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2fc5cbdc14
This replaces swiftMSVCRT with swiftCRT. The big difference here is that the `visualc` module is no longer imported nor exported. The `visualc` module remains in use for a singular test wrt availability, but this should effectively remove the need for the `visualc` module. The difference between the MSVCRT and ucrt module was not well understood by most. MSVCRT provided ucrt AND visualc, combining pieces of the old MSVCRT and the newer ucrt. The ucrt module is what you really wanted most of the time, however, would need to use MSVCRT for the convenience aliases for type-generic math and the deprecated math constants. Unfortunately, we cannot shadow the `ucrt` module and create a Swift SDK overlay for ucrt as that seems to result in circular dependencies when processing the `_Concurrency` module. Although this makes using the C library easier for most people, it has a more important subtle change: it cleaves the dependency on visualc. This means that this enables use of Swift without Visual Studio for the singular purpose of providing 3 header files. Additionally, it removes the need for the installation of 2 of the 4 support files. This greatly simplifies the deployment process on Windows.
54 lines
1.6 KiB
Swift
54 lines
1.6 KiB
Swift
//===--- SymbolLookup.swift -----------------------------------------------===//
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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 - 2019 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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#if canImport(Darwin)
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import Darwin
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#elseif canImport(Glibc)
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import Glibc
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#elseif os(Windows)
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import CRT
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import WinSDK
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#else
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#error("Unsupported platform")
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#endif
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#if canImport(Darwin) || os(OpenBSD)
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let RTLD_DEFAULT = UnsafeMutableRawPointer(bitPattern: -2)
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#elseif os(Linux)
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let RTLD_DEFAULT = UnsafeMutableRawPointer(bitPattern: 0)
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#elseif os(Android)
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#if arch(arm) || arch(i386)
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let RTLD_DEFAULT = UnsafeMutableRawPointer(bitPattern: 0xffffffff as UInt)
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#elseif arch(arm64) || arch(x86_64)
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let RTLD_DEFAULT = UnsafeMutableRawPointer(bitPattern: 0)
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#else
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#error("Unsupported platform")
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#endif
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#elseif os(Windows)
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let hStdlibCore: HMODULE = GetModuleHandleA("swiftCore.dll")!
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#elseif os(WASI)
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// WASI doesn't support dynamic linking yet.
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#else
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#error("Unsupported platform")
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#endif
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public func pointerToSwiftCoreSymbol(name: String) -> UnsafeMutableRawPointer? {
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#if os(Windows)
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return unsafeBitCast(GetProcAddress(hStdlibCore, name),
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to: UnsafeMutableRawPointer?.self)
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#elseif os(WASI)
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fatalError("\(#function) is not supported on WebAssembly/WASI")
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#else
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return dlsym(RTLD_DEFAULT, name)
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#endif
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}
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