remove many usingnamespace, introduce new ref count and ref leak debugging tools (#18353)

src/sourcemap/sourcemap.zig

@@ -191,7 +191,7 @@ pub fn parseJSON(
             .fail => |fail| return fail.err,
         };
 
-        const ptr = ParsedSourceMap.new(map_data);
+        const ptr = bun.new(ParsedSourceMap, map_data);
         ptr.external_source_names = source_paths_slice.?;
         break :map ptr;
     } else null;
@@ -582,6 +582,7 @@ pub const Mapping = struct {
         }
 
         return .{ .success = .{
+            .ref_count = .init(),
             .mappings = mapping,
             .input_line_count = input_line_count,
         } };
@@ -612,6 +613,14 @@ pub const ParseResult = union(enum) {
 };
 
 pub const ParsedSourceMap = struct {
+    const RefCount = bun.ptr.ThreadSafeRefCount(@This(), "ref_count", deinit, .{});
+    pub const ref = RefCount.ref;
+    pub const deref = RefCount.deref;
+
+    /// ParsedSourceMap can be acquired by different threads via the thread-safe
+    /// source map store (SavedSourceMap), so the reference count must be thread-safe.
+    ref_count: RefCount,
+
     input_line_count: usize = 0,
     mappings: Mapping.List = .{},
     /// If this is empty, this implies that the source code is a single file
@@ -629,12 +638,8 @@ pub const ParsedSourceMap = struct {
     /// rely on source contents)
     underlying_provider: SourceContentPtr = .none,
 
-    ref_count: std.atomic.Value(u32) = .init(1),
-
     is_standalone_module_graph: bool = false,
 
-    pub usingnamespace bun.NewThreadSafeRefCounted(ParsedSourceMap, deinitFn, null);
-
     const SourceContentPtr = packed struct(u64) {
         load_hint: SourceMapLoadHint,
         data: u62,
@@ -654,11 +659,9 @@ pub const ParsedSourceMap = struct {
         return psm.external_source_names.len != 0;
     }
 
-    fn deinitFn(this: *ParsedSourceMap) void {
-        this.deinitWithAllocator(bun.default_allocator);
-    }
+    fn deinit(this: *ParsedSourceMap) void {
+        const allocator = bun.default_allocator;
 
-    fn deinitWithAllocator(this: *ParsedSourceMap, allocator: std.mem.Allocator) void {
         this.mappings.deinit(allocator);
 
         if (this.external_source_names.len > 0) {
@@ -667,7 +670,7 @@ pub const ParsedSourceMap = struct {
             allocator.free(this.external_source_names);
         }
 
-        this.destroy();
+        bun.destroy(this);
     }
 
     fn standaloneModuleGraphData(this: *ParsedSourceMap) *bun.StandaloneModuleGraph.SerializedSourceMap.Loaded {