/// <summary>
/// Attempts to load a native library.
/// </summary>
/// <param name="windowsNames">
/// Possible names of the library on Windows. This can include full paths.
/// </param>
/// <param name="linuxNames">
/// Possible names of the library on Linux.
/// </param>
/// <param name="osxNames">
/// Possible names of the library on macOS.
/// </param>
/// <returns>
/// A handle to the library when found; otherwise, <see cref="IntPtr.Zero"/>.
/// </returns>
public static IntPtr LoadNativeLibrary(IEnumerable <string> windowsNames, IEnumerable <string> linuxNames, IEnumerable <string> osxNames)
{
IntPtr lib = IntPtr.Zero;
if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
foreach (var name in linuxNames)
{
lib = LinuxNativeMethods.dlopen(name, LinuxNativeMethods.RTLD_NOW);
if (lib != IntPtr.Zero)
{
break;
}
}
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
foreach (var name in osxNames)
{
lib = MacNativeMethods.dlopen(name, MacNativeMethods.RTLD_NOW);
if (lib != IntPtr.Zero)
{
break;
}
}
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
foreach (var name in windowsNames)
{
lib = WindowsNativeMethods.LoadLibrary(name);
if (lib != IntPtr.Zero)
{
break;
}
}
}
else
{
throw new PlatformNotSupportedException();
}
// This function may return a null handle. If it does, individual functions loaded from it will throw a DllNotFoundException,
// but not until an attempt is made to actually use the function (rather than load it). This matches how PInvokes behave.
return(lib);
}
private static IntPtr LoadFunctionPointer(IntPtr nativeLibraryHandle, string functionName)
{
if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
return(LinuxNativeMethods.dlsym(nativeLibraryHandle, functionName));
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
return(MacNativeMethods.dlsym(nativeLibraryHandle, functionName));
}
else if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
return(WindowsNativeMethods.GetProcAddress(nativeLibraryHandle, functionName));
}
else
{
throw new PlatformNotSupportedException();
}
}