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Add function to set Py_NoSiteFlag global variable to 1 #971

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Oct 23, 2019
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1 change: 1 addition & 0 deletions AUTHORS.md
Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,7 @@

## Contributors

- Alex Helms ([@alexhelms](https://github.com/alexhelms))
- Alexandre Catarino([@AlexCatarino](https://github.com/AlexCatarino))
- Arvid JB ([@ArvidJB](https://github.com/ArvidJB))
- Benoît Hudson ([@benoithudson](https://github.com/benoithudson))
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1 change: 1 addition & 0 deletions CHANGELOG.md
Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ This document follows the conventions laid out in [Keep a CHANGELOG][].
### Added

- Added automatic NuGet package generation in appveyor and local builds
- Added function that sets Py_NoSiteFlag to 1.

### Changed

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10 changes: 10 additions & 0 deletions src/runtime/pythonengine.cs
Original file line number Diff line number Diff line change
Expand Up @@ -130,6 +130,16 @@ public static string Compiler
get { return Marshal.PtrToStringAnsi(Runtime.Py_GetCompiler()); }
}

/// <summary>
/// Set the NoSiteFlag to disable loading the site module.
/// Must be called before Initialize.
/// https://docs.python.org/3/c-api/init.html#c.Py_NoSiteFlag
/// </summary>
public static void SetNoSiteFlag()
{
Runtime.SetNoSiteFlag();
}

public static int RunSimpleString(string code)
{
return Runtime.PyRun_SimpleString(code);
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26 changes: 26 additions & 0 deletions src/runtime/runtime.cs
Original file line number Diff line number Diff line change
Expand Up @@ -414,6 +414,8 @@ internal static int AtExit()
internal static IntPtr PyNoneType;
internal static IntPtr PyTypeType;

internal static IntPtr Py_NoSiteFlag;

#if PYTHON3
internal static IntPtr PyBytesType;
#endif
Expand Down Expand Up @@ -1884,5 +1886,29 @@ internal static IntPtr PyMem_Realloc(IntPtr ptr, long size)

[DllImport(_PythonDll, CallingConvention = CallingConvention.Cdecl)]
internal static extern int Py_MakePendingCalls();

internal static void SetNoSiteFlag()
{
var loader = LibraryLoader.Get(OperatingSystem);

IntPtr dllLocal;
if (_PythonDll != "__Internal")
{
dllLocal = loader.Load(_PythonDll);
}

try
{
Py_NoSiteFlag = loader.GetFunction(dllLocal, "Py_NoSiteFlag");
Marshal.WriteInt32(Py_NoSiteFlag, 1);
}
finally
{
if (dllLocal != IntPtr.Zero)
{
loader.Free(dllLocal);
}
}
}
}
}