Fix pickling error in Numba exception handling & improve cache checks (…

…#1083)

* attempt to fix recursion error (1)

* better checks for caching

* add better check if a numba function is cached or needs to be re-compiled

* add case for non-numba functions

uxarray/__init__.py

@@ -1,9 +1,3 @@
-import uxarray.constants
-import sys
-#
-# # TODO: numba recursion limit ?
-
-
 from .core.api import open_grid, open_dataset, open_mfdataset
 
 from .core.dataset import UxDataset
@@ -25,23 +19,6 @@
     __version__ = "999"
 
 
-# Flag for enabling FMA instructions across the package
-def enable_fma():
-    """Enables Fused-Multiply-Add (FMA) instructions using the ``pyfma``
-    package."""
-    uxarray.constants.ENABLE_FMA = True
-
-
-def disable_fma():
-    """Disable Fused-Multiply-Add (FMA) instructions using the ``pyfma``
-    package."""
-    uxarray.constants.ENABLE_FMA = False
-
-
-disable_fma()
-sys.setrecursionlimit(10000)
-
-
 __all__ = (
     "open_grid",
     "open_dataset",
@@ -55,6 +32,4 @@ def disable_fma():
     "diverging",
     "sequential_blue",
     "sequential_green",
-    "enable_fma",
-    "disable_fma",
 )

uxarray/grid/geometry.py

@@ -827,9 +827,7 @@ def pole_point_inside_polygon(pole, face_edges_xyz, face_edges_lonlat):
         return ((north_intersections + south_intersections) % 2) != 0
 
     else:
-        raise ValueError(
-            f"Invalid pole point query. Current location: {location}, query pole point: {pole}"
-        )
+        raise ValueError("Invalid pole point query.")
 
 
 @njit(cache=True)

uxarray/grid/grid.py

@@ -95,6 +95,8 @@
     _check_normalization,
 )
 
+from uxarray.utils.numba import is_numba_function_cached
+
 
 from uxarray.conventions import ugrid
 
@@ -1367,13 +1369,12 @@ def bounds(self):
         Dimensions ``(n_face", two, two)``
         """
         if "bounds" not in self._ds:
-            if hasattr(compute_temp_latlon_array, "inspect_llvm"):
-                if len(compute_temp_latlon_array.inspect_llvm()) == 0:
-                    warn(
-                        "Necessary functions for computing face bounds are not translated yet with Numba. This initial"
-                        "translation may take some time.",
-                        RuntimeWarning,
-                    )
+            if not is_numba_function_cached(compute_temp_latlon_array):
+                warn(
+                    "Necessary functions for computing the bounds of each face are not yet compiled with Numba. "
+                    "This initial execution will be significantly longer.",
+                    RuntimeWarning,
+                )
 
             _populate_bounds(self)
 

uxarray/utils/numba.py

@@ -0,0 +1,44 @@
+import os
+import pickle
+import numba
+
+
+def is_numba_function_cached(func):
+    """
+    Determines if a numba function is cached and up-to-date.
+
+    Returns:
+        - True if cache exists and is valid or the input is not a Numba function.
+        - False if cache doesn't exist or needs recompilation
+    """
+
+    if not hasattr(func, "_cache"):
+        return True
+
+    cache = func._cache
+    cache_file = cache._cache_file
+
+    # Check if cache file exists
+    full_path = os.path.join(cache._cache_path, cache_file._index_name)
+    if not os.path.isfile(full_path):
+        return False
+
+    try:
+        # Load and check version
+        with open(full_path, "rb") as f:
+            version = pickle.load(f)
+            if version != numba.__version__:
+                return False
+
+            # Load and check source stamp
+            data = f.read()
+            stamp, _ = pickle.loads(data)
+
+            # Get current source stamp
+            current_stamp = cache._impl.locator.get_source_stamp()
+
+            # Compare stamps
+            return stamp == current_stamp
+
+    except (OSError, pickle.PickleError):
+        return False