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const bun = @import("root").bun;
const JSC = bun.JSC;
const std = @import("std");
/// This value must be kept in sync with Weak.cpp
pub const WeakRefFinalizerTag = *const fn (*anyopaque) callconv(.C) void;
const WeakImpl = opaque {
pub fn init(ptr: *anyopaque, comptime tag: ?WeakRefFinalizerTag, value: JSC.JSValue) *WeakImpl {
JSC.markBinding(@src());
return Bun__WeakRef__new(value, tag, ptr);
}
pub fn get(this: *WeakImpl) JSC.JSValue {
JSC.markBinding(@src());
return Bun__WeakRef__get(this);
}
pub fn set(this: *WeakImpl, ptr: *anyopaque, comptime tag: ?WeakRefFinalizerTag, value: JSC.JSValue) void {
JSC.markBinding(@src());
Bun__WeakRef__set(this, value, tag, ptr);
}
pub fn clear(this: *WeakImpl) void {
JSC.markBinding(@src());
Bun__WeakRef__clear(this);
}
pub fn deinit(
this: *WeakImpl,
) void {
JSC.markBinding(@src());
Bun__WeakRef__delete(this);
}
extern fn Bun__WeakRef__delete(this: *WeakImpl) void;
extern fn Bun__WeakRef__new(JSC.JSValue, ?WeakRefFinalizerTag, *anyopaque) *WeakImpl;
extern fn Bun__WeakRef__get(this: *WeakImpl) JSC.JSValue;
extern fn Bun__WeakRef__set(this: *WeakImpl, JSC.JSValue, ?WeakRefFinalizerTag, *anyopaque) void;
extern fn Bun__WeakRef__clear(this: *WeakImpl) void;
};
pub fn NewWeakFinalizer(comptime Context: type, comptime FinalizerFn: *const fn (*Context) callconv(.C) void) type {
return struct {
ref: ?*WeakImpl = null,
const finalizer: WeakRefFinalizerTag = @ptrCast(FinalizerFn);
pub const WeakFinalizer = @This();
pub fn init() WeakFinalizer {
return .{};
}
pub fn create(
ptr: *Context,
value: JSC.JSValue,
) WeakFinalizer {
if (value != .zero) {
return .{ .ref = WeakImpl.init(
ptr,
finalizer,
value,
) };
}
return .{};
}
pub fn get(this: *WeakFinalizer) ?JSC.JSValue {
var ref = this.ref orelse return null;
const result = ref.get();
if (result == .zero) {
return null;
}
return result;
}
pub fn swap(this: *WeakFinalizer) JSC.JSValue {
var ref = this.ref orelse return .zero;
const result = ref.get();
if (result == .zero) {
return .zero;
}
ref.clear();
return result;
}
pub fn has(this: *WeakFinalizer) bool {
var ref = this.ref orelse return false;
return ref.get() != .zero;
}
pub fn trySwap(this: *WeakFinalizer) ?JSC.JSValue {
const result = this.swap();
if (result == .zero) {
return null;
}
return result;
}
pub fn set(this: *WeakFinalizer, ptr: *Context, value: JSC.JSValue) void {
var ref: *WeakImpl = this.ref orelse {
if (value == .zero) return;
this.ref = WeakImpl.init(ptr, finalizer, value);
return;
};
ref.set(ptr, finalizer, value);
}
pub fn clear(this: *WeakFinalizer) void {
var ref: *WeakImpl = this.ref orelse return;
ref.clear();
}
pub fn deinit(this: *WeakFinalizer) void {
var ref: *WeakImpl = this.ref orelse return;
this.ref = null;
ref.deinit();
}
};
}
pub const Weak = struct {
ref: ?*WeakImpl = null,
pub fn init() Weak {
return .{};
}
pub fn create(
ptr: *anyopaque,
value: JSC.JSValue,
) Weak {
if (value != .zero) {
return .{ .ref = WeakImpl.init(ptr, value, null) };
}
return .{};
}
pub fn get(this: *Weak) ?JSC.JSValue {
var ref = this.ref orelse return null;
const result = ref.get();
if (result == .zero) {
return null;
}
return result;
}
pub fn swap(this: *Weak) JSC.JSValue {
var ref = this.ref orelse return .zero;
const result = ref.get();
if (result == .zero) {
return .zero;
}
ref.clear();
return result;
}
pub fn has(this: *Weak) bool {
var ref = this.ref orelse return false;
return ref.get() != .zero;
}
pub fn trySwap(this: *Weak) ?JSC.JSValue {
const result = this.swap();
if (result == .zero) {
return null;
}
return result;
}
pub fn set(this: *Weak, ptr: *anyopaque, value: JSC.JSValue) void {
var ref: *WeakImpl = this.ref orelse {
if (value == .zero) return;
this.ref = WeakImpl.init(ptr, null, value);
return;
};
ref.set(ptr, null, value);
}
pub fn clear(this: *Weak) void {
var ref: *WeakImpl = this.ref orelse return;
ref.clear();
}
pub fn deinit(this: *Weak) void {
var ref: *WeakImpl = this.ref orelse return;
this.ref = null;
ref.deinit();
}
};
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