From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- dom/bindings/PinnedStringId.h | 48 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 dom/bindings/PinnedStringId.h (limited to 'dom/bindings/PinnedStringId.h') diff --git a/dom/bindings/PinnedStringId.h b/dom/bindings/PinnedStringId.h new file mode 100644 index 0000000000..3d18c1b07c --- /dev/null +++ b/dom/bindings/PinnedStringId.h @@ -0,0 +1,48 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef DOM_BINDINGS_PINNEDSTRINGID_H_ +#define DOM_BINDINGS_PINNEDSTRINGID_H_ + +#include "js/GCAnnotations.h" +#include "js/Id.h" +#include "js/RootingAPI.h" +#include "js/String.h" +#include "jsapi.h" + +class JSString; +struct JSContext; + +namespace mozilla::dom { +/* + * Holds a jsid that is initialized to a pinned string, with automatic + * conversion to Handle, as it is held live forever by pinning. + */ +class PinnedStringId { + jsid id; + + public: + constexpr PinnedStringId() : id(JS::PropertyKey::Void()) {} + + bool init(JSContext* cx, const char* string) { + JSString* str = JS_AtomizeAndPinString(cx, string); + if (!str) { + return false; + } + id = JS::PropertyKey::fromPinnedString(str); + return true; + } + + operator const jsid&() const { return id; } + + operator JS::Handle() const { + /* This is safe because we have pinned the string. */ + return JS::Handle::fromMarkedLocation(&id); + } +} JS_HAZ_ROOTED; +} // namespace mozilla::dom + +#endif -- cgit v1.2.3