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

}

static string _PythonDll = GetDefaultDllName();

private static string GetDefaultDllName()

}

private static string GetDefaultDllName(Version version)

}

// 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

}

const string RunSysPropName = "__pythonnet_run__";

static int run = 0;

internal static int GetRun()

}

/// 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)

}

static void NewRun()

}

private static void InitPyMembers()

}

private static IntPtr Get_PyObject_NextNotImplemented()

}

/// <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)

}

internal static void Shutdown(ShutdownMode mode)

}

const int MaxCollectRetriesOnShutdown = 20;

internal static int _collected;

static bool TryCollectingGarbage()

}

internal static void Shutdown()

}

static void DisposeLazyModule(Lazy<PyObject> module)

}

private static Lazy<PyObject> GetModuleLazy(string moduleName)

=> moduleName is null

? throw new ArgumentNullException(nameof(moduleName))

: new Lazy<PyObject>(() => PyModule.Import(moduleName), isThreadSafe: false);

internal static ShutdownMode GetDefaultShutdownMode()

}

private static void RunExitFuncs()

}

private static void SetPyMember(ref IntPtr obj, IntPtr value, Action onRelease)

}

private static void SetPyMemberTypeOf(ref IntPtr obj, IntPtr value, Action onRelease)

}

private static void ResetPyMembers()

{

_pyRefs.Release();

}

private static void ClearClrModules()

}

private static void RemoveClrRootModule()

}

private static void PyDictTryDelItem(BorrowedReference dict, string key)

}

private static void MoveClrInstancesOnwershipToPython()

}

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 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;

private static Lazy<PyObject> inspect;

internal static PyObject InspectModule => inspect.Value;

private static Lazy<PyObject> clrInterop;

internal static PyObject InteropModule => clrInterop.Value;

internal static BorrowedReference CLRMetaType => new BorrowedReference(PyCLRMetaType);

public static 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()

}

internal static IntPtr ExtendTuple(IntPtr t, params IntPtr[] args)

}

internal static Type[] PythonArgsToTypeArray(IntPtr arg)

{

return PythonArgsToTypeArray(arg, false);

}

internal static Type[] PythonArgsToTypeArray(IntPtr arg, bool mangleObjects)

}

/// <summary>

/// Managed exports of the Python C API. Where appropriate, we do

/// some optimization to avoid managed &lt;--&gt; unmanaged transitions

/// (mostly for heavily used methods).

/// </summary>

internal static unsafe void XIncref(IntPtr op)

}

/// <summary>

/// Increase Python's ref counter for the given object, and get the object back.

/// </summary>

internal static IntPtr SelfIncRef(IntPtr op)

}

internal static unsafe void XDecref(IntPtr op)

{

#if DEBUG

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

Debug.Assert(_isInitialized || Py_IsInitialized() != 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;

}

[Pure]

internal static long Refcount(BorrowedReference op)

=> Refcount(op.DangerousGetAddress());

/// <summary>

/// Call specified function, and handle PythonDLL-related failures.

/// </summary>

internal static T TryUsingDll<T>(Func<T> op)

{

try

{

return op();

}

catch (TypeInitializationException loadFailure)

{

var delegatesLoadFailure = loadFailure;

// failure to load Delegates type might have been the cause

// of failure to load some higher-level type

while (delegatesLoadFailure.InnerException is TypeInitializationException nested)

{

delegatesLoadFailure = nested;

}

if (delegatesLoadFailure.InnerException is BadPythonDllException badDll)

{

throw badDll;

}

throw;

}

}

/// <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();