Created
June 17, 2018 04:06
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How to call Swift functions by address
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| func helloWorld(a: Int) { | |
| print("Hello world!", 1) | |
| } | |
| // Converting to an address: | |
| // - Erase the type to an Object so swift doesn't complain | |
| // - Bitcast | |
| var erasedFunc = helloWorld as AnyObject | |
| let address = unsafeBitCast(erasedFunc, to: Int.self) | |
| // Next get a Pointer, which is callable in other contexts | |
| let funcPtr = UnsafePointer<Any>.init(bitPattern: address) | |
| // To call in Swift, simply cast back to the original type | |
| let castedFunc = unsafeBitCast(funcPtr, to: AnyObject.self) | |
| let cb = castedFunc as? ((Int) -> Void) | |
| cb!(1) |
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