SwiftPrivateThreadExtras: fix casting due to API changes

compnerd · compnerd · commit 59371dba2410 · 2019-02-13T08:13:47.000-08:00
The recent changes to the UnsafemutablePointer prevented the "abuse" of
the type for casting.  Switch to `unsafeBitCast`.  This should repair
the Windows build.
diff --git a/stdlib/private/SwiftPrivateThreadExtras/SwiftPrivateThreadExtras.swift b/stdlib/private/SwiftPrivateThreadExtras/SwiftPrivateThreadExtras.swift
@@ -96,7 +96,7 @@ public func _stdlib_thread_create_block<Argument, Result>(
   if threadID == 0 {
     return (errno, nil)
   } else {
-    return (0, UnsafeMutablePointer<ThreadHandle>(&threadID).pointee)
+    return (0, unsafeBitCast(threadID, to: ThreadHandle.self))
   }
 #else
   var threadID = _make_pthread_t()

Original file line number	Diff line number	Diff line change
`@@ -96,7 +96,7 @@ public func _stdlib_thread_create_block<Argument, Result>(`
`96`	`96`	`if threadID == 0 {`
`97`	`97`	`return (errno, nil)`
`98`	`98`	`} else {`
`99`		`- return (0, UnsafeMutablePointer<ThreadHandle>(&threadID).pointee)`
	`99`	`+ return (0, unsafeBitCast(threadID, to: ThreadHandle.self))`
`100`	`100`	`}`
`101`	`101`	`#else`
`102`	`102`	`var threadID = _make_pthread_t()`