wake_up :: (id: int) #foreign coroutine;
+coroutine_init :: () #foreign coroutine;
+coroutine_finish :: () #foreign coroutine;
+coroutine_yield :: () #foreign coroutine;
+coroutine_go :: (f: (*void) #c_call, arg: *void) #foreign coroutine;
+coroutine_id :: () -> int #foreign coroutine;
+coroutine_alive :: () -> int #foreign coroutine;
+
+counter :: (arg: *void) #c_call {
+    push_context {
+        n := cast(int) arg;
+        for 0..n-1 {
+            print("[%] %\n", coroutine_id(), it);
+            coroutine_yield();
+        }
+    }
+}
+
+main :: () {
+    coroutine_init();
+    defer coroutine_finish();
+    coroutine_go(counter, cast(*void) 5);
+    coroutine_go(counter, cast(*void) 10);
+    while coroutine_alive() > 1 {
+        coroutine_yield();
+    }
+}
+
+#run {
+    #import "Compiler";
+    set_build_options_dc(.{
+        output_path = "../build/",
+        output_executable_name = "counter_jai",
+    });
+}