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runtime.cs
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2852 lines (2189 loc) · 151 KB
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using System;
using System.Diagnostics;
using System.Diagnostics.Contracts;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Collections.Generic;
using Python.Runtime.Native;
using Python.Runtime.Platform;
using System.Linq;
using static System.FormattableString;
namespace Python.Runtime
{
/// <summary>
/// Encapsulates the low-level Python C API. Note that it is
/// the responsibility of the caller to have acquired the GIL
/// before calling any of these methods.
/// </summary>
public unsafe class Runtime
{
public static string PythonDLL
{
get => _PythonDll;
set
{
if (_isInitialized)
throw new InvalidOperationException("This property must be set before runtime is initialized");
_PythonDll = value;
}
}
static string _PythonDll = GetDefaultDllName();
private static string GetDefaultDllName()
{
string dll = Environment.GetEnvironmentVariable("PYTHONNET_PYDLL");
if (dll is not null) return dll;
try
{
LibraryLoader.Instance.GetFunction(IntPtr.Zero, "PyUnicode_GetMax");
return null;
} catch (MissingMethodException) { }
string verString = Environment.GetEnvironmentVariable("PYTHONNET_PYVER");
if (!Version.TryParse(verString, out var version)) return null;
return GetDefaultDllName(version);
}
private static string GetDefaultDllName(Version version)
{
string prefix = RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? "" : "lib";
string suffix = RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
? Invariant($"{version.Major}{version.Minor}")
: Invariant($"{version.Major}.{version.Minor}");
string ext = RuntimeInformation.IsOSPlatform(OSPlatform.Windows) ? ".dll"
: RuntimeInformation.IsOSPlatform(OSPlatform.OSX) ? ".dylib"
: ".so";
return prefix + "python" + suffix + ext;
}
// set to true when python is finalizing
internal static object IsFinalizingLock = new object();
internal static bool IsFinalizing;
private static bool _isInitialized = false;
internal static readonly bool Is32Bit = IntPtr.Size == 4;
// .NET core: System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(OSPlatform.Windows)
internal static bool IsWindows = Environment.OSVersion.Platform == PlatformID.Win32NT;
internal static Version InteropVersion { get; }
= System.Reflection.Assembly.GetExecutingAssembly().GetName().Version;
public static int MainManagedThreadId { get; private set; }
public static ShutdownMode ShutdownMode { get; internal set; }
private static PyReferenceCollection _pyRefs = new PyReferenceCollection();
internal static Version PyVersion
{
get
{
using (var versionTuple = new PyTuple(PySys_GetObject("version_info")))
{
var major = Converter.ToInt32(versionTuple[0].Reference);
var minor = Converter.ToInt32(versionTuple[1].Reference);
var micro = Converter.ToInt32(versionTuple[2].Reference);
return new Version(major, minor, micro);
}
}
}
/// <summary>
/// Initialize the runtime...
/// </summary>
/// <remarks>Always call this method from the Main thread. After the
/// first call to this method, the main thread has acquired the GIL.</remarks>
internal static void Initialize(bool initSigs = false, ShutdownMode mode = ShutdownMode.Default)
{
if (_isInitialized)
{
return;
}
_isInitialized = true;
if (mode == ShutdownMode.Default)
{
mode = GetDefaultShutdownMode();
}
ShutdownMode = mode;
if (Py_IsInitialized() == 0)
{
Py_InitializeEx(initSigs ? 1 : 0);
if (PyEval_ThreadsInitialized() == 0)
{
PyEval_InitThreads();
}
// XXX: Reload mode may reduct to Soft mode,
// so even on Reload mode it still needs to save the RuntimeState
if (mode == ShutdownMode.Soft || mode == ShutdownMode.Reload)
{
RuntimeState.Save();
}
}
else
{
// If we're coming back from a domain reload or a soft shutdown,
// we have previously released the thread state. Restore the main
// thread state here.
if (mode != ShutdownMode.Extension)
{
PyGILState_Ensure();
}
}
MainManagedThreadId = Thread.CurrentThread.ManagedThreadId;
IsFinalizing = false;
InternString.Initialize();
InitPyMembers();
ABI.Initialize(PyVersion,
pyType: new BorrowedReference(PyTypeType));
GenericUtil.Reset();
PyScopeManager.Reset();
ClassManager.Reset();
ClassDerivedObject.Reset();
TypeManager.Initialize();
// Initialize modules that depend on the runtime class.
AssemblyManager.Initialize();
OperatorMethod.Initialize();
if (mode == ShutdownMode.Reload && RuntimeData.HasStashData())
{
RuntimeData.RestoreRuntimeData();
}
else
{
PyCLRMetaType = MetaType.Initialize(); // Steal a reference
ImportHook.Initialize();
}
Exceptions.Initialize();
// Need to add the runtime directory to sys.path so that we
// can find built-in assemblies like System.Data, et. al.
string rtdir = RuntimeEnvironment.GetRuntimeDirectory();
IntPtr path = PySys_GetObject("path").DangerousGetAddress();
IntPtr item = PyString_FromString(rtdir);
if (PySequence_Contains(path, item) == 0)
{
PyList_Append(new BorrowedReference(path), item);
}
XDecref(item);
AssemblyManager.UpdatePath();
}
private static void InitPyMembers()
{
IntPtr op;
{
var builtins = GetBuiltins();
SetPyMember(ref PyNotImplemented, PyObject_GetAttrString(builtins, "NotImplemented"),
() => PyNotImplemented = IntPtr.Zero);
SetPyMember(ref PyBaseObjectType, PyObject_GetAttrString(builtins, "object"),
() => PyBaseObjectType = IntPtr.Zero);
SetPyMember(ref PyNone, PyObject_GetAttrString(builtins, "None"),
() => PyNone = IntPtr.Zero);
SetPyMember(ref PyTrue, PyObject_GetAttrString(builtins, "True"),
() => PyTrue = IntPtr.Zero);
SetPyMember(ref PyFalse, PyObject_GetAttrString(builtins, "False"),
() => PyFalse = IntPtr.Zero);
SetPyMemberTypeOf(ref PyBoolType, PyTrue,
() => PyBoolType = IntPtr.Zero);
SetPyMemberTypeOf(ref PyNoneType, PyNone,
() => PyNoneType = IntPtr.Zero);
SetPyMemberTypeOf(ref PyTypeType, PyNoneType,
() => PyTypeType = IntPtr.Zero);
op = PyObject_GetAttrString(builtins, "len");
SetPyMemberTypeOf(ref PyMethodType, op,
() => PyMethodType = IntPtr.Zero);
XDecref(op);
// For some arcane reason, builtins.__dict__.__setitem__ is *not*
// a wrapper_descriptor, even though dict.__setitem__ is.
//
// object.__init__ seems safe, though.
op = PyObject_GetAttr(PyBaseObjectType, PyIdentifier.__init__);
SetPyMemberTypeOf(ref PyWrapperDescriptorType, op,
() => PyWrapperDescriptorType = IntPtr.Zero);
XDecref(op);
SetPyMember(ref PySuper_Type, PyObject_GetAttrString(builtins, "super"),
() => PySuper_Type = IntPtr.Zero);
XDecref(builtins);
}
op = PyString_FromString("string");
SetPyMemberTypeOf(ref PyStringType, op,
() => PyStringType = IntPtr.Zero);
XDecref(op);
op = PyUnicode_FromString("unicode");
SetPyMemberTypeOf(ref PyUnicodeType, op,
() => PyUnicodeType = IntPtr.Zero);
XDecref(op);
op = EmptyPyBytes();
SetPyMemberTypeOf(ref PyBytesType, op,
() => PyBytesType = IntPtr.Zero);
XDecref(op);
op = PyTuple_New(0);
SetPyMemberTypeOf(ref PyTupleType, op,
() => PyTupleType = IntPtr.Zero);
XDecref(op);
op = PyList_New(0);
SetPyMemberTypeOf(ref PyListType, op,
() => PyListType = IntPtr.Zero);
XDecref(op);
op = PyDict_New();
SetPyMemberTypeOf(ref PyDictType, op,
() => PyDictType = IntPtr.Zero);
XDecref(op);
op = PyInt_FromInt32(0);
SetPyMemberTypeOf(ref PyIntType, op,
() => PyIntType = IntPtr.Zero);
XDecref(op);
op = PyLong_FromLong(0);
SetPyMemberTypeOf(ref PyLongType, op,
() => PyLongType = IntPtr.Zero);
XDecref(op);
op = PyFloat_FromDouble(0);
SetPyMemberTypeOf(ref PyFloatType, op,
() => PyFloatType = IntPtr.Zero);
XDecref(op);
PyClassType = IntPtr.Zero;
PyInstanceType = IntPtr.Zero;
Error = new IntPtr(-1);
_PyObject_NextNotImplemented = Get_PyObject_NextNotImplemented();
{
using var sys = PyImport_ImportModule("sys");
SetPyMemberTypeOf(ref PyModuleType, sys.DangerousGetAddress(),
() => PyModuleType = IntPtr.Zero);
}
}
private static IntPtr Get_PyObject_NextNotImplemented()
{
IntPtr pyType = SlotHelper.CreateObjectType();
IntPtr iternext = Marshal.ReadIntPtr(pyType, TypeOffset.tp_iternext);
Runtime.XDecref(pyType);
return iternext;
}
/// <summary>
/// Tries to downgrade the shutdown mode, if possible.
/// The only possibles downgrades are:
/// Soft -> Normal
/// Reload -> Soft
/// Reload -> Normal
/// </summary>
/// <param name="mode">The desired shutdown mode</param>
/// <returns>The `mode` parameter if the downgrade is supported, the ShutdownMode
/// set at initialization otherwise.</returns>
static ShutdownMode TryDowngradeShutdown(ShutdownMode mode)
{
if (
mode == Runtime.ShutdownMode
|| mode == ShutdownMode.Normal
|| (mode == ShutdownMode.Soft && Runtime.ShutdownMode == ShutdownMode.Reload)
)
{
return mode;
}
else // we can't downgrade
{
return Runtime.ShutdownMode;
}
}
internal static void Shutdown(ShutdownMode mode)
{
if (Py_IsInitialized() == 0 || !_isInitialized)
{
return;
}
_isInitialized = false;
// If the shutdown mode specified is not the the same as the one specified
// during Initialization, we need to validate it; we can only downgrade,
// not upgrade the shutdown mode.
mode = TryDowngradeShutdown(mode);
var state = PyGILState_Ensure();
if (mode == ShutdownMode.Soft)
{
RunExitFuncs();
}
if (mode == ShutdownMode.Reload)
{
RuntimeData.Stash();
}
AssemblyManager.Shutdown();
OperatorMethod.Shutdown();
ImportHook.Shutdown();
ClearClrModules();
RemoveClrRootModule();
MoveClrInstancesOnwershipToPython();
ClassManager.DisposePythonWrappersForClrTypes();
TypeManager.RemoveTypes();
MetaType.Release();
PyCLRMetaType = IntPtr.Zero;
Exceptions.Shutdown();
Finalizer.Shutdown();
InternString.Shutdown();
if (mode != ShutdownMode.Normal && mode != ShutdownMode.Extension)
{
PyGC_Collect();
if (mode == ShutdownMode.Soft)
{
RuntimeState.Restore();
}
ResetPyMembers();
GC.Collect();
try
{
GC.WaitForFullGCComplete();
}
catch (NotImplementedException)
{
// Some clr runtime didn't implement GC.WaitForFullGCComplete yet.
}
GC.WaitForPendingFinalizers();
PyGILState_Release(state);
// Then release the GIL for good, if there is somehting to release
// Use the unchecked version as the checked version calls `abort()`
// if the current state is NULL.
if (_PyThreadState_UncheckedGet() != IntPtr.Zero)
{
PyEval_SaveThread();
}
}
else
{
ResetPyMembers();
if (mode != ShutdownMode.Extension)
{
Py_Finalize();
}
}
}
internal static void Shutdown()
{
var mode = ShutdownMode;
Shutdown(mode);
}
internal static ShutdownMode GetDefaultShutdownMode()
{
string modeEvn = Environment.GetEnvironmentVariable("PYTHONNET_SHUTDOWN_MODE");
if (modeEvn == null)
{
return ShutdownMode.Normal;
}
ShutdownMode mode;
if (Enum.TryParse(modeEvn, true, out mode))
{
return mode;
}
return ShutdownMode.Normal;
}
private static void RunExitFuncs()
{
PyObject atexit;
try
{
atexit = Py.Import("atexit");
}
catch (PythonException e)
{
if (!e.IsMatches(Exceptions.ImportError))
{
throw;
}
e.Dispose();
// The runtime may not provided `atexit` module.
return;
}
using (atexit)
{
try
{
atexit.InvokeMethod("_run_exitfuncs").Dispose();
}
catch (PythonException e)
{
Console.Error.WriteLine(e);
e.Dispose();
}
}
}
private static void SetPyMember(ref IntPtr obj, IntPtr value, Action onRelease)
{
// XXX: For current usages, value should not be null.
PythonException.ThrowIfIsNull(value);
obj = value;
_pyRefs.Add(value, onRelease);
}
private static void SetPyMemberTypeOf(ref IntPtr obj, IntPtr value, Action onRelease)
{
var type = PyObject_Type(new BorrowedReference(value)).DangerousMoveToPointer();
SetPyMember(ref obj, type, onRelease);
}
private static void ResetPyMembers()
{
_pyRefs.Release();
}
private static void ClearClrModules()
{
var modules = PyImport_GetModuleDict();
var items = PyDict_Items(modules);
long length = PyList_Size(items);
for (long i = 0; i < length; i++)
{
var item = PyList_GetItem(items, i);
var name = PyTuple_GetItem(item, 0);
var module = PyTuple_GetItem(item, 1);
if (ManagedType.IsInstanceOfManagedType(module))
{
PyDict_DelItem(modules, name);
}
}
items.Dispose();
}
private static void RemoveClrRootModule()
{
var modules = PyImport_GetModuleDict();
PyDictTryDelItem(modules, "clr");
PyDictTryDelItem(modules, "clr._extra");
}
private static void PyDictTryDelItem(BorrowedReference dict, string key)
{
if (PyDict_DelItemString(dict, key) == 0)
{
return;
}
if (!PythonException.Matches(Exceptions.KeyError))
{
throw new PythonException();
}
PyErr_Clear();
}
private static void MoveClrInstancesOnwershipToPython()
{
var objs = ManagedType.GetManagedObjects();
var copyObjs = objs.ToArray();
foreach (var entry in copyObjs)
{
ManagedType obj = entry.Key;
if (!objs.ContainsKey(obj))
{
System.Diagnostics.Debug.Assert(obj.gcHandle == default);
continue;
}
if (entry.Value == ManagedType.TrackTypes.Extension)
{
obj.CallTypeClear();
// obj's tp_type will degenerate to a pure Python type after TypeManager.RemoveTypes(),
// thus just be safe to give it back to GC chain.
if (!_PyObject_GC_IS_TRACKED(obj.ObjectReference))
{
PyObject_GC_Track(obj.pyHandle);
}
}
if (obj.gcHandle.IsAllocated)
{
obj.gcHandle.Free();
ManagedType.SetGCHandle(obj.ObjectReference, default);
}
obj.gcHandle = default;
}
ManagedType.ClearTrackedObjects();
}
internal static IntPtr PyBaseObjectType;
internal static IntPtr PyModuleType;
internal static IntPtr PyClassType;
internal static IntPtr PyInstanceType;
internal static IntPtr PySuper_Type;
internal static IntPtr PyCLRMetaType;
internal static IntPtr PyMethodType;
internal static IntPtr PyWrapperDescriptorType;
internal static IntPtr PyUnicodeType;
internal static IntPtr PyStringType;
internal static IntPtr PyTupleType;
internal static IntPtr PyListType;
internal static IntPtr PyDictType;
internal static IntPtr PyIntType;
internal static IntPtr PyLongType;
internal static IntPtr PyFloatType;
internal static IntPtr PyBoolType;
internal static IntPtr PyNoneType;
internal static IntPtr PyTypeType;
internal static IntPtr Py_NoSiteFlag;
internal static IntPtr PyBytesType;
internal static IntPtr _PyObject_NextNotImplemented;
internal static IntPtr PyNotImplemented;
internal const int Py_LT = 0;
internal const int Py_LE = 1;
internal const int Py_EQ = 2;
internal const int Py_NE = 3;
internal const int Py_GT = 4;
internal const int Py_GE = 5;
internal static IntPtr PyTrue;
internal static IntPtr PyFalse;
internal static IntPtr PyNone;
internal static IntPtr Error;
internal static BorrowedReference CLRMetaType => new BorrowedReference(PyCLRMetaType);
public static PyObject None
{
get
{
var none = Runtime.PyNone;
Runtime.XIncref(none);
return new PyObject(none);
}
}
/// <summary>
/// Check if any Python Exceptions occurred.
/// If any exist throw new PythonException.
/// </summary>
/// <remarks>
/// Can be used instead of `obj == IntPtr.Zero` for example.
/// </remarks>
internal static void CheckExceptionOccurred()
{
if (PyErr_Occurred() != IntPtr.Zero)
{
throw new PythonException();
}
}
internal static IntPtr ExtendTuple(IntPtr t, params IntPtr[] args)
{
var size = PyTuple_Size(t);
int add = args.Length;
IntPtr item;
IntPtr items = PyTuple_New(size + add);
for (var i = 0; i < size; i++)
{
item = PyTuple_GetItem(t, i);
XIncref(item);
PyTuple_SetItem(items, i, item);
}
for (var n = 0; n < add; n++)
{
item = args[n];
XIncref(item);
PyTuple_SetItem(items, size + n, item);
}
return items;
}
internal static Type[] PythonArgsToTypeArray(IntPtr arg)
{
return PythonArgsToTypeArray(arg, false);
}
internal static Type[] PythonArgsToTypeArray(IntPtr arg, bool mangleObjects)
{
// Given a PyObject * that is either a single type object or a
// tuple of (managed or unmanaged) type objects, return a Type[]
// containing the CLR Type objects that map to those types.
IntPtr args = arg;
var free = false;
if (!PyTuple_Check(arg))
{
args = PyTuple_New(1);
XIncref(arg);
PyTuple_SetItem(args, 0, arg);
free = true;
}
var n = PyTuple_Size(args);
var types = new Type[n];
Type t = null;
for (var i = 0; i < n; i++)
{
IntPtr op = PyTuple_GetItem(args, i);
if (mangleObjects && (!PyType_Check(op)))
{
op = PyObject_TYPE(op);
}
ManagedType mt = ManagedType.GetManagedObject(op);
if (mt is ClassBase)
{
MaybeType _type = ((ClassBase)mt).type;
t = _type.Valid ? _type.Value : null;
}
else if (mt is CLRObject)
{
object inst = ((CLRObject)mt).inst;
if (inst is Type)
{
t = inst as Type;
}
}
else
{
t = Converter.GetTypeByAlias(op);
}
if (t == null)
{
types = null;
break;
}
types[i] = t;
}
if (free)
{
XDecref(args);
}
return types;
}
/// <summary>
/// Managed exports of the Python C API. Where appropriate, we do
/// some optimization to avoid managed <--> unmanaged transitions
/// (mostly for heavily used methods).
/// </summary>
internal static unsafe void XIncref(IntPtr op)
{
#if !CUSTOM_INCDEC_REF
Py_IncRef(op);
return;
#else
var p = (void*)op;
if ((void*)0 != p)
{
if (Is32Bit)
{
(*(int*)p)++;
}
else
{
(*(long*)p)++;
}
}
#endif
}
/// <summary>
/// Increase Python's ref counter for the given object, and get the object back.
/// </summary>
internal static IntPtr SelfIncRef(IntPtr op)
{
XIncref(op);
return op;
}
internal static unsafe void XDecref(IntPtr op)
{
#if !CUSTOM_INCDEC_REF
Py_DecRef(op);
return;
#else
var p = (void*)op;
if ((void*)0 != p)
{
if (Is32Bit)
{
--(*(int*)p);
}
else
{
--(*(long*)p);
}
if ((*(int*)p) == 0)
{
// PyObject_HEAD: struct _typeobject *ob_type
void* t = Is32Bit
? (void*)(*((uint*)p + 1))
: (void*)(*((ulong*)p + 1));
// PyTypeObject: destructor tp_dealloc
void* f = Is32Bit
? (void*)(*((uint*)t + 6))
: (void*)(*((ulong*)t + 6));
if ((void*)0 == f)
{
return;
}
NativeCall.Void_Call_1(new IntPtr(f), op);
}
}
#endif
}
[Pure]
internal static unsafe long Refcount(IntPtr op)
{
if (op == IntPtr.Zero)
{
return 0;
}
var p = (nint*)(op + ABI.RefCountOffset);
return *p;
}
/// <summary>
/// Export of Macro Py_XIncRef. Use XIncref instead.
/// Limit this function usage for Testing and Py_Debug builds
/// </summary>
/// <param name="ob">PyObject Ptr</param>
internal static void Py_IncRef(IntPtr ob) => Delegates.Py_IncRef(ob);
/// <summary>
/// Export of Macro Py_XDecRef. Use XDecref instead.
/// Limit this function usage for Testing and Py_Debug builds
/// </summary>
/// <param name="ob">PyObject Ptr</param>
internal static void Py_DecRef(IntPtr ob) => Delegates.Py_DecRef(ob);
internal static void Py_Initialize() => Delegates.Py_Initialize();
internal static void Py_InitializeEx(int initsigs) => Delegates.Py_InitializeEx(initsigs);
internal static int Py_IsInitialized() => Delegates.Py_IsInitialized();
internal static void Py_Finalize() => Delegates.Py_Finalize();
internal static IntPtr Py_NewInterpreter() => Delegates.Py_NewInterpreter();
internal static void Py_EndInterpreter(IntPtr threadState) => Delegates.Py_EndInterpreter(threadState);
internal static IntPtr PyThreadState_New(IntPtr istate) => Delegates.PyThreadState_New(istate);
internal static IntPtr PyThreadState_Get() => Delegates.PyThreadState_Get();
internal static IntPtr _PyThreadState_UncheckedGet() => Delegates._PyThreadState_UncheckedGet();
internal static IntPtr PyThread_get_key_value(IntPtr key) => Delegates.PyThread_get_key_value(key);
internal static int PyThread_get_thread_ident() => Delegates.PyThread_get_thread_ident();
internal static int PyThread_set_key_value(IntPtr key, IntPtr value) => Delegates.PyThread_set_key_value(key, value);
internal static IntPtr PyThreadState_Swap(IntPtr key) => Delegates.PyThreadState_Swap(key);
internal static IntPtr PyGILState_Ensure() => Delegates.PyGILState_Ensure();
internal static void PyGILState_Release(IntPtr gs) => Delegates.PyGILState_Release(gs);
internal static IntPtr PyGILState_GetThisThreadState() => Delegates.PyGILState_GetThisThreadState();
public static int Py_Main(int argc, string[] argv)
{
var marshaler = StrArrayMarshaler.GetInstance(null);
var argvPtr = marshaler.MarshalManagedToNative(argv);
try
{
return Delegates.Py_Main(argc, argvPtr);
}
finally
{
marshaler.CleanUpNativeData(argvPtr);
}
}
internal static void PyEval_InitThreads() => Delegates.PyEval_InitThreads();
internal static int PyEval_ThreadsInitialized() => Delegates.PyEval_ThreadsInitialized();
internal static void PyEval_AcquireLock() => Delegates.PyEval_AcquireLock();
internal static void PyEval_ReleaseLock() => Delegates.PyEval_ReleaseLock();
internal static void PyEval_AcquireThread(IntPtr tstate) => Delegates.PyEval_AcquireThread(tstate);
internal static void PyEval_ReleaseThread(IntPtr tstate) => Delegates.PyEval_ReleaseThread(tstate);
internal static IntPtr PyEval_SaveThread() => Delegates.PyEval_SaveThread();
internal static void PyEval_RestoreThread(IntPtr tstate) => Delegates.PyEval_RestoreThread(tstate);
internal static BorrowedReference PyEval_GetBuiltins() => Delegates.PyEval_GetBuiltins();
internal static BorrowedReference PyEval_GetGlobals() => Delegates.PyEval_GetGlobals();
internal static IntPtr PyEval_GetLocals() => Delegates.PyEval_GetLocals();
internal static IntPtr Py_GetProgramName() => Delegates.Py_GetProgramName();
internal static void Py_SetProgramName(IntPtr name) => Delegates.Py_SetProgramName(name);
internal static IntPtr Py_GetPythonHome() => Delegates.Py_GetPythonHome();
internal static void Py_SetPythonHome(IntPtr home) => Delegates.Py_SetPythonHome(home);
internal static IntPtr Py_GetPath() => Delegates.Py_GetPath();
internal static void Py_SetPath(IntPtr home) => Delegates.Py_SetPath(home);
internal static IntPtr Py_GetVersion() => Delegates.Py_GetVersion();
internal static IntPtr Py_GetPlatform() => Delegates.Py_GetPlatform();
internal static IntPtr Py_GetCopyright() => Delegates.Py_GetCopyright();
internal static IntPtr Py_GetCompiler() => Delegates.Py_GetCompiler();
internal static IntPtr Py_GetBuildInfo() => Delegates.Py_GetBuildInfo();
const PyCompilerFlags Utf8String = PyCompilerFlags.IGNORE_COOKIE | PyCompilerFlags.SOURCE_IS_UTF8;
internal static int PyRun_SimpleString(string code)
{
using var codePtr = new StrPtr(code, Encoding.UTF8);
return Delegates.PyRun_SimpleStringFlags(codePtr, Utf8String);
}
internal static NewReference PyRun_String(string code, RunFlagType st, BorrowedReference globals, BorrowedReference locals)
{
using var codePtr = new StrPtr(code, Encoding.UTF8);
return Delegates.PyRun_StringFlags(codePtr, st, globals, locals, Utf8String);
}
internal static IntPtr PyEval_EvalCode(IntPtr co, IntPtr globals, IntPtr locals) => Delegates.PyEval_EvalCode(co, globals, locals);
/// <summary>
/// Return value: New reference.
/// This is a simplified interface to Py_CompileStringFlags() below, leaving flags set to NULL.
/// </summary>
internal static NewReference Py_CompileString(string str, string file, int start)
{
using var strPtr = new StrPtr(str, Encoding.UTF8);
using var fileObj = new PyString(file);
return Delegates.Py_CompileStringObject(strPtr, fileObj.Reference, start, Utf8String, -1);
}
internal static NewReference PyImport_ExecCodeModule(string name, BorrowedReference code)
{
using var namePtr = new StrPtr(name, Encoding.UTF8);
return Delegates.PyImport_ExecCodeModule(namePtr, code);
}
internal static IntPtr PyCFunction_NewEx(IntPtr ml, IntPtr self, IntPtr mod) => Delegates.PyCFunction_NewEx(ml, self, mod);
internal static IntPtr PyCFunction_Call(IntPtr func, IntPtr args, IntPtr kw) => Delegates.PyCFunction_Call(func, args, kw);
internal static IntPtr PyMethod_New(IntPtr func, IntPtr self, IntPtr cls) => Delegates.PyMethod_New(func, self, cls);
//====================================================================
// Python abstract object API
//====================================================================
/// <summary>
/// Return value: Borrowed reference.
/// A macro-like method to get the type of a Python object. This is
/// designed to be lean and mean in IL & avoid managed <-> unmanaged
/// transitions. Note that this does not incref the type object.
/// </summary>
internal static unsafe IntPtr PyObject_TYPE(IntPtr op)
{
var p = (void*)op;
if ((void*)0 == p)
{
return IntPtr.Zero;
}
Debug.Assert(TypeOffset.ob_type > 0);
IntPtr* typePtr = (IntPtr*)(op + TypeOffset.ob_type);
return *typePtr;
}
internal static unsafe BorrowedReference PyObject_TYPE(BorrowedReference op)
=> new BorrowedReference(PyObject_TYPE(op.DangerousGetAddress()));
/// <summary>
/// Managed version of the standard Python C API PyObject_Type call.
/// This version avoids a managed <-> unmanaged transition.
/// This one does incref the returned type object.
/// </summary>
internal static IntPtr PyObject_Type(IntPtr op)
{
IntPtr tp = PyObject_TYPE(op);
XIncref(tp);
return tp;
}