func FlushMappedNamedBufferRange(buffer uint32, offset int, length int) {
	syscall.Syscall(gpFlushMappedNamedBufferRange, 3, uintptr(buffer), uintptr(offset), uintptr(length))
}
func FlushMappedNamedBufferRange(buffer uint32, offset int, length int) {
	syscall.Syscall(gpFlushMappedNamedBufferRange, 3, uintptr(buffer), uintptr(offset), uintptr(length))
}
func FlushMappedNamedBufferRange ( buffer uint32 , offset int , length int ) { syscall . Syscall ( gpFlushMappedNamedBufferRange , 3 , uintptr ( buffer ) , uintptr ( offset ) , uintptr ( length ) ) }
// indicate modifications to a range of a mapped buffer
indicate modifications to a range of a mapped buffer