the beginning of a new interpreter

version3.0/lib/thread.nas

@@ -0,0 +1,17 @@
+# nasal lib thread.nas
+# 2020/2/6
+# this file is used to avoid name confliction
+# and is used to avoid name undefined
+# before running this file will be translated to abstract syntax tree
+# and this ast will be linked before main ast as main-ast's beginning
+
+var thread=
+{
+    newthread:func(){},
+    newlock:func(){},
+    lock:func(){},
+    unlock:func(){},
+    newsem:func(){},
+    semdown:func(){},
+    semup:func(){},
+};