зеркало из https://github.com/mozilla/gecko-dev.git
137 строки
5.3 KiB
C++
137 строки
5.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* Types and functions related to the compilation of JavaScript off the
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* direct JSAPI-using thread.
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*/
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#ifndef js_OffThreadScriptCompilation_h
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#define js_OffThreadScriptCompilation_h
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#include "mozilla/Range.h" // mozilla::Range
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#include "mozilla/Utf8.h" // mozilla::Utf8Unit
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#include "mozilla/Vector.h" // mozilla::Vector
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#include <stddef.h> // size_t
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#include "jstypes.h" // JS_PUBLIC_API
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#include "js/CompileOptions.h" // JS::ReadOnlyCompileOptions
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#include "js/GCVector.h" // JS::GCVector
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#include "js/Transcoding.h" // JS::TranscodeSource
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struct JS_PUBLIC_API JSContext;
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class JS_PUBLIC_API JSScript;
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namespace JS {
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template <typename UnitT>
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class SourceText;
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} // namespace JS
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namespace JS {
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class OffThreadToken;
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using OffThreadCompileCallback = void (*)(OffThreadToken* token,
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void* callbackData);
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/*
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* Off thread compilation control flow.
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*
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* After successfully triggering an off thread compile of a script, the
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* callback will eventually be invoked with the specified data and a token
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* for the compilation. The callback will be invoked while off thread,
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* so must ensure that its operations are thread safe. Afterwards, one of the
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* following functions must be invoked on the runtime's main thread:
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*
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* - FinishOffThreadScript, to get the result script (or nullptr on failure).
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* - CancelOffThreadScript, to free the resources without creating a script.
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*
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* The characters passed in to CompileOffThread must remain live until the
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* callback is invoked, and the resulting script will be rooted until the call
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* to FinishOffThreadScript.
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*/
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extern JS_PUBLIC_API bool CanCompileOffThread(
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JSContext* cx, const ReadOnlyCompileOptions& options, size_t length);
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extern JS_PUBLIC_API bool CompileOffThread(
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JSContext* cx, const ReadOnlyCompileOptions& options,
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SourceText<char16_t>& srcBuf, OffThreadCompileCallback callback,
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void* callbackData);
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// NOTE: Unlike for the normal sync compilation functions, this function NEVER
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// INFLATES TO UTF-16. Therefore, it is ALWAYS invoking experimental
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// UTF-8 support. Inflate to UTF-16 yourself and use the other overload
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// if you're unable to take a risk using unstable functionality.
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extern JS_PUBLIC_API bool CompileOffThread(
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JSContext* cx, const ReadOnlyCompileOptions& options,
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SourceText<mozilla::Utf8Unit>& srcBuf, OffThreadCompileCallback callback,
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void* callbackData);
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extern JS_PUBLIC_API JSScript* FinishOffThreadScript(JSContext* cx,
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OffThreadToken* token);
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extern JS_PUBLIC_API void CancelOffThreadScript(JSContext* cx,
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OffThreadToken* token);
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extern JS_PUBLIC_API bool CompileOffThreadModule(
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JSContext* cx, const ReadOnlyCompileOptions& options,
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SourceText<char16_t>& srcBuf, OffThreadCompileCallback callback,
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void* callbackData);
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// NOTE: Unlike for the normal sync compilation functions, this function NEVER
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// INFLATES TO UTF-16. Therefore, it is ALWAYS invoking experimental
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// UTF-8 support. Inflate to UTF-16 yourself and use the other overload
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// if you're unable to take a risk using unstable functionality.
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extern JS_PUBLIC_API bool CompileOffThreadModule(
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JSContext* cx, const ReadOnlyCompileOptions& options,
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SourceText<mozilla::Utf8Unit>& srcBuf, OffThreadCompileCallback callback,
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void* callbackData);
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extern JS_PUBLIC_API JSObject* FinishOffThreadModule(JSContext* cx,
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OffThreadToken* token);
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extern JS_PUBLIC_API void CancelOffThreadModule(JSContext* cx,
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OffThreadToken* token);
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extern JS_PUBLIC_API bool CanDecodeOffThread(
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JSContext* cx, const ReadOnlyCompileOptions& options, size_t length);
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extern JS_PUBLIC_API bool DecodeOffThreadScript(
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JSContext* cx, const ReadOnlyCompileOptions& options,
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mozilla::Vector<uint8_t>& buffer /* TranscodeBuffer& */, size_t cursor,
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OffThreadCompileCallback callback, void* callbackData);
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extern JS_PUBLIC_API bool DecodeOffThreadScript(
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JSContext* cx, const ReadOnlyCompileOptions& options,
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const mozilla::Range<uint8_t>& range /* TranscodeRange& */,
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OffThreadCompileCallback callback, void* callbackData);
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extern JS_PUBLIC_API JSScript* FinishOffThreadScriptDecoder(
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JSContext* cx, OffThreadToken* token);
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extern JS_PUBLIC_API void CancelOffThreadScriptDecoder(JSContext* cx,
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OffThreadToken* token);
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extern JS_PUBLIC_API bool DecodeMultiOffThreadScripts(
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JSContext* cx, const ReadOnlyCompileOptions& options,
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mozilla::Vector<TranscodeSource>& sources,
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OffThreadCompileCallback callback, void* callbackData);
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extern JS_PUBLIC_API bool FinishMultiOffThreadScriptsDecoder(
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JSContext* cx, OffThreadToken* token,
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MutableHandle<GCVector<JSScript*>> scripts);
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extern JS_PUBLIC_API void CancelMultiOffThreadScriptsDecoder(
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JSContext* cx, OffThreadToken* token);
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} // namespace JS
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#endif /* js_OffThreadScriptCompilation_h */
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