Revert "nac3core/artiq: implement Kernel annotation" and "nac3artiq: add kernel only annotation demo"

This reverts commit 6d65ee90e8 and d269e429d0

nac3artiq/demo/kernel_only_demo.py

@@ -1,73 +0,0 @@
-from min_artiq import *
-from numpy import int32
-
-@nac3
-class Base:
-    c: Kernel[int32]
-    def __init__(self):
-        self.c = 4
-        self.a = 3
-        self.a = 5
-
-@nac3
-class D:
-    da: KernelInvariant[int32]
-    def __init__(self):
-        self.da = 321
-
-@nac3
-class C:
-    ca: KernelInvariant[int32]
-    cb: KernelInvariant[D]
-    def __init__(self, d: D):
-        self.ca = 123
-        self.cb = d
-
-@nac3
-class A(Base):
-    core: KernelInvariant[Core]
-    led0: KernelInvariant[TTLOut]
-    led1: KernelInvariant[TTLOut]
-    d: Kernel[bool]
-    cc: Kernel[C]
-
-    def __init__(self, c):
-        super().__init__()
-        self.core = Core()
-        self.led0 = TTLOut(self.core, 18)
-        self.led1 = TTLOut(self.core, 19)
-        self.b = 3
-        self.d = False
-        self.cc = c
-    
-    @kernel
-    def run(self):
-        print_int32(self.cc.cb.da)
-
-
-if __name__ == '__main__':
-    d = D()
-    print(d.da)
-    c = C(d)
-    print(d.da)
-    print(c.cb.da)
-    
-    a = A(c)
-    print(a.a)
-    print(a.b)
-    # print(c.ca) # fail
-    # print(c.cb.da) # fail
-    
-    a.run()
-
-    # d = D() # redefine, ok
-    # c = C(d) # redefine, ok
-
-    # print(a.c) # fail
-    # a.c = 2 # fail
-    # a.d = 1 # fail
-    # a.cc = 1 # fail
-    # c.ca = 1 # fail
-    # c.cb = 1 # fail
-    # c.cb.da = 1 # fail
-    # d.da = 1 # fail

nac3artiq/demo/min_artiq.py

@@ -1,15 +1,15 @@
-from inspect import getfullargspec, isclass, getmro
+from inspect import getfullargspec
 from functools import wraps
 from types import SimpleNamespace
 from numpy import int32, int64
-from typing import Generic, TypeVar, get_origin
+from typing import Generic, TypeVar
 from math import floor, ceil
 
 import nac3artiq
 
 
 __all__ = [
-    "KernelInvariant", "Kernel", "virtual",
+    "KernelInvariant", "virtual",
     "round64", "floor64", "ceil64",
     "extern", "kernel", "portable", "nac3",
     "ms", "us", "ns",
@@ -24,13 +24,11 @@ T = TypeVar('T')
 class KernelInvariant(Generic[T]):
     pass
 
-class Kernel(Generic[T]):
-    pass
-
 # The virtual class must exist before nac3artiq.NAC3 is created.
 class virtual(Generic[T]):
     pass
 
+
 def round64(x):
     return round(x)
 
@@ -46,7 +44,6 @@ core_arguments = device_db.device_db["core"]["arguments"]
 
 compiler = nac3artiq.NAC3(core_arguments["target"])
 allow_registration = True
-allow_kernel_read = False
 # Delay NAC3 analysis until all referenced variables are supposed to exist on the CPython side.
 registered_functions = set()
 registered_classes = set()
@@ -93,65 +90,7 @@ def nac3(cls):
     Decorates a class to be analyzed by NAC3.
     All classes containing kernels or portable methods must use this decorator.
     """
-    
-    # python does not allow setting magic method on specific instances 
-    # (https://docs.python.org/3/reference/datamodel.html#special-method-lookup).
-    # use this set to keep track of those custom class instances that are
-    # assigned to the `Kernel` fields of a class
-    cls.__nac3_kernel_only_instances__ = set()
-
-    def apply_kernel_only_constraints(val):
-        kernel_only_set = getattr(type(val), '__nac3_kernel_only_instances__', None)
-        if kernel_only_set is None:
-            return
-        else:
-            for (_, attr_val) in val.__dict__.items():
-                if not (attr_val == val):
-                    apply_kernel_only_constraints(attr_val)
-            kernel_only_set.add(val)
-
-    if not isclass(cls):
-        raise ValueError("nac3 annotation decorator should only be applied to classes")
-    if not cls.__setattr__ in {base.__setattr__ for base in cls.__bases__}:
-        raise ValueError("custom __setattr__ is not supported in kernel classes")
-    
     register_class(cls)
-
-    immutable_fields = {
-        n for b in getmro(cls)
-            for (n, ty) in b.__dict__.get('__annotations__', {}).items() if get_origin(ty) == Kernel
-    }
-    def __setattr__(obj, key, value):
-        if obj in type(obj).__nac3_kernel_only_instances__:
-            raise TypeError("attempting to write to kernel only variable")
-        # should allow init to set value, if no attribute then allow to set attr, then
-        # recursively apply constraint to all the fields of that specific object,
-        # regardless of whether they are marked with `Kernel` or not
-        if key in immutable_fields:
-            if hasattr(obj, key):
-                raise TypeError("attempting to write to kernel only variable")
-            else:
-                apply_kernel_only_constraints(value)
-        object.__setattr__(obj, key, value)
-
-    def __getattribute__(obj, key):        
-        # need to use `object.__getattribute__` to get attr before checking
-        # the key in immutable_fields for `__init__`.
-        # since that in `__init__` when setting a instance variable like `self.a = 3`
-        # the sequence of internal magic call is still calling cls.__getattribute__(self, 'a')
-        # first, and if only "AttributeError" is raised, it will then call `__setattr__`
-        # if we raise `TypeError` too early, python will just halt at this `TypeError`.
-        attr = object.__getattribute__(obj, key)
-        if not allow_kernel_read:
-            if obj in type(obj).__nac3_kernel_only_instances__:
-                raise TypeError("attempting to read kernel only variable")
-            if key in immutable_fields:
-                raise TypeError("attempting to read kernel only variable")
-        return attr
-    
-    cls.__setattr__ = __setattr__
-    cls.__getattribute__ = __getattribute__
-
     return cls
 
 
@@ -203,7 +142,6 @@ class Core:
         self.ref_period = core_arguments["ref_period"]
 
     def run(self, method, *args, **kwargs):
-        global allow_kernel_read
         global allow_registration
         if allow_registration:
             compiler.analyze(registered_functions, registered_classes)
@@ -215,9 +153,8 @@ class Core:
         else:
             obj = method
             name = ""
-        allow_kernel_read = True
+
         compiler.compile_method_to_file(obj, name, args, "module.elf")
-        allow_kernel_read = False
 
     @kernel
     def reset(self):

nac3core/src/toplevel/composer.rs

@@ -1058,27 +1058,20 @@ impl TopLevelComposer {
                             let dummy_field_type = unifier.get_fresh_var().0;
 
                             // handle Kernel[T], KernelInvariant[T]
-                            let (annotation, mutable) = match &annotation.node {
+                            let (annotation, mutable) = {
-                                ast::ExprKind::Subscript { value, slice, .. }
+                                let mut result = None;
-                                    if matches!(&value.node, ast::ExprKind::Name { id, .. } if id == &"Kernel".into()) =>
+                                if let ast::ExprKind::Subscript { value, slice, .. } = &annotation.as_ref().node {
-                                {
+                                    if let ast::ExprKind::Name { id, .. } = &value.node {
-                                    match &slice.node {
+                                        result = if id == &"Kernel".into() {
-                                        ast::ExprKind::Subscript { value, .. }
+                                            Some((slice, true))
-                                            if matches!(&value.node, ast::ExprKind::Name { id, .. } if id == &"list".into()) =>
+                                        } else if id == &"KernelInvariant".into() {
-                                        {
+                                            Some((slice, false))
-                                            return Err(format!("list is not allowed to be `Kernel` at {}", value.location))
+                                        } else {
+                                            None
                                         }
-                                        _ => (slice, true)
                                     }
                                 }
-                                ast::ExprKind::Subscript { value, slice, .. }
+                                result.unwrap_or((annotation, true))
-                                    if matches!(&value.node, ast::ExprKind::Name { id, .. } if id == &"KernelInvariant".into()) => {
-                                    (slice, false)
-                                }
-                                _ => {
-                                    eprintln!("attributes not annotated with `Kernel` or `KernelInvariants` at {}", &annotation.location);
-                                    (annotation, true)
-                                }
                             };
                             class_fields_def.push((*attr, dummy_field_type, mutable));