mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-10-19 22:49:47 +00:00
f2a170bcfb
This cache is referenced by a few parts of the JS API spec, including the threads spec (such as in toFixedLengthBuffer), as well as the "refresh the Memory buffer" algorithm, which was implemented as a method of Memory before this change. Now, this algorithm can be implemented in a spec-like fashion (though it mostly seems to add extra complexity). This change also fixes a bug where memories that were re-exported from an imported WebAssembly.Memory were given a distinct WebAssembly.Memory object, since the caching that existed in Instance.cpp was instance-local, not global to the realm. We also make Memory::m_buffer non-lazy, since we have to implement "initialize a memory object" correctly anyway.
57 lines
1.5 KiB
C++
57 lines
1.5 KiB
C++
/*
|
|
* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
|
|
* Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <AK/Optional.h>
|
|
#include <LibGC/Ptr.h>
|
|
#include <LibJS/Forward.h>
|
|
#include <LibJS/Runtime/ArrayBuffer.h>
|
|
#include <LibWasm/AbstractMachine/AbstractMachine.h>
|
|
#include <LibWeb/Bindings/ExceptionOrUtils.h>
|
|
#include <LibWeb/Bindings/PlatformObject.h>
|
|
|
|
namespace Web::WebAssembly {
|
|
|
|
struct MemoryDescriptor {
|
|
u32 initial { 0 };
|
|
Optional<u32> maximum;
|
|
Optional<bool> shared;
|
|
};
|
|
|
|
class Memory : public Bindings::PlatformObject {
|
|
WEB_PLATFORM_OBJECT(Memory, Bindings::PlatformObject);
|
|
GC_DECLARE_ALLOCATOR(Memory);
|
|
|
|
enum class Shared {
|
|
No,
|
|
Yes,
|
|
};
|
|
|
|
public:
|
|
static WebIDL::ExceptionOr<GC::Ref<Memory>> construct_impl(JS::Realm&, MemoryDescriptor& descriptor);
|
|
|
|
WebIDL::ExceptionOr<u32> grow(u32 delta);
|
|
WebIDL::ExceptionOr<GC::Ref<JS::ArrayBuffer>> buffer() const;
|
|
|
|
Wasm::MemoryAddress address() const { return m_address; }
|
|
|
|
private:
|
|
Memory(JS::Realm&, Wasm::MemoryAddress, Shared shared);
|
|
|
|
virtual void initialize(JS::Realm&) override;
|
|
virtual void visit_edges(Visitor&) override;
|
|
|
|
static void refresh_the_memory_buffer(JS::VM&, JS::Realm&, Wasm::MemoryAddress);
|
|
static GC::Ref<JS::ArrayBuffer> create_a_fixed_length_memory_buffer(JS::VM&, JS::Realm&, Wasm::MemoryAddress, Shared shared);
|
|
|
|
Wasm::MemoryAddress m_address;
|
|
Shared m_shared { Shared::No };
|
|
mutable GC::Ptr<JS::ArrayBuffer> m_buffer;
|
|
};
|
|
|
|
}
|