Merge pull request #36 from apple/unsupported-library-evolution-fixes

Fix build errors with library evolution enabled

Author: lorentey

Sources/Atomics/AtomicBool.swift.gyb

@@ -20,6 +20,7 @@ ${autogenerated_warning()}
 import _AtomicsShims
 
 extension Bool: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = Bool
     @usableFromInline

Sources/Atomics/AtomicLazyReference.swift.gyb

@@ -2,7 +2,7 @@
 //
 // This source file is part of the Swift Atomics open source project
 //
-// Copyright (c) 2020 Apple Inc. and the Swift project authors
+// Copyright (c) 2020-2021 Apple Inc. and the Swift project authors
 // Licensed under Apache License v2.0 with Runtime Library Exception
 //
 // See https://swift.org/LICENSE.txt for license information
@@ -124,6 +124,7 @@ extension UnsafeAtomicLazyReference {
 ///
 /// These values can be set (initialized) exactly once, but read many
 /// times.
+@_fixed_layout
 public class ManagedAtomicLazyReference<Instance: AnyObject> {
   /// The value logically stored in an atomic lazy reference value.
   public typealias Value = Instance?

Sources/Atomics/AtomicStrongReference.swift

@@ -318,6 +318,7 @@ internal struct _AtomicReferenceStorage {
   }
 }
 
+@frozen
 public struct AtomicReferenceStorage<Value: AnyObject> {
   @usableFromInline
   internal var _storage: _AtomicReferenceStorage
@@ -441,6 +442,7 @@ extension AtomicReferenceStorage: AtomicStorage {
   }
 }
 
+@frozen
 public struct AtomicOptionalReferenceStorage<Instance: AnyObject> {
   @usableFromInline
   internal var _storage: _AtomicReferenceStorage

Sources/Atomics/HighLevelTypes.swift.gyb

@@ -2,7 +2,7 @@
 //
 // This source file is part of the Swift Atomics open source project
 //
-// Copyright (c) 2020 Apple Inc. and the Swift project authors
+// Copyright (c) 2020-2021 Apple Inc. and the Swift project authors
 // Licensed under Apache License v2.0 with Runtime Library Exception
 //
 // See https://swift.org/LICENSE.txt for license information
@@ -72,6 +72,7 @@ public struct UnsafeAtomic<Value: AtomicValue> {
 }
 
 /// A reference type holding an atomic value, with automatic memory management.
+@_fixed_layout
 public class ManagedAtomic<Value: AtomicValue> {
   @usableFromInline
   internal var _storage: Value.AtomicRepresentation

Sources/Atomics/IntegerConformances.swift.gyb

@@ -2,7 +2,7 @@
 //
 // This source file is part of the Swift Atomics open source project
 //
-// Copyright (c) 2020 Apple Inc. and the Swift project authors
+// Copyright (c) 2020-2021 Apple Inc. and the Swift project authors
 // Licensed under Apache License v2.0 with Runtime Library Exception
 //
 // See https://swift.org/LICENSE.txt for license information
@@ -30,6 +30,7 @@ import _AtomicsShims
 #if !(os(Linux) && arch(x86_64)) || ENABLE_DOUBLEWIDE_ATOMICS
 %  end
 extension ${swiftType}: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = ${swiftType}
 

Sources/Atomics/autogenerated/AtomicBool.swift

@@ -21,6 +21,7 @@
 import _AtomicsShims
 
 extension Bool: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = Bool
     @usableFromInline

Sources/Atomics/autogenerated/AtomicLazyReference.swift

@@ -2,7 +2,7 @@
 //
 // This source file is part of the Swift Atomics open source project
 //
-// Copyright (c) 2020 Apple Inc. and the Swift project authors
+// Copyright (c) 2020-2021 Apple Inc. and the Swift project authors
 // Licensed under Apache License v2.0 with Runtime Library Exception
 //
 // See https://swift.org/LICENSE.txt for license information
@@ -127,6 +127,7 @@ extension UnsafeAtomicLazyReference {
 ///
 /// These values can be set (initialized) exactly once, but read many
 /// times.
+@_fixed_layout
 public class ManagedAtomicLazyReference<Instance: AnyObject> {
   /// The value logically stored in an atomic lazy reference value.
   public typealias Value = Instance?

Sources/Atomics/autogenerated/HighLevelTypes.swift

@@ -2,7 +2,7 @@
 //
 // This source file is part of the Swift Atomics open source project
 //
-// Copyright (c) 2020 Apple Inc. and the Swift project authors
+// Copyright (c) 2020-2021 Apple Inc. and the Swift project authors
 // Licensed under Apache License v2.0 with Runtime Library Exception
 //
 // See https://swift.org/LICENSE.txt for license information
@@ -74,6 +74,7 @@ public struct UnsafeAtomic<Value: AtomicValue> {
 }
 
 /// A reference type holding an atomic value, with automatic memory management.
+@_fixed_layout
 public class ManagedAtomic<Value: AtomicValue> {
   @usableFromInline
   internal var _storage: Value.AtomicRepresentation

Sources/Atomics/autogenerated/IntegerConformances.swift

@@ -2,7 +2,7 @@
 //
 // This source file is part of the Swift Atomics open source project
 //
-// Copyright (c) 2020 Apple Inc. and the Swift project authors
+// Copyright (c) 2020-2021 Apple Inc. and the Swift project authors
 // Licensed under Apache License v2.0 with Runtime Library Exception
 //
 // See https://swift.org/LICENSE.txt for license information
@@ -20,6 +20,7 @@
 import _AtomicsShims
 
 extension Int: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = Int
 
@@ -512,6 +513,7 @@ extension Int.AtomicRepresentation: AtomicIntegerStorage {
 }
 
 extension Int64: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = Int64
 
@@ -1004,6 +1006,7 @@ extension Int64.AtomicRepresentation: AtomicIntegerStorage {
 }
 
 extension Int32: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = Int32
 
@@ -1496,6 +1499,7 @@ extension Int32.AtomicRepresentation: AtomicIntegerStorage {
 }
 
 extension Int16: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = Int16
 
@@ -1988,6 +1992,7 @@ extension Int16.AtomicRepresentation: AtomicIntegerStorage {
 }
 
 extension Int8: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = Int8
 
@@ -2480,6 +2485,7 @@ extension Int8.AtomicRepresentation: AtomicIntegerStorage {
 }
 
 extension UInt: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = UInt
 
@@ -2972,6 +2978,7 @@ extension UInt.AtomicRepresentation: AtomicIntegerStorage {
 }
 
 extension UInt64: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = UInt64
 
@@ -3464,6 +3471,7 @@ extension UInt64.AtomicRepresentation: AtomicIntegerStorage {
 }
 
 extension UInt32: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = UInt32
 
@@ -3956,6 +3964,7 @@ extension UInt32.AtomicRepresentation: AtomicIntegerStorage {
 }
 
 extension UInt16: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = UInt16
 
@@ -4448,6 +4457,7 @@ extension UInt16.AtomicRepresentation: AtomicIntegerStorage {
 }
 
 extension UInt8: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = UInt8
 
@@ -4943,6 +4953,7 @@ extension UInt8.AtomicRepresentation: AtomicIntegerStorage {
 // on Linux distributions, and we cannot currently enable them automatically.
 #if !(os(Linux) && arch(x86_64)) || ENABLE_DOUBLEWIDE_ATOMICS
 extension DoubleWord: AtomicValue {
+  @frozen
   public struct AtomicRepresentation {
     public typealias Value = DoubleWord