modules/up/src/Core/sys/Time.cc
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FUNCTIONS
This source file includes following functions.
//
// $Id: Time.cc,v 1.1.1.1 2000/03/10 16:32:20 engin Exp $
//
// system.cc
// Author: Ramesh Govindan <govindan@isi.edu>
//
// Abstracted OS facilities for file system access and
// for communication primitives. This file contains implementations of:
// - network addresses (Address class)
// - OS file descriptors and descriptor sets
// - a common time representation
//
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <cstdio>
#include <cstdlib>
#include <cerrno>
extern "C" {
#if HAVE_UNISTD_H
#include <unistd.h>
#endif // HAVE_UNISTD_H
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
}
#include "gnu/MLCG.h"
#include "gnu/Uniform.h"
#include "util/Types.hh"
#include "util/Trail.hh"
#include "sys/Time.hh"
#include "sched/Dispatcher.hh"
extern "C" {
#ifndef STDC_HEADERS
extern int gettimeofday(...);
#endif // STDC_HEADERS
}
// File local variables
static MLCG *mlcg = NULL;
static Uniform *uniform = NULL;
// Time is internally represented in NTP timestamp format,
// for convenience. A bit of an overkill, perhaps.
// Here, we define two time representations, for time differences
// and absolute time.
//
//
// The following conversion functions and tables have been adapted
// from the xntpd distribution. Their copyrights apply.
//
// Tables to convert from a time stamp fraction to usecs. Note that
// the units of these tables are actually (usec<<3). We carry three
// guard bits so that the result can be properly truncated (or rounded)
// to be correct to the least significant bit.
// These tables are rounded.
static U32 fracToUsecHi[256] = {
0x000000, 0x007a12, 0x00f424, 0x016e36,
0x01e848, 0x02625a, 0x02dc6c, 0x03567e,
0x03d090, 0x044aa2, 0x04c4b4, 0x053ec6,
0x05b8d8, 0x0632ea, 0x06acfc, 0x07270e,
0x07a120, 0x081b32, 0x089544, 0x090f56,
0x098968, 0x0a037a, 0x0a7d8c, 0x0af79e,
0x0b71b0, 0x0bebc2, 0x0c65d4, 0x0cdfe6,
0x0d59f8, 0x0dd40a, 0x0e4e1c, 0x0ec82e,
0x0f4240, 0x0fbc52, 0x103664, 0x10b076,
0x112a88, 0x11a49a, 0x121eac, 0x1298be,
0x1312d0, 0x138ce2, 0x1406f4, 0x148106,
0x14fb18, 0x15752a, 0x15ef3c, 0x16694e,
0x16e360, 0x175d72, 0x17d784, 0x185196,
0x18cba8, 0x1945ba, 0x19bfcc, 0x1a39de,
0x1ab3f0, 0x1b2e02, 0x1ba814, 0x1c2226,
0x1c9c38, 0x1d164a, 0x1d905c, 0x1e0a6e,
0x1e8480, 0x1efe92, 0x1f78a4, 0x1ff2b6,
0x206cc8, 0x20e6da, 0x2160ec, 0x21dafe,
0x225510, 0x22cf22, 0x234934, 0x23c346,
0x243d58, 0x24b76a, 0x25317c, 0x25ab8e,
0x2625a0, 0x269fb2, 0x2719c4, 0x2793d6,
0x280de8, 0x2887fa, 0x29020c, 0x297c1e,
0x29f630, 0x2a7042, 0x2aea54, 0x2b6466,
0x2bde78, 0x2c588a, 0x2cd29c, 0x2d4cae,
0x2dc6c0, 0x2e40d2, 0x2ebae4, 0x2f34f6,
0x2faf08, 0x30291a, 0x30a32c, 0x311d3e,
0x319750, 0x321162, 0x328b74, 0x330586,
0x337f98, 0x33f9aa, 0x3473bc, 0x34edce,
0x3567e0, 0x35e1f2, 0x365c04, 0x36d616,
0x375028, 0x37ca3a, 0x38444c, 0x38be5e,
0x393870, 0x39b282, 0x3a2c94, 0x3aa6a6,
0x3b20b8, 0x3b9aca, 0x3c14dc, 0x3c8eee,
0x3d0900, 0x3d8312, 0x3dfd24, 0x3e7736,
0x3ef148, 0x3f6b5a, 0x3fe56c, 0x405f7e,
0x40d990, 0x4153a2, 0x41cdb4, 0x4247c6,
0x42c1d8, 0x433bea, 0x43b5fc, 0x44300e,
0x44aa20, 0x452432, 0x459e44, 0x461856,
0x469268, 0x470c7a, 0x47868c, 0x48009e,
0x487ab0, 0x48f4c2, 0x496ed4, 0x49e8e6,
0x4a62f8, 0x4add0a, 0x4b571c, 0x4bd12e,
0x4c4b40, 0x4cc552, 0x4d3f64, 0x4db976,
0x4e3388, 0x4ead9a, 0x4f27ac, 0x4fa1be,
0x501bd0, 0x5095e2, 0x510ff4, 0x518a06,
0x520418, 0x527e2a, 0x52f83c, 0x53724e,
0x53ec60, 0x546672, 0x54e084, 0x555a96,
0x55d4a8, 0x564eba, 0x56c8cc, 0x5742de,
0x57bcf0, 0x583702, 0x58b114, 0x592b26,
0x59a538, 0x5a1f4a, 0x5a995c, 0x5b136e,
0x5b8d80, 0x5c0792, 0x5c81a4, 0x5cfbb6,
0x5d75c8, 0x5defda, 0x5e69ec, 0x5ee3fe,
0x5f5e10, 0x5fd822, 0x605234, 0x60cc46,
0x614658, 0x61c06a, 0x623a7c, 0x62b48e,
0x632ea0, 0x63a8b2, 0x6422c4, 0x649cd6,
0x6516e8, 0x6590fa, 0x660b0c, 0x66851e,
0x66ff30, 0x677942, 0x67f354, 0x686d66,
0x68e778, 0x69618a, 0x69db9c, 0x6a55ae,
0x6acfc0, 0x6b49d2, 0x6bc3e4, 0x6c3df6,
0x6cb808, 0x6d321a, 0x6dac2c, 0x6e263e,
0x6ea050, 0x6f1a62, 0x6f9474, 0x700e86,
0x708898, 0x7102aa, 0x717cbc, 0x71f6ce,
0x7270e0, 0x72eaf2, 0x736504, 0x73df16,
0x745928, 0x74d33a, 0x754d4c, 0x75c75e,
0x764170, 0x76bb82, 0x773594, 0x77afa6,
0x7829b8, 0x78a3ca, 0x791ddc, 0x7997ee
};
static U32 fracToUsecMid[256] = {
0x0000, 0x007a, 0x00f4, 0x016e, 0x01e8, 0x0262, 0x02dc, 0x0356,
0x03d1, 0x044b, 0x04c5, 0x053f, 0x05b9, 0x0633, 0x06ad, 0x0727,
0x07a1, 0x081b, 0x0895, 0x090f, 0x0989, 0x0a03, 0x0a7e, 0x0af8,
0x0b72, 0x0bec, 0x0c66, 0x0ce0, 0x0d5a, 0x0dd4, 0x0e4e, 0x0ec8,
0x0f42, 0x0fbc, 0x1036, 0x10b0, 0x112b, 0x11a5, 0x121f, 0x1299,
0x1313, 0x138d, 0x1407, 0x1481, 0x14fb, 0x1575, 0x15ef, 0x1669,
0x16e3, 0x175d, 0x17d8, 0x1852, 0x18cc, 0x1946, 0x19c0, 0x1a3a,
0x1ab4, 0x1b2e, 0x1ba8, 0x1c22, 0x1c9c, 0x1d16, 0x1d90, 0x1e0a,
0x1e84, 0x1eff, 0x1f79, 0x1ff3, 0x206d, 0x20e7, 0x2161, 0x21db,
0x2255, 0x22cf, 0x2349, 0x23c3, 0x243d, 0x24b7, 0x2531, 0x25ac,
0x2626, 0x26a0, 0x271a, 0x2794, 0x280e, 0x2888, 0x2902, 0x297c,
0x29f6, 0x2a70, 0x2aea, 0x2b64, 0x2bde, 0x2c59, 0x2cd3, 0x2d4d,
0x2dc7, 0x2e41, 0x2ebb, 0x2f35, 0x2faf, 0x3029, 0x30a3, 0x311d,
0x3197, 0x3211, 0x328b, 0x3306, 0x3380, 0x33fa, 0x3474, 0x34ee,
0x3568, 0x35e2, 0x365c, 0x36d6, 0x3750, 0x37ca, 0x3844, 0x38be,
0x3938, 0x39b3, 0x3a2d, 0x3aa7, 0x3b21, 0x3b9b, 0x3c15, 0x3c8f,
0x3d09, 0x3d83, 0x3dfd, 0x3e77, 0x3ef1, 0x3f6b, 0x3fe5, 0x405f,
0x40da, 0x4154, 0x41ce, 0x4248, 0x42c2, 0x433c, 0x43b6, 0x4430,
0x44aa, 0x4524, 0x459e, 0x4618, 0x4692, 0x470c, 0x4787, 0x4801,
0x487b, 0x48f5, 0x496f, 0x49e9, 0x4a63, 0x4add, 0x4b57, 0x4bd1,
0x4c4b, 0x4cc5, 0x4d3f, 0x4db9, 0x4e34, 0x4eae, 0x4f28, 0x4fa2,
0x501c, 0x5096, 0x5110, 0x518a, 0x5204, 0x527e, 0x52f8, 0x5372,
0x53ec, 0x5466, 0x54e1, 0x555b, 0x55d5, 0x564f, 0x56c9, 0x5743,
0x57bd, 0x5837, 0x58b1, 0x592b, 0x59a5, 0x5a1f, 0x5a99, 0x5b13,
0x5b8d, 0x5c08, 0x5c82, 0x5cfc, 0x5d76, 0x5df0, 0x5e6a, 0x5ee4,
0x5f5e, 0x5fd8, 0x6052, 0x60cc, 0x6146, 0x61c0, 0x623a, 0x62b5,
0x632f, 0x63a9, 0x6423, 0x649d, 0x6517, 0x6591, 0x660b, 0x6685,
0x66ff, 0x6779, 0x67f3, 0x686d, 0x68e7, 0x6962, 0x69dc, 0x6a56,
0x6ad0, 0x6b4a, 0x6bc4, 0x6c3e, 0x6cb8, 0x6d32, 0x6dac, 0x6e26,
0x6ea0, 0x6f1a, 0x6f94, 0x700f, 0x7089, 0x7103, 0x717d, 0x71f7,
0x7271, 0x72eb, 0x7365, 0x73df, 0x7459, 0x74d3, 0x754d, 0x75c7,
0x7641, 0x76bc, 0x7736, 0x77b0, 0x782a, 0x78a4, 0x791e, 0x7998
};
static U32 fracToUsecLo[128] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0a, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e,
0x1f, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25,
0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d,
0x2e, 0x2f, 0x30, 0x31, 0x32, 0x33, 0x33, 0x34,
0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c,
0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42, 0x43, 0x44,
0x45, 0x46, 0x47, 0x48, 0x48, 0x49, 0x4a, 0x4b,
0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x52, 0x53,
0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5b,
0x5c, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62,
0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a,
0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x71,
0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79
};
// Tables to calculate time stamp fractions from usecs. The entries
// in these tables are offset into using each of the two low order
// bytes plus the next 4 bits in a usec value (from a struct timeval).
// These are summed to produce the time stamp fraction.
// Note that these tables are rounded (not truncated) to the nearest
// low order bit in the fraction. The timestamp computed should be
// +- 1.5 low order bits.
static U32 usecToFracLo[256] = {
0x00000000, 0x000010c7, 0x0000218e, 0x00003255,
0x0000431c, 0x000053e3, 0x000064aa, 0x00007571,
0x00008638, 0x000096ff, 0x0000a7c6, 0x0000b88d,
0x0000c954, 0x0000da1b, 0x0000eae2, 0x0000fba9,
0x00010c6f, 0x00011d36, 0x00012dfd, 0x00013ec4,
0x00014f8b, 0x00016052, 0x00017119, 0x000181e0,
0x000192a7, 0x0001a36e, 0x0001b435, 0x0001c4fc,
0x0001d5c3, 0x0001e68a, 0x0001f751, 0x00020818,
0x000218df, 0x000229a6, 0x00023a6d, 0x00024b34,
0x00025bfb, 0x00026cc2, 0x00027d89, 0x00028e50,
0x00029f17, 0x0002afde, 0x0002c0a5, 0x0002d16c,
0x0002e233, 0x0002f2fa, 0x000303c0, 0x00031487,
0x0003254e, 0x00033615, 0x000346dc, 0x000357a3,
0x0003686a, 0x00037931, 0x000389f8, 0x00039abf,
0x0003ab86, 0x0003bc4d, 0x0003cd14, 0x0003dddb,
0x0003eea2, 0x0003ff69, 0x00041030, 0x000420f7,
0x000431be, 0x00044285, 0x0004534c, 0x00046413,
0x000474da, 0x000485a1, 0x00049668, 0x0004a72f,
0x0004b7f6, 0x0004c8bd, 0x0004d984, 0x0004ea4b,
0x0004fb12, 0x00050bd8, 0x00051c9f, 0x00052d66,
0x00053e2d, 0x00054ef4, 0x00055fbb, 0x00057082,
0x00058149, 0x00059210, 0x0005a2d7, 0x0005b39e,
0x0005c465, 0x0005d52c, 0x0005e5f3, 0x0005f6ba,
0x00060781, 0x00061848, 0x0006290f, 0x000639d6,
0x00064a9d, 0x00065b64, 0x00066c2b, 0x00067cf2,
0x00068db9, 0x00069e80, 0x0006af47, 0x0006c00e,
0x0006d0d5, 0x0006e19c, 0x0006f263, 0x00070329,
0x000713f0, 0x000724b7, 0x0007357e, 0x00074645,
0x0007570c, 0x000767d3, 0x0007789a, 0x00078961,
0x00079a28, 0x0007aaef, 0x0007bbb6, 0x0007cc7d,
0x0007dd44, 0x0007ee0b, 0x0007fed2, 0x00080f99,
0x00082060, 0x00083127, 0x000841ee, 0x000852b5,
0x0008637c, 0x00087443, 0x0008850a, 0x000895d1,
0x0008a698, 0x0008b75f, 0x0008c826, 0x0008d8ed,
0x0008e9b4, 0x0008fa7b, 0x00090b41, 0x00091c08,
0x00092ccf, 0x00093d96, 0x00094e5d, 0x00095f24,
0x00096feb, 0x000980b2, 0x00099179, 0x0009a240,
0x0009b307, 0x0009c3ce, 0x0009d495, 0x0009e55c,
0x0009f623, 0x000a06ea, 0x000a17b1, 0x000a2878,
0x000a393f, 0x000a4a06, 0x000a5acd, 0x000a6b94,
0x000a7c5b, 0x000a8d22, 0x000a9de9, 0x000aaeb0,
0x000abf77, 0x000ad03e, 0x000ae105, 0x000af1cc,
0x000b0292, 0x000b1359, 0x000b2420, 0x000b34e7,
0x000b45ae, 0x000b5675, 0x000b673c, 0x000b7803,
0x000b88ca, 0x000b9991, 0x000baa58, 0x000bbb1f,
0x000bcbe6, 0x000bdcad, 0x000bed74, 0x000bfe3b,
0x000c0f02, 0x000c1fc9, 0x000c3090, 0x000c4157,
0x000c521e, 0x000c62e5, 0x000c73ac, 0x000c8473,
0x000c953a, 0x000ca601, 0x000cb6c8, 0x000cc78f,
0x000cd856, 0x000ce91d, 0x000cf9e4, 0x000d0aaa,
0x000d1b71, 0x000d2c38, 0x000d3cff, 0x000d4dc6,
0x000d5e8d, 0x000d6f54, 0x000d801b, 0x000d90e2,
0x000da1a9, 0x000db270, 0x000dc337, 0x000dd3fe,
0x000de4c5, 0x000df58c, 0x000e0653, 0x000e171a,
0x000e27e1, 0x000e38a8, 0x000e496f, 0x000e5a36,
0x000e6afd, 0x000e7bc4, 0x000e8c8b, 0x000e9d52,
0x000eae19, 0x000ebee0, 0x000ecfa7, 0x000ee06e,
0x000ef135, 0x000f01fb, 0x000f12c2, 0x000f2389,
0x000f3450, 0x000f4517, 0x000f55de, 0x000f66a5,
0x000f776c, 0x000f8833, 0x000f98fa, 0x000fa9c1,
0x000fba88, 0x000fcb4f, 0x000fdc16, 0x000fecdd,
0x000ffda4, 0x00100e6b, 0x00101f32, 0x00102ff9,
0x001040c0, 0x00105187, 0x0010624e, 0x00107315,
0x001083dc, 0x001094a3, 0x0010a56a, 0x0010b631,
};
static U32 usecToFracMid[256] = {
0x00000000, 0x0010c6f8, 0x00218def, 0x003254e7,
0x00431bde, 0x0053e2d6, 0x0064a9ce, 0x007570c5,
0x008637bd, 0x0096feb4, 0x00a7c5ac, 0x00b88ca4,
0x00c9539b, 0x00da1a93, 0x00eae18a, 0x00fba882,
0x010c6f7a, 0x011d3671, 0x012dfd69, 0x013ec460,
0x014f8b58, 0x01605250, 0x01711947, 0x0181e03f,
0x0192a736, 0x01a36e2e, 0x01b43526, 0x01c4fc1d,
0x01d5c315, 0x01e68a0c, 0x01f75104, 0x020817fc,
0x0218def3, 0x0229a5eb, 0x023a6ce3, 0x024b33da,
0x025bfad2, 0x026cc1c9, 0x027d88c1, 0x028e4fb9,
0x029f16b0, 0x02afdda8, 0x02c0a49f, 0x02d16b97,
0x02e2328f, 0x02f2f986, 0x0303c07e, 0x03148775,
0x03254e6d, 0x03361565, 0x0346dc5c, 0x0357a354,
0x03686a4b, 0x03793143, 0x0389f83b, 0x039abf32,
0x03ab862a, 0x03bc4d21, 0x03cd1419, 0x03dddb11,
0x03eea208, 0x03ff6900, 0x04102ff7, 0x0420f6ef,
0x0431bde7, 0x044284de, 0x04534bd6, 0x046412cd,
0x0474d9c5, 0x0485a0bd, 0x049667b4, 0x04a72eac,
0x04b7f5a3, 0x04c8bc9b, 0x04d98393, 0x04ea4a8a,
0x04fb1182, 0x050bd879, 0x051c9f71, 0x052d6669,
0x053e2d60, 0x054ef458, 0x055fbb4f, 0x05708247,
0x0581493f, 0x05921036, 0x05a2d72e, 0x05b39e25,
0x05c4651d, 0x05d52c15, 0x05e5f30c, 0x05f6ba04,
0x060780fb, 0x061847f3, 0x06290eeb, 0x0639d5e2,
0x064a9cda, 0x065b63d2, 0x066c2ac9, 0x067cf1c1,
0x068db8b8, 0x069e7fb0, 0x06af46a8, 0x06c00d9f,
0x06d0d497, 0x06e19b8e, 0x06f26286, 0x0703297e,
0x0713f075, 0x0724b76d, 0x07357e64, 0x0746455c,
0x07570c54, 0x0767d34b, 0x07789a43, 0x0789613a,
0x079a2832, 0x07aaef2a, 0x07bbb621, 0x07cc7d19,
0x07dd4410, 0x07ee0b08, 0x07fed200, 0x080f98f7,
0x08205fef, 0x083126e6, 0x0841edde, 0x0852b4d6,
0x08637bcd, 0x087442c5, 0x088509bc, 0x0895d0b4,
0x08a697ac, 0x08b75ea3, 0x08c8259b, 0x08d8ec92,
0x08e9b38a, 0x08fa7a82, 0x090b4179, 0x091c0871,
0x092ccf68, 0x093d9660, 0x094e5d58, 0x095f244f,
0x096feb47, 0x0980b23e, 0x09917936, 0x09a2402e,
0x09b30725, 0x09c3ce1d, 0x09d49514, 0x09e55c0c,
0x09f62304, 0x0a06e9fb, 0x0a17b0f3, 0x0a2877ea,
0x0a393ee2, 0x0a4a05da, 0x0a5accd1, 0x0a6b93c9,
0x0a7c5ac1, 0x0a8d21b8, 0x0a9de8b0, 0x0aaeafa7,
0x0abf769f, 0x0ad03d97, 0x0ae1048e, 0x0af1cb86,
0x0b02927d, 0x0b135975, 0x0b24206d, 0x0b34e764,
0x0b45ae5c, 0x0b567553, 0x0b673c4b, 0x0b780343,
0x0b88ca3a, 0x0b999132, 0x0baa5829, 0x0bbb1f21,
0x0bcbe619, 0x0bdcad10, 0x0bed7408, 0x0bfe3aff,
0x0c0f01f7, 0x0c1fc8ef, 0x0c308fe6, 0x0c4156de,
0x0c521dd5, 0x0c62e4cd, 0x0c73abc5, 0x0c8472bc,
0x0c9539b4, 0x0ca600ab, 0x0cb6c7a3, 0x0cc78e9b,
0x0cd85592, 0x0ce91c8a, 0x0cf9e381, 0x0d0aaa79,
0x0d1b7171, 0x0d2c3868, 0x0d3cff60, 0x0d4dc657,
0x0d5e8d4f, 0x0d6f5447, 0x0d801b3e, 0x0d90e236,
0x0da1a92d, 0x0db27025, 0x0dc3371d, 0x0dd3fe14,
0x0de4c50c, 0x0df58c03, 0x0e0652fb, 0x0e1719f3,
0x0e27e0ea, 0x0e38a7e2, 0x0e496ed9, 0x0e5a35d1,
0x0e6afcc9, 0x0e7bc3c0, 0x0e8c8ab8, 0x0e9d51b0,
0x0eae18a7, 0x0ebedf9f, 0x0ecfa696, 0x0ee06d8e,
0x0ef13486, 0x0f01fb7d, 0x0f12c275, 0x0f23896c,
0x0f345064, 0x0f45175c, 0x0f55de53, 0x0f66a54b,
0x0f776c42, 0x0f88333a, 0x0f98fa32, 0x0fa9c129,
0x0fba8821, 0x0fcb4f18, 0x0fdc1610, 0x0fecdd08,
0x0ffda3ff, 0x100e6af7, 0x101f31ee, 0x102ff8e6,
0x1040bfde, 0x105186d5, 0x10624dcd, 0x107314c4,
0x1083dbbc, 0x1094a2b4, 0x10a569ab, 0x10b630a3,
};
static U32 usecToFracHi[16] = {
0x00000000, 0x10c6f79a, 0x218def35, 0x3254e6cf,
0x431bde6a, 0x53e2d604, 0x64a9cd9f, 0x7570c539,
0x8637bcd3, 0x96feb46e, 0xa7c5ac08, 0xb88ca3a3,
0xc9539b3d, 0xda1a92d7, 0xeae18a72, 0xfba8820c,
};
TimeShort::TimeShort()
{
time = 0;
}
TimeShort::TimeShort(U32 t)
{
time = t;
}
TimeShort::TimeShort(U16 i, U16 f)
{
time = i;
time <<= 16;
time |= f;
}
U16
TimeShort::seconds()
{
return (U16) (time >> 16);
}
U16
TimeShort::fraction()
{
return (U16) (time & 0xffff);
}
void
TimeShort::set(U16 i, U16 f)
{
time = i;
time <<= 16;
time |= f;
}
void
TimeShort::set(U32 usecs)
{
U64 t;
t = (U64) ((usecs) / 1000000);
t <<= 32;
usecs = usecs % 1000000;
t += (U64) (usecToFracLo[usecs & 0xff]
+ usecToFracMid[(usecs >> 8) & 0xff]
+ usecToFracHi[(usecs >> 16) & 0xf]);
time = (U32) ((t >> 16) & 0xffffffff);
}
TimeLong
TimeShort::lengthen()
{
U64 t;
t = time;
t <<= 16;
return TimeLong(t);
}
void
TimeShort::randomize()
{
if (uniform == NULL) {
mlcg = new MLCG(dispatcher.systemClock.seconds(),
dispatcher.systemClock.fraction());
uniform = new Uniform(0, 1, mlcg);
}
time = (int) ((*uniform)() * (double) time);
}
U32
TimeShort::usecs()
{
U32 t;
U32 f;
t = seconds() * 1000000;
f = fraction() << 16;
t += (fracToUsecHi[(f >> 24) & 0xff]
+ fracToUsecMid[(f >> 16) & 0xff]
+ fracToUsecLo[(f >> 9) & 0x7f]
+ 0x4) >> 3;
return t;
}
U32
TimeShort::get() const
{
return time;
}
TimeLong::TimeLong()
{
time = 0; // Uninitialized timer
}
TimeLong::TimeLong(U64 t)
{
time = t;
}
TimeLong::TimeLong(U32 i, U32 f)
{
time = i;
time <<= 32;
time |= f;
}
TimeShort
TimeLong::operator-(TimeLong y)
{
U64 t;
t = (time > y.time) ? (time - y.time) : 0;
return TimeShort((U16) ((t >> 32) & 0xffff),
(U16) ((t >> 16) & 0xffff));
}
TimeLong
TimeLong::operator+(TimeShort y)
{
U64 t;
t = y.time;
t <<= 16;
return TimeLong(time + t);
}
void
TimeLong::sync()
{
U32 seconds;
U32 fraction;
struct timeval tv;
(void) gettimeofday(&tv, NULL);
seconds = tv.tv_sec;
fraction = usecToFracLo[tv.tv_usec & 0xff]
+ usecToFracMid[(tv.tv_usec >> 8) & 0xff]
+ usecToFracHi[(tv.tv_usec >> 16) & 0xf];
time = seconds;
time <<= 32;
time += fraction;
}
U32
TimeLong::seconds()
{
return (time >> 32) & 0xffffffff;
}
U32
TimeLong::fraction()
{
return time & 0xffffffff;
}
U64
TimeLong::get() const
{
return time;
}
void
TimeLong::set(U32 secs,
U32 frac)
{
time = secs;
time <<= 32;
time += frac;
}
void
TimeLong::systemTime(struct timeval *tv)
{
tv->tv_sec = seconds();
tv->tv_usec = (fracToUsecHi[(fraction() >> 24) & 0xff]
+ fracToUsecMid[(fraction() >> 16) & 0xff]
+ fracToUsecLo[(fraction() >> 9) & 0x7f]
+ 0x4) >> 3;
}
//
// Copyright (c) 1994 by the University of Southern California.
// All rights reserved.
//
// Permission to use, copy, modify, and distribute this software and
// its documentation in source and binary forms for lawful
// non-commercial purposes and without fee is hereby granted, provided
// that the above copyright notice appear in all copies and that both
// the copyright notice and this permission notice appear in supporting
// documentation, and that any documentation, advertising materials,
// and other materials related to such distribution and use acknowledge
// that the software was developed by the University of Southern
// California and/or Information Sciences Institute.
// The name of the University of Southern California may not
// be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THE UNIVERSITY OF SOUTHERN CALIFORNIA DOES NOT MAKE ANY REPRESENTATIONS
// ABOUT THE SUITABILITY OF THIS SOFTWARE FOR ANY PURPOSE. THIS SOFTWARE IS
// PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
// INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND
// NON-INFRINGEMENT.
//
// IN NO EVENT SHALL USC, OR ANY OTHER CONTRIBUTOR BE LIABLE FOR ANY
// SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT,
// TORT, OR OTHER FORM OF ACTION, ARISING OUT OF OR IN CONNECTION WITH,
// THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// Questions concerning this software should be directed to
// info-ra@isi.edu.
//