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Platform Invoke (P/Invoke)

https://openjdk.org/projects/panama/ https://github.com/microsoft/ClangSharp https://github.com/mono/CppSharp

  • ../tool/clangsharp.md 참고

  • https://learn.microsoft.com/en-us/dotnet/standard/native-interop/native-library-loading

DllImport 순서

[DllImport("nativedep")]
static extern int ExportedFunction();


# Windows
nativedep
nativedep.dll

# Linux
nativedep.so
libnativedep.so
nativedep
libnativedep

# macOS
nativedep.dylib
libnativedep.dylib
nativedep
libnativedep
  • DllImportAttribute
    • https://learn.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.dllimportattribute
  • SetDllImportResolver
    • DllImport나 SetDllImportResolver를 통해 로드된 네이티브 라이브러리는 .NET 런타임(또는 Unity의 IL2CPP 런타임) 이 수명(lifetime)을 관리합니다. 해당 Assembly가 unload되거나 앱 종료 시 자동 해제됩니다.
    • https://learn.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.nativelibrary.setdllimportresolver?view=net-9.0
  • LibraryImportAttribute
    • https://learn.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.libraryimportattribute

https://github.com/netpyoung/SqlCipher4Unity3D/tree/master https://github.com/netpyoung/unity.webp https://github.com/netpyoung/unity.libsodium

https://github.com/netpyoung/prebuilt-libsqlcipher/blob/main/NOTE.md https://github.com/netpyoung/prebuilt-libwebp/blob/main/NOTE.md

https://github.com/netpyoung/prebuilt-libsodium https://github.com/netpyoung/prebuilt-libwebp https://github.com/netpyoung/prebuilt-libsqlcipher

Unity 한정

플랫폼런타임이 찾는 실제 파일비고
Windowshello.dll
Linuxlibhello.so
macOSlibhello.dylib
**iOS **불가빌드 시 정적 링크 필요 __Internal

  • IL2CPP/Mono 런타임이 추가되면서 .dylib도 지원하게 되었지만, Unity 문서와 빌드 파이프라인에는 여전히 .bundle이 병행 표기

  • https://endoflife.date/unity

  • C#의 정적 생성자(static ClassName())는 명시적으로 클래스가 처음 “사용될 때” 한 번만 호출됩니다.

[RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
static void Init()
{
    _ = typeof(CustomResolverDemo); // 강제로 로드
}

https://learn.microsoft.com/en-us/dotnet/framework/interop/default-marshalling-for-strings https://github.com/dotnet/runtime/blob/main/docs/design/features/source-generator-pinvokes.md https://learn.microsoft.com/en-us/dotnet/standard/native-interop/type-marshalling

Win32 - https://github.com/microsoft/CsWin32

  • bass.net with MAUI iOS cannot load native bass library
    • https://www.un4seen.com/forum/?topic=19928.0