forked from mirrors/gecko-dev
703dbdfe3a
Generate the C++ and JS code to handle UniFFI bindings. The WebIDL code is completely static and doesn't need to be generated. There's support for both synchronus and async functions, but we haven't decided the how we want this to be configured. In practice, almost all functions will need to be async, so for now we're just forcing all functions to be. The `uniffi-bindgen-gecko-js` crate builds the binary that generates the bindings. This binary needs to be fed a list of UDL files, the path of the .cpp file to generate, and the directory to generate .jsm files in (and also all of those arguments again, but for the test fixtures). This is quiet a horrible UI, but it's going to be wrapped in a mach command. The `uniffi-js` directory contains shared C++ code for `uniffi-bindgen-gecko-js`. As much as possible we tried to put the functionality here and have the generated code simply forward function calls here. Still Todo: - CallbackInterfaces - Custom and external types - Datetime and TimeInterval Differential Revision: https://phabricator.services.mozilla.com/D144472
147 lines
5.5 KiB
C++
147 lines
5.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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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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#include <inttypes.h>
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#include "nsError.h"
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#include "nsString.h"
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#include "nsPrintfCString.h"
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#include "mozilla/Maybe.h"
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#include "mozilla/dom/UniFFIScaffolding.h"
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// This file implements the UniFFI WebIDL interface by leveraging the generate
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// code in UniFFIScaffolding.cpp and UniFFIFixtureScaffolding.cpp. It's main
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// purpose is to check if MOZ_UNIFFI_FIXTURES is set and only try calling the
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// scaffolding code if it is.
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using mozilla::dom::GlobalObject;
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using mozilla::dom::Promise;
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using mozilla::dom::RootedDictionary;
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using mozilla::dom::ScaffoldingType;
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using mozilla::dom::Sequence;
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using mozilla::dom::UniFFIPointer;
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using mozilla::dom::UniFFIScaffoldingCallResult;
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namespace mozilla::uniffi {
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// Prototypes for the generated functions
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Maybe<already_AddRefed<Promise>> UniFFICallAsync(
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const GlobalObject& aGlobal, uint64_t aId,
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const Sequence<ScaffoldingType>& aArgs, ErrorResult& aError);
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bool UniFFICallSync(const GlobalObject& aGlobal, uint64_t aId,
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const Sequence<ScaffoldingType>& aArgs,
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RootedDictionary<UniFFIScaffoldingCallResult>& aReturnValue,
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ErrorResult& aError);
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Maybe<already_AddRefed<UniFFIPointer>> UniFFIReadPointer(
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const GlobalObject& aGlobal, uint64_t aId, const ArrayBuffer& aArrayBuff,
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long aPosition, ErrorResult& aError);
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bool UniFFIWritePointer(const GlobalObject& aGlobal, uint64_t aId,
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const UniFFIPointer& aPtr,
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const ArrayBuffer& aArrayBuff, long aPosition,
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ErrorResult& aError);
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#ifdef MOZ_UNIFFI_FIXTURES
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Maybe<already_AddRefed<Promise>> UniFFIFixturesCallAsync(
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const GlobalObject& aGlobal, uint64_t aId,
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const Sequence<ScaffoldingType>& aArgs, ErrorResult& aError);
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bool UniFFIFixturesCallSync(
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const GlobalObject& aGlobal, uint64_t aId,
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const Sequence<ScaffoldingType>& aArgs,
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RootedDictionary<UniFFIScaffoldingCallResult>& aReturnValue,
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ErrorResult& aError);
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Maybe<already_AddRefed<UniFFIPointer>> UniFFIFixturesReadPointer(
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const GlobalObject& aGlobal, uint64_t aId, const ArrayBuffer& aArrayBuff,
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long aPosition, ErrorResult& aError);
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bool UniFFIFixturesWritePointer(const GlobalObject& aGlobal, uint64_t aId,
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const UniFFIPointer& aPtr,
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const ArrayBuffer& aArrayBuff, long aPosition,
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ErrorResult& aError);
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#endif
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} // namespace mozilla::uniffi
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namespace mozilla::dom {
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// Implement the interface using the generated functions
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already_AddRefed<Promise> UniFFIScaffolding::CallAsync(
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const GlobalObject& aGlobal, uint64_t aId,
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const Sequence<ScaffoldingType>& aArgs, ErrorResult& aError) {
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Maybe<already_AddRefed<Promise>> firstTry =
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uniffi::UniFFICallAsync(aGlobal, aId, aArgs, aError);
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if (firstTry.isSome()) {
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return firstTry.extract();
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}
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#ifdef MOZ_UNIFFI_FIXTURES
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Maybe<already_AddRefed<Promise>> secondTry =
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uniffi::UniFFIFixturesCallAsync(aGlobal, aId, aArgs, aError);
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if (secondTry.isSome()) {
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return secondTry.extract();
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}
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#endif
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aError.ThrowUnknownError(
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nsPrintfCString("Unknown function id: %" PRIu64, aId));
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return nullptr;
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}
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void UniFFIScaffolding::CallSync(
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const GlobalObject& aGlobal, uint64_t aId,
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const Sequence<ScaffoldingType>& aArgs,
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RootedDictionary<UniFFIScaffoldingCallResult>& aReturnValue,
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ErrorResult& aError) {
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if (uniffi::UniFFICallSync(aGlobal, aId, aArgs, aReturnValue, aError)) {
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return;
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}
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#ifdef MOZ_UNIFFI_FIXTURES
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if (uniffi::UniFFIFixturesCallSync(aGlobal, aId, aArgs, aReturnValue,
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aError)) {
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return;
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}
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#endif
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aError.ThrowUnknownError(
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nsPrintfCString("Unknown function id: %" PRIu64, aId));
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}
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already_AddRefed<UniFFIPointer> UniFFIScaffolding::ReadPointer(
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const GlobalObject& aGlobal, uint64_t aId, const ArrayBuffer& aArrayBuff,
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long aPosition, ErrorResult& aError) {
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Maybe<already_AddRefed<UniFFIPointer>> firstTry =
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uniffi::UniFFIReadPointer(aGlobal, aId, aArrayBuff, aPosition, aError);
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if (firstTry.isSome()) {
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return firstTry.extract();
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}
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#ifdef MOZ_UNIFFI_FIXTURES
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Maybe<already_AddRefed<UniFFIPointer>> secondTry =
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uniffi::UniFFIFixturesReadPointer(aGlobal, aId, aArrayBuff, aPosition,
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aError);
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if (secondTry.isSome()) {
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return secondTry.extract();
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}
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#endif
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aError.ThrowUnknownError(nsPrintfCString("Unknown object id: %" PRIu64, aId));
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return nullptr;
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}
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void UniFFIScaffolding::WritePointer(const GlobalObject& aGlobal, uint64_t aId,
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const UniFFIPointer& aPtr,
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const ArrayBuffer& aArrayBuff,
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long aPosition, ErrorResult& aError) {
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if (uniffi::UniFFIWritePointer(aGlobal, aId, aPtr, aArrayBuff, aPosition,
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aError)) {
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return;
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}
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#ifdef MOZ_UNIFFI_FIXTURES
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if (uniffi::UniFFIFixturesWritePointer(aGlobal, aId, aPtr, aArrayBuff,
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aPosition, aError)) {
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return;
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}
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#endif
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aError.ThrowUnknownError(nsPrintfCString("Unknown object id: %" PRIu64, aId));
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}
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} // namespace mozilla::dom
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