private static IntPtr GetFunctionPointer(IntPtr nativeLibraryHandle, string functionName)
{
#if NET45
switch (LibraryLoader.GetPlatformId())
{
case PlatformID.MacOSX:
return(MacNativeMethods.dlsym(nativeLibraryHandle, functionName));
case PlatformID.Unix:
return(LinuxNativeMethods.dlsym(nativeLibraryHandle, functionName));
case PlatformID.Win32NT:
case PlatformID.Win32S:
case PlatformID.Win32Windows:
return(WindowsNativeMethods.GetProcAddress(nativeLibraryHandle, functionName));
default:
throw new PlatformNotSupportedException();
}
#else
if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
{
return(LinuxNativeMethods.dlsym(nativeLibraryHandle, functionName));
}
if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
{
return(MacNativeMethods.dlsym(nativeLibraryHandle, functionName));
}
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
{
return(WindowsNativeMethods.GetProcAddress(nativeLibraryHandle, functionName));
}
throw new PlatformNotSupportedException();
#endif
}
/// <summary>
/// Attempts to load a native library.
/// </summary>
/// <param name="libraryName">Name of the library.</param>
/// <returns>
/// A handle to the library when found; otherwise, <see cref="IntPtr.Zero" />.
/// </returns>
/// <remarks>
/// 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.
/// </remarks>
public static IntPtr LoadNativeLibrary(string libraryName)
{
switch (GetPlatformId())
{
case PlatformID.MacOSX:
return(MacNativeMethods.dlopen(libraryName, MacNativeMethods.RTLD_NOW));
case PlatformID.Unix:
return(LinuxNativeMethods.dlopen(libraryName, LinuxNativeMethods.RTLD_NOW));
case PlatformID.Win32NT:
case PlatformID.Win32S:
case PlatformID.Win32Windows:
return(WindowsNativeMethods.LoadLibrary(libraryName));
default:
throw new PlatformNotSupportedException();
}
}