Open Radar

 
Summary:
When using the OSAtomic functions, I expect to be able to write code that uses output pointers as follows:

var count: CInt = 0
OSAtomicIncrement(&count) // Convert to CMutablePointer<CInt>

However, since the generated(?) Swift bridge definitions make use of UnsafePointer<T>, the calling code instead is:

var count: Int32 = 0
withUnsafePointer(&count, OSAtomicIncrement32)

This seems unnecessary. The reason for this conclusion is because the objc runtime has bridge definitions which are typed as CMutablePointer<CType>, and do allow code to be called as shown in the first example above.

Steps to Reproduce:
1. Install Xcode6-Beta
2. Create a New Swift File
3. Add the following code:

import Darwin

func foo() {
  var count: Int32 = 0
  OSAtomicIncrement32(&count)
}

Expected Results:
The above code is expected to compile and run properly.

Actual Results:
Compiler error: inout Int32' is not convertible to 'UnsafePointer<Int32>'

Version:
Version 6.0 (6A215l)