Sys module: dummy implementation of get/set{recursionlimit|checkinterval|switchinterval}

Author: steve-s

graalpython/com.oracle.graal.python.test/src/tests/unittest_tags/test_sys.txt

@@ -26,6 +26,9 @@
 *graalpython.lib-python.3.test.test_sys.SysModuleTest.test_no_duplicates_in_meta_path
 *graalpython.lib-python.3.test.test_sys.SysModuleTest.test_refcount
 *graalpython.lib-python.3.test.test_sys.SysModuleTest.test_setrecursionlimit_recursion_depth
+*graalpython.lib-python.3.test.test_sys.SysModuleTest.test_recursionlimit
+*graalpython.lib-python.3.test.test_sys.SysModuleTest.test_setcheckinterval
+*graalpython.lib-python.3.test.test_sys.SysModuleTest.test_switchinterval
 *graalpython.lib-python.3.test.test_sys.SysModuleTest.test_sys_getwindowsversion_no_instantiation
 *graalpython.lib-python.3.test.test_sys.SysModuleTest.test_c_locale_surrogateescape
 *graalpython.lib-python.3.test.test_sys.SysModuleTest.test_posix_locale_surrogateescape

graalpython/lib-graalpython/__graalpython__.py

@@ -39,6 +39,14 @@
 
 import sys
 
+class SysState:
+    def __init__(self):
+        self.recursionlimit = 1000
+        self.checkinterval = 100
+        self.switchinterval = 0.005
+
+sys_state = SysState()
+del SysState
 
 @builtin
 def import_current_as_named_module(name, owner_globals=None):

graalpython/lib-graalpython/sys.py

@@ -261,11 +261,41 @@ def breakpointhook(*args, **kws):
 
 __breakpointhook__ = breakpointhook
 
-
 @__graalpython__.builtin
 def getrecursionlimit():
-    return 1000
+    return __graalpython__.sys_state.recursionlimit
+
+@__graalpython__.builtin
+def setrecursionlimit(value):
+    if not isinstance(value, int):
+        raise TypeError("an integer is required")
+    if value <= 0:
+        raise ValueError("recursion limit must be greater or equal than 1")
+    __graalpython__.sys_state.recursionlimit = value
+
+@__graalpython__.builtin
+def getcheckinterval():
+    return __graalpython__.sys_state.checkinterval
 
+@__graalpython__.builtin
+def setcheckinterval(value):
+    import warnings
+    warnings.warn("sys.getcheckinterval() and sys.setcheckinterval() are deprecated. Use sys.setswitchinterval() instead.", DeprecationWarning)
+    if not isinstance(value, int):
+        raise TypeError("an integer is required")
+    __graalpython__.sys_state.checkinterval = value
+
+@__graalpython__.builtin
+def getswitchinterval():
+    return __graalpython__.sys_state.switchinterval
+
+@__graalpython__.builtin
+def setswitchinterval(value):
+    if not isinstance(value, (int, float)):
+        raise TypeError("must be real number, not str")
+    if value <= 0:
+        raise ValueError("switch interval must be strictly positive")
+    __graalpython__.sys_state.switchinterval = value
 
 @__graalpython__.builtin
 def displayhook(value):