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//===--- SwiftPrivateLibcExtras.swift -------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 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
//
//===----------------------------------------------------------------------===//
import SwiftPrivate
#if canImport(Darwin)
import Darwin
#elseif canImport(Glibc)
import Glibc
#elseif canImport(Musl)
import Musl
#elseif canImport(Android)
import Android
#elseif os(WASI)
import WASILibc
#elseif os(Windows)
import CRT
#endif
public func _stdlib_mkstemps(_ template: inout String, _ suffixlen: CInt) -> CInt {
#if os(Android) || os(Haiku) || os(Windows) || os(WASI)
preconditionFailure("mkstemps doesn't work on your platform")
#else
var utf8CStr = template.utf8CString
let (fd, fileName) = utf8CStr.withUnsafeMutableBufferPointer {
(utf8CStr) -> (CInt, String) in
let fd = mkstemps(utf8CStr.baseAddress!, suffixlen)
let fileName = String(cString: utf8CStr.baseAddress!)
return (fd, fileName)
}
template = fileName
return fd
#endif
}
#if !os(Windows)
public var _stdlib_FD_SETSIZE: CInt {
return 1024
}
public struct _stdlib_fd_set {
var _data: [UInt]
static var _wordBits: Int {
return MemoryLayout<UInt>.size * 8
}
public init() {
_data = [UInt](
repeating: 0,
count: Int(_stdlib_FD_SETSIZE) / _stdlib_fd_set._wordBits)
}
public func isset(_ fd: CInt) -> Bool {
let fdInt = Int(fd)
return (
_data[fdInt / _stdlib_fd_set._wordBits] &
UInt(1 << (fdInt % _stdlib_fd_set._wordBits))
) != 0
}
public mutating func set(_ fd: CInt) {
let fdInt = Int(fd)
_data[fdInt / _stdlib_fd_set._wordBits] |=
UInt(1 << (fdInt % _stdlib_fd_set._wordBits))
}
public mutating func clear(_ fd: CInt) {
let fdInt = Int(fd)
_data[fdInt / _stdlib_fd_set._wordBits] &=
~UInt(1 << (fdInt % _stdlib_fd_set._wordBits))
}
public mutating func zero() {
let count = _data.count
return _data.withUnsafeMutableBufferPointer {
(_data) in
for i in 0..<count {
_data[i] = 0
}
return
}
}
}
public func _stdlib_select(
_ readfds: inout _stdlib_fd_set, _ writefds: inout _stdlib_fd_set,
_ errorfds: inout _stdlib_fd_set, _ timeout: UnsafeMutablePointer<timeval>?
) -> CInt {
return readfds._data.withUnsafeMutableBufferPointer {
(readfds) in
writefds._data.withUnsafeMutableBufferPointer {
(writefds) in
errorfds._data.withUnsafeMutableBufferPointer {
(errorfds) in
let readAddr = readfds.baseAddress
let writeAddr = writefds.baseAddress
let errorAddr = errorfds.baseAddress
#if os(Cygwin)
typealias fd_set = _types_fd_set
#endif
func asFdSetPtr(
_ p: UnsafeMutablePointer<UInt>?
) -> UnsafeMutablePointer<fd_set>? {
return UnsafeMutableRawPointer(p)?
.assumingMemoryBound(to: fd_set.self)
}
return select(
_stdlib_FD_SETSIZE,
asFdSetPtr(readAddr),
asFdSetPtr(writeAddr),
asFdSetPtr(errorAddr),
timeout)
}
}
}
}
#endif
/// Swift-y wrapper around pipe(2)
public func _stdlib_pipe() -> (readEnd: CInt, writeEnd: CInt, error: CInt) {
var fds: [CInt] = [0, 0]
let ret = fds.withUnsafeMutableBufferPointer { unsafeFds -> CInt in
#if os(Windows)
return _pipe(unsafeFds.baseAddress, 0, 0)
#elseif os(WASI)
preconditionFailure("No pipes available on WebAssembly/WASI")
#else
return pipe(unsafeFds.baseAddress!)
#endif
}
return (readEnd: fds[0], writeEnd: fds[1], error: ret)
}
#if !os(Windows)
//
// Functions missing in `Darwin` module.
//
public func _WSTATUS(_ status: CInt) -> CInt {
return status & 0x7f
}
public var _WSTOPPED: CInt {
return 0x7f
}
public func WIFEXITED(_ status: CInt) -> Bool {
return _WSTATUS(status) == 0
}
public func WIFSIGNALED(_ status: CInt) -> Bool {
return _WSTATUS(status) != _WSTOPPED && _WSTATUS(status) != 0
}
public func WEXITSTATUS(_ status: CInt) -> CInt {
return (status >> 8) & 0xff
}
public func WTERMSIG(_ status: CInt) -> CInt {
return _WSTATUS(status)
}
#endif
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