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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
*
* Copyright 2020 Mozilla Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef wasm_context_h
#define wasm_context_h
#include "mozilla/DoublyLinkedList.h"
namespace js::wasm {
#ifdef ENABLE_WASM_JSPI
class SuspenderObject;
class SuspenderObjectData;
class SuspenderContext {
private:
HeapPtr<SuspenderObject*> activeSuspender_;
// Using double-linked list to avoid allocation in the JIT code.
mozilla::DoublyLinkedList<SuspenderObjectData> suspendedStacks_;
public:
SuspenderContext();
~SuspenderContext();
SuspenderObject* activeSuspender();
void setActiveSuspender(SuspenderObject* obj);
void trace(JSTracer* trc);
void traceRoots(JSTracer* trc);
friend class SuspenderObject;
};
#endif // ENABLE_WASM_JSPI
// wasm::Context lives in JSContext and contains the wasm-related per-context
// state.
class Context {
public:
Context()
: triedToInstallSignalHandlers(false),
haveSignalHandlers(false)
#ifdef ENABLE_WASM_JSPI
,
suspendableStackLimit(JS::NativeStackLimitMin),
suspendableStacksCount(0)
#endif
{
}
// Used by wasm::EnsureThreadSignalHandlers(cx) to install thread signal
// handlers once per JSContext/thread.
bool triedToInstallSignalHandlers;
bool haveSignalHandlers;
#ifdef ENABLE_WASM_JSPI
JS::NativeStackLimit suspendableStackLimit;
mozilla::Atomic<uint32_t> suspendableStacksCount;
SuspenderContext promiseIntegration;
#endif
};
} // namespace js::wasm
#endif // wasm_context_h