func UnmapBuffer(target uint32) bool {
	ret, _, _ := syscall.Syscall(gpUnmapBuffer, 1, uintptr(target), 0, 0)
	return ret != 0
}
func UnmapBuffer(target uint32) bool {
	ret, _, _ := syscall.Syscall(gpUnmapBuffer, 1, uintptr(target), 0, 0)
	return ret != 0
}
func UnmapBuffer ( target uint32 ) bool { ret , _ , _ := syscall . Syscall ( gpUnmapBuffer , 1 , uintptr ( target ) , 0 , 0 ) return ret != 0 }
// release the mapping of a buffer object's data store into the client's address space
release the mapping of a buffer object s data store into the client s address space