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[Dlfcn] Add an enum to specify the mode to dlopen #15438

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Merged
merged 1 commit into from
Jul 13, 2022
Merged

[Dlfcn] Add an enum to specify the mode to dlopen #15438

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21 changes: 19 additions & 2 deletions src/ObjCRuntime/Dlfcn.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -80,6 +80,18 @@ public enum RTLD {
MainOnly = -5
}

[Flags]
public enum Mode : int {
None = 0x0,
Lazy = 0x1,
Now = 0x2,
Local = 0x4,
Global = 0x8,
NoLoad = 0x10,
NoDelete = 0x80,
First = 0x100,
}

#if MONOMAC
[DllImport (Constants.libcLibrary)]
internal static extern int dladdr (IntPtr addr, out Dl_info info);
Expand All @@ -97,13 +109,18 @@ internal struct Dl_info
public static extern int dlclose (IntPtr handle);

[DllImport (Constants.libSystemLibrary, EntryPoint="dlopen")]
internal static extern IntPtr _dlopen (string? path, int mode /* this is int32, not nint */);
internal static extern IntPtr _dlopen (string? path, Mode mode /* this is int32, not nint */);

public static IntPtr dlopen (string? path, int mode)
{
return dlopen (path, mode, showWarning: true);
}

public static IntPtr dlopen (string? path, Mode mode)
{
return _dlopen (path, mode);
}

static bool warningShown;
// the linker can eliminate the body of this method (and the above static variable) on release builds
static void WarnOnce ()
Expand All @@ -115,7 +132,7 @@ static void WarnOnce ()

internal static IntPtr dlopen (string? path, int mode, bool showWarning)
{
var x = _dlopen (path, mode);
var x = _dlopen (path, (Mode) mode);
if (x != IntPtr.Zero)
return x;

Expand Down