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|
//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift Atomics open source project
//
// Copyright (c) 2020 - 2023 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
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
%{
from gyb_utils import *
integerTypes = [
# Swift Storage ShimName
("Int8", "_AtomicInt8Storage", "Int8"),
("Int16", "_AtomicInt16Storage", "Int16"),
("Int32", "_AtomicInt32Storage", "Int32"),
("Int64", "_AtomicInt64Storage", "Int64"),
("UInt8", "_AtomicInt8Storage", "Int8"),
("UInt16", "_AtomicInt16Storage", "Int16"),
("UInt32", "_AtomicInt32Storage", "Int32"),
("UInt64", "_AtomicInt64Storage", "Int64"),
("Int", "_AtomicIntStorage", "Int"),
("UInt", "_AtomicIntStorage", "Int"),
("DoubleWord", "_AtomicDoubleWordStorage", "DoubleWord"),
]
}%
${autogenerated_warning()}
#if !ATOMICS_NATIVE_BUILTINS
import _AtomicsShims
#endif
% for (swiftType, storageType, shimType) in integerTypes:
extension ${swiftType}: AtomicValue {
@frozen
public struct AtomicRepresentation {
public typealias Value = ${swiftType}
@usableFromInline
internal typealias _Storage = ${storageType}
@usableFromInline
internal var _storage: _Storage
@_transparent @_alwaysEmitIntoClient
public init(_ value: Value) {
#if ATOMICS_NATIVE_BUILTINS
_storage = Self._encode(value)
#else
_storage = _sa_prepare_${shimType}(Self._encode(value))
#endif
}
@_transparent @_alwaysEmitIntoClient
public func dispose() -> Value {
#if ATOMICS_NATIVE_BUILTINS
return Self._decode(_storage)
#else
return Self._decode(_sa_dispose_${shimType}(_storage))
#endif
}
}
}
extension UnsafeMutablePointer
where Pointee == ${swiftType}.AtomicRepresentation {
@_transparent @_alwaysEmitIntoClient
internal var _extract: UnsafeMutablePointer<Pointee._Storage> {
// `${swiftType}.AtomicRepresentation` is layout-compatible with
// its only stored property.
UnsafeMutableRawPointer(self).assumingMemoryBound(to: Pointee._Storage.self)
}
}
#if ATOMICS_NATIVE_BUILTINS
extension ${swiftType}.AtomicRepresentation {
@_transparent @_alwaysEmitIntoClient
static func _decode(_ storage: _Storage) -> Value {
return Value(storage._value)
}
@_transparent @_alwaysEmitIntoClient
static func _encode(_ value: Value) -> _Storage {
return _Storage(value._value)
}
}
#else
extension ${swiftType}.AtomicRepresentation {
@_transparent @_alwaysEmitIntoClient
static func _decode(_ v: ${shimType}) -> Value {
% if swiftType == shimType:
return v
% else:
return Value(v._value)
% end
}
@_transparent @_alwaysEmitIntoClient
static func _encode(_ value: Value) -> ${shimType} {
% if swiftType == shimType:
return value
% else:
return ${shimType}(value._value)
% end
}
}
#endif
extension ${swiftType}.AtomicRepresentation: AtomicStorage {
@_semantics("atomics.requires_constant_orderings")
@_transparent @_alwaysEmitIntoClient
public static func atomicLoad(
at pointer: UnsafeMutablePointer<Self>,
ordering: AtomicLoadOrdering
) -> ${swiftType} {
let r = pointer._extract._atomicLoad(ordering: ordering)
return Self._decode(r)
}
@_semantics("atomics.requires_constant_orderings")
@_transparent @_alwaysEmitIntoClient
public static func atomicStore(
_ desired: ${swiftType},
at pointer: UnsafeMutablePointer<Self>,
ordering: AtomicStoreOrdering
) {
pointer._extract._atomicStore(
Self._encode(desired),
ordering: ordering)
}
@_semantics("atomics.requires_constant_orderings")
@_transparent @_alwaysEmitIntoClient
public static func atomicExchange(
_ desired: ${swiftType},
at pointer: UnsafeMutablePointer<Self>,
ordering: AtomicUpdateOrdering
) -> ${swiftType} {
let r = pointer._extract._atomicExchange(
Self._encode(desired),
ordering: ordering)
return Self._decode(r)
}
@_semantics("atomics.requires_constant_orderings")
@_transparent @_alwaysEmitIntoClient
public static func atomicCompareExchange(
expected: ${swiftType},
desired: ${swiftType},
at pointer: UnsafeMutablePointer<Self>,
ordering: AtomicUpdateOrdering
) -> (exchanged: Bool, original: ${swiftType}) {
let r = pointer._extract._atomicCompareExchange(
expected: Self._encode(expected),
desired: Self._encode(desired),
ordering: ordering)
return (r.exchanged, Self._decode(r.original))
}
@_semantics("atomics.requires_constant_orderings")
@_transparent @_alwaysEmitIntoClient
public static func atomicCompareExchange(
expected: ${swiftType},
desired: ${swiftType},
at pointer: UnsafeMutablePointer<Self>,
successOrdering: AtomicUpdateOrdering,
failureOrdering: AtomicLoadOrdering
) -> (exchanged: Bool, original: ${swiftType}) {
let r = pointer._extract._atomicCompareExchange(
expected: Self._encode(expected),
desired: Self._encode(desired),
successOrdering: successOrdering,
failureOrdering: failureOrdering)
return (r.exchanged, Self._decode(r.original))
}
@_semantics("atomics.requires_constant_orderings")
@_transparent @_alwaysEmitIntoClient
public static func atomicWeakCompareExchange(
expected: ${swiftType},
desired: ${swiftType},
at pointer: UnsafeMutablePointer<Self>,
successOrdering: AtomicUpdateOrdering,
failureOrdering: AtomicLoadOrdering
) -> (exchanged: Bool, original: ${swiftType}) {
let r = pointer._extract._atomicWeakCompareExchange(
expected: Self._encode(expected),
desired: Self._encode(desired),
successOrdering: successOrdering,
failureOrdering: failureOrdering)
return (r.exchanged, Self._decode(r.original))
}
}
% if swiftType != "DoubleWord":
extension ${swiftType}: AtomicInteger {}
extension ${swiftType}.AtomicRepresentation: AtomicIntegerStorage {
% for (name, cname, op, label, doc) in integerOperations:
% defaultValue = " = 1" if label != "" else ""
@_semantics("atomics.requires_constant_orderings")
@_transparent @_alwaysEmitIntoClient
@discardableResult
public static func atomicLoadThen${name}(
${label} operand: ${swiftType}${defaultValue},
at pointer: UnsafeMutablePointer<Self>,
ordering: AtomicUpdateOrdering
) -> ${swiftType} {
let r = pointer._extract._atomicLoadThen${name}(
${argLabel(label)}Self._encode(operand), ordering: ordering)
return Self._decode(r)
}
% end
}
% end
% end
% end
|
