vfs: Don't set FileContext.inner initially but provide FileContext.initializer

This allows file providers to know whether an interaction is the first one made with a specific resource descriptor.

1 files changed, 5 insertions, 5 deletions

diff --git a/src/lib/resources.zig b/src/lib/resources.zig
index e02e96c..4a2ae7b 100644
--- a/src/lib/resources.zig
+++ b/src/lib/resources.zig
@@ -348,21 +348,21 @@ fn addDir(path: []const u8) !void {
     });
 }
 
-fn open(context: *vfs.FileContext) !void {
+fn open(context: *vfs.FileContext, initializer: ?*anyopaque) !void {
     const allocator = vfs.treeRoot().allocator;
 
-    const inner = context.inner orelse return Error.NoTarFileInitializer;
-    const old_context: *FileContext = @alignCast(@ptrCast(inner));
+    const init_to = initializer orelse return Error.NoTarFileInitializer;
+    const init_context: *FileContext = @alignCast(@ptrCast(init_to));
 
     const new_context = try allocator.create(FileContext);
-    new_context.* = old_context.*;
+    new_context.* = init_context.*;
 
     context.inner = new_context;
 }
 
 fn read(context: *vfs.FileContext, ptr: [*]u8, len: usize) callconv(.C) Result(usize) {
     if (context.inner == null) {
-        open(context) catch |err| {
+        open(context, context.initializer) catch |err| {
             return Result(usize).fromAnyTypeOrError(err);
         };
     }