             )!
         
         close(mem_fd)
-        
+
+        if (unsafeBitCast(gpio_map, to: Int.self) == -1) {    //MAP_FAILED not available, but its value is (void*)-1
+            perror("mmap error")
+            abort()
+        }
         gpioBasePointer = gpio_map.assumingMemoryBound(to: UInt.self)
-        if (gpioBasePointer.pointee == UInt(bitPattern: -1)) {    //MAP_FAILED not available, but its value is (void*)-1
-            print("mmap error: " + "\(gpioBasePointer)")
-            abort()
-        }
         
         gpioGetPointer = gpioBasePointer.advanced(by: 13)   // GPLEV0
         gpioSetPointer = gpioBasePointer.advanced(by: 7)    // GPSET0

//
// SwiftyGPIO
//
// Copyright (c) 2016 Umberto Raimondi and contributors.
// Licensed under the MIT license, as follows:
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.)
//

#if os(Linux)
    import Glibc

            off_t(offset)     //Offset to GPIO peripheral
            )!

        if (unsafeBitCast(m, to: Int.self) == -1) {    //MAP_FAILED not available, but its value is (void*)-1
            perror("mmap error")
            abort()
        }
        let pointer = m.assumingMemoryBound(to: UInt.self)

        return pointer
    }

