C#•16mo ago

P/Invoke boolean call always returns true in Release builds

I have a simple boolean function in a native C++ DLL (for keyboard input in my case), which I P/Invoke from C#.
In debug builds, everything works fine.
But in a release build (of both the C# and C++ projects), the C# side always receives true from the P/Invoke call, even when the native side returns false.
I've checked my build settings but I can't figure out what is happening here- any recommendations for how to debug this or what could be the potential cause?

For reference - my code looks a little bit something like this:
C++:

bool sb_IsKeyDown(int key)
{
  return keyboardState[key];
}

bool sb_IsKeyDown(int key)
{
  return keyboardState[key];
}

bool sb_IsKeyDown(int key)
{
  return keyboardState[key];
}

bool sb_IsKeyDown(int key)
{
  return keyboardState[key];
}

C#:

[DllImport(DLL_NAME, CallingConvention = CallingConvention.Cdecl)]
private static extern bool sb_IsKeyDown(int key); // Returns true when it shouldn't in Release builds.

[DllImport(DLL_NAME, CallingConvention = CallingConvention.Cdecl)]
private static extern bool sb_IsKeyDown(int key); // Returns true when it shouldn't in Release builds.

[DllImport(DLL_NAME, CallingConvention = CallingConvention.Cdecl)]
private static extern bool sb_IsKeyDown(int key); // Returns true when it shouldn't in Release builds.

[DllImport(DLL_NAME, CallingConvention = CallingConvention.Cdecl)]
private static extern bool sb_IsKeyDown(int key); // Returns true when it shouldn't in Release builds.

Please ping me on reply, thank you!

P/Invoke boolean call always returns true in Release builds

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