1 # /* Copyright (C) 2002 2 # * Housemarque Oy 3 # * http://www.housemarque.com 4 # * 5 # * Distributed under the Boost Software License, Version 1.0. (See 6 # * accompanying file LICENSE_1_0.txt or copy at 7 # * http://www.boost.org/LICENSE_1_0.txt) 8 # */ 9 # 10 # /* Revised by Paul Mensonides (2002) */ 11 # 12 # /* See http://www.boost.org for most recent version. */ 13 # 14 # /* The time complexity of DELAY(N) is O(2^N). 15 # * 16 # * Handy when recompiles are too fast to take a coffee break. :) 17 # * 18 # * Template metaprogramming can be used for implementing similar 19 # * delays. Unfortunately template instantiation consumes memory, 20 # * therefore compilers usually fail to fully compile long template 21 # * based delays, because they run out of memory. 22 # * 23 # * On many compilers (e.g. g++, MSVC++), this macro takes only a 24 # * small amount of memory to preprocess. On some compilers (e.g. 25 # * MWCW), however, this macro seems to consume huge amounts of 26 # * memory. 27 # */ 28 # 29 # include <boost/preprocessor/arithmetic/dec.hpp> 30 # include <boost/preprocessor/cat.hpp> 31 # include <boost/preprocessor/control/while.hpp> 32 # include <boost/preprocessor/facilities/empty.hpp> 33 # include <boost/preprocessor/tuple/elem.hpp> 34 # 35 # ifndef DELAY_MAX 36 # define DELAY_MAX 14 37 # endif 38 # 39 # define DELAY(N) BOOST_PP_TUPLE_ELEM(2, 0, (BOOST_PP_EMPTY, BOOST_PP_WHILE(DELAY_C, BOOST_PP_CAT(DELAY_F, N), BOOST_PP_DEC(N))))() 40 # 41 # define DELAY_C(D, N) N 42 # 43 # define DELAY_F0(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 44 # define DELAY_F1(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 45 # define DELAY_F2(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 46 # define DELAY_F3(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 47 # define DELAY_F4(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 48 # define DELAY_F5(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 49 # define DELAY_F6(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 50 # define DELAY_F7(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 51 # define DELAY_F8(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 52 # define DELAY_F9(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 53 # define DELAY_F10(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 54 # define DELAY_F11(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 55 # define DELAY_F12(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 56 # define DELAY_F13(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 57 # define DELAY_F14(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 58 # define DELAY_F15(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 59 # define DELAY_F16(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 60 # define DELAY_F17(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 61 # define DELAY_F18(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 62 # define DELAY_F19(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 63 # define DELAY_F20(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 64 # define DELAY_F21(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 65 # define DELAY_F22(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 66 # define DELAY_F23(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 67 # define DELAY_F24(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 68 # define DELAY_F25(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 69 # define DELAY_F26(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 70 # define DELAY_F27(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 71 # define DELAY_F28(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 72 # define DELAY_F29(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 73 # define DELAY_F30(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 74 # define DELAY_F31(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 75 # define DELAY_F32(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 76 # define DELAY_F33(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 77 # define DELAY_F34(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 78 # define DELAY_F35(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 79 # define DELAY_F36(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 80 # define DELAY_F37(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 81 # define DELAY_F38(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 82 # define DELAY_F39(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 83 # define DELAY_F40(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 84 # define DELAY_F41(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 85 # define DELAY_F42(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 86 # define DELAY_F43(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 87 # define DELAY_F44(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 88 # define DELAY_F45(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 89 # define DELAY_F46(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 90 # define DELAY_F47(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 91 # define DELAY_F48(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 92 # define DELAY_F49(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 93 # define DELAY_F50(D, N) BOOST_PP_IF(1, BOOST_PP_DEC(N), BOOST_PP_WHILE_ ## D(DELAY_C, DELAY_F ## N, BOOST_PP_DEC(N))) 94 95 DELAY(DELAY_MAX) 96