pythonnet/src/runtime/runtime.cs at master · ashsvis/pythonnet · GitHub

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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();

}

else

{

PyGILState_Release(state);

}

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) when (e.Is(Exceptions.ImportError))

{

// The runtime may not provided `atexit` module.

return;

}

using (atexit)

{

try

{

atexit.InvokeMethod("_run_exitfuncs").Dispose();

}

catch (PythonException e)

{

Console.Error.WriteLine(e);

}

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.CurrentMatches(Exceptions.KeyError))

{

throw PythonException.ThrowLastAsClrException();

}

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() != null)

{

throw PythonException.ThrowLastAsClrException();

}

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 DEBUG

Debug.Assert(op == IntPtr.Zero || Refcount(op) > 0);

#endif

#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;

View remainder of file in raw view

pythonnet/src/runtime/runtime.cs at master · ashsvis/pythonnet · GitHub

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