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186c53000d
- Introduce an UnownedSerialExecutor type into the concurrency library. - Create a SerialExecutor protocol which allows an executor type to change how it executes jobs. - Add an unownedExecutor requirement to the Actor protocol. - Change the ABI for ExecutorRef so that it stores a SerialExecutor witness table pointer in the implementation field. This effectively makes ExecutorRef an `unowned(unsafe) SerialExecutor`, except that default actors are represented without a witness table pointer (just a bit-pattern). - Synthesize the unownedExecutor method for default actors (i.e. actors that don't provide an unownedExecutor property). - Make synthesized unownedExecutor properties `final`, and give them a semantics attribute specifying that they're for default actors. - Split `Builtin.buildSerialExecutorRef` into a few more precise builtins. We're not using the main-actor one yet, though. Pitch thread: https://forums.swift.org/t/support-custom-executors-in-swift-concurrency/44425
79 lines
2.5 KiB
C++
79 lines
2.5 KiB
C++
//===--- GenConcurrency.h - IRGen for concurrency features ------*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines interfaces for emitting code for various concurrency
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// features.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_IRGEN_GENCONCURRENCY_H
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#define SWIFT_IRGEN_GENCONCURRENCY_H
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#include "swift/AST/Types.h"
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#include "swift/Basic/LLVM.h"
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#include "swift/SIL/ApplySite.h"
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#include "llvm/IR/CallingConv.h"
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#include "Callee.h"
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#include "GenHeap.h"
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#include "IRGenModule.h"
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namespace llvm {
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class Value;
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}
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namespace swift {
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class CanType;
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class ProtocolConformanceRef;
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class SILType;
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namespace irgen {
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class Explosion;
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class IRGenFunction;
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/// Emit the buildMainActorExecutorRef builtin.
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void emitBuildMainActorExecutorRef(IRGenFunction &IGF, Explosion &out);
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/// Emit the buildDefaultActorExecutorRef builtin.
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void emitBuildDefaultActorExecutorRef(IRGenFunction &IGF, llvm::Value *actor,
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Explosion &out);
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/// Emit the buildOrdinarySerialExecutorRef builtin.
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void emitBuildOrdinarySerialExecutorRef(IRGenFunction &IGF,
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llvm::Value *executor,
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CanType executorType,
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ProtocolConformanceRef executorConformance,
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Explosion &out);
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/// Emit the getCurrentExecutor builtin.
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void emitGetCurrentExecutor(IRGenFunction &IGF, Explosion &out);
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/// Emit the createAsyncLet builtin.
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llvm::Value *emitBuiltinStartAsyncLet(IRGenFunction &IGF,
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llvm::Value *taskFunction,
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llvm::Value *localContextInfo,
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SubstitutionMap subs);
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/// Emit the endAsyncLet builtin.
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void emitEndAsyncLet(IRGenFunction &IGF, llvm::Value *alet);
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/// Emit the createTaskGroup builtin.
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llvm::Value *emitCreateTaskGroup(IRGenFunction &IGF);
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/// Emit the destroyTaskGroup builtin.
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void emitDestroyTaskGroup(IRGenFunction &IGF, llvm::Value *group);
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} // end namespace irgen
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} // end namespace swift
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#endif
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