Alexandre Lision | 8af73cb | 2013-12-10 14:11:20 -0500 | [diff] [blame] | 1 | /* $Id$ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include <pj/os.h> |
| 21 | #include <pj/compat/high_precision.h> |
| 22 | |
| 23 | #if defined(PJ_HAS_HIGH_RES_TIMER) && PJ_HAS_HIGH_RES_TIMER != 0 |
| 24 | |
| 25 | #define U32MAX (0xFFFFFFFFUL) |
| 26 | #define NANOSEC (1000000000UL) |
| 27 | #define USEC (1000000UL) |
| 28 | #define MSEC (1000) |
| 29 | |
| 30 | #define u64tohighprec(u64) ((pj_highprec_t)((pj_int64_t)(u64))) |
| 31 | |
| 32 | static pj_highprec_t get_elapsed( const pj_timestamp *start, |
| 33 | const pj_timestamp *stop ) |
| 34 | { |
| 35 | #if defined(PJ_HAS_INT64) && PJ_HAS_INT64!=0 |
| 36 | return u64tohighprec(stop->u64 - start->u64); |
| 37 | #else |
| 38 | pj_highprec_t elapsed_hi, elapsed_lo; |
| 39 | |
| 40 | elapsed_hi = stop->u32.hi - start->u32.hi; |
| 41 | elapsed_lo = stop->u32.lo - start->u32.lo; |
| 42 | |
| 43 | /* elapsed_hi = elapsed_hi * U32MAX */ |
| 44 | pj_highprec_mul(elapsed_hi, U32MAX); |
| 45 | |
| 46 | return elapsed_hi + elapsed_lo; |
| 47 | #endif |
| 48 | } |
| 49 | |
| 50 | static pj_highprec_t elapsed_msec( const pj_timestamp *start, |
| 51 | const pj_timestamp *stop ) |
| 52 | { |
| 53 | pj_timestamp ts_freq; |
| 54 | pj_highprec_t freq, elapsed; |
| 55 | |
| 56 | if (pj_get_timestamp_freq(&ts_freq) != PJ_SUCCESS) |
| 57 | return 0; |
| 58 | |
| 59 | /* Convert frequency timestamp */ |
| 60 | #if defined(PJ_HAS_INT64) && PJ_HAS_INT64!=0 |
| 61 | freq = u64tohighprec(ts_freq.u64); |
| 62 | #else |
| 63 | freq = ts_freq.u32.hi; |
| 64 | pj_highprec_mul(freq, U32MAX); |
| 65 | freq += ts_freq.u32.lo; |
| 66 | #endif |
| 67 | |
| 68 | /* Avoid division by zero. */ |
| 69 | if (freq == 0) freq = 1; |
| 70 | |
| 71 | /* Get elapsed time in cycles. */ |
| 72 | elapsed = get_elapsed(start, stop); |
| 73 | |
| 74 | /* usec = elapsed * MSEC / freq */ |
| 75 | pj_highprec_mul(elapsed, MSEC); |
| 76 | pj_highprec_div(elapsed, freq); |
| 77 | |
| 78 | return elapsed; |
| 79 | } |
| 80 | |
| 81 | static pj_highprec_t elapsed_usec( const pj_timestamp *start, |
| 82 | const pj_timestamp *stop ) |
| 83 | { |
| 84 | pj_timestamp ts_freq; |
| 85 | pj_highprec_t freq, elapsed; |
| 86 | |
| 87 | if (pj_get_timestamp_freq(&ts_freq) != PJ_SUCCESS) |
| 88 | return 0; |
| 89 | |
| 90 | /* Convert frequency timestamp */ |
| 91 | #if defined(PJ_HAS_INT64) && PJ_HAS_INT64!=0 |
| 92 | freq = u64tohighprec(ts_freq.u64); |
| 93 | #else |
| 94 | freq = ts_freq.u32.hi; |
| 95 | pj_highprec_mul(freq, U32MAX); |
| 96 | freq += ts_freq.u32.lo; |
| 97 | #endif |
| 98 | |
| 99 | /* Avoid division by zero. */ |
| 100 | if (freq == 0) freq = 1; |
| 101 | |
| 102 | /* Get elapsed time in cycles. */ |
| 103 | elapsed = get_elapsed(start, stop); |
| 104 | |
| 105 | /* usec = elapsed * USEC / freq */ |
| 106 | pj_highprec_mul(elapsed, USEC); |
| 107 | pj_highprec_div(elapsed, freq); |
| 108 | |
| 109 | return elapsed; |
| 110 | } |
| 111 | |
| 112 | PJ_DEF(pj_uint32_t) pj_elapsed_nanosec( const pj_timestamp *start, |
| 113 | const pj_timestamp *stop ) |
| 114 | { |
| 115 | pj_timestamp ts_freq; |
| 116 | pj_highprec_t freq, elapsed; |
| 117 | |
| 118 | if (pj_get_timestamp_freq(&ts_freq) != PJ_SUCCESS) |
| 119 | return 0; |
| 120 | |
| 121 | /* Convert frequency timestamp */ |
| 122 | #if defined(PJ_HAS_INT64) && PJ_HAS_INT64!=0 |
| 123 | freq = u64tohighprec(ts_freq.u64); |
| 124 | #else |
| 125 | freq = ts_freq.u32.hi; |
| 126 | pj_highprec_mul(freq, U32MAX); |
| 127 | freq += ts_freq.u32.lo; |
| 128 | #endif |
| 129 | |
| 130 | /* Avoid division by zero. */ |
| 131 | if (freq == 0) freq = 1; |
| 132 | |
| 133 | /* Get elapsed time in cycles. */ |
| 134 | elapsed = get_elapsed(start, stop); |
| 135 | |
| 136 | /* usec = elapsed * USEC / freq */ |
| 137 | pj_highprec_mul(elapsed, NANOSEC); |
| 138 | pj_highprec_div(elapsed, freq); |
| 139 | |
| 140 | return (pj_uint32_t)elapsed; |
| 141 | } |
| 142 | |
| 143 | PJ_DEF(pj_uint32_t) pj_elapsed_usec( const pj_timestamp *start, |
| 144 | const pj_timestamp *stop ) |
| 145 | { |
| 146 | return (pj_uint32_t)elapsed_usec(start, stop); |
| 147 | } |
| 148 | |
| 149 | PJ_DEF(pj_uint32_t) pj_elapsed_msec( const pj_timestamp *start, |
| 150 | const pj_timestamp *stop ) |
| 151 | { |
| 152 | return (pj_uint32_t)elapsed_msec(start, stop); |
| 153 | } |
| 154 | |
| 155 | PJ_DEF(pj_uint64_t) pj_elapsed_msec64(const pj_timestamp *start, |
| 156 | const pj_timestamp *stop ) |
| 157 | { |
| 158 | return (pj_uint64_t)elapsed_msec(start, stop); |
| 159 | } |
| 160 | |
| 161 | PJ_DEF(pj_time_val) pj_elapsed_time( const pj_timestamp *start, |
| 162 | const pj_timestamp *stop ) |
| 163 | { |
| 164 | pj_highprec_t elapsed = elapsed_msec(start, stop); |
| 165 | pj_time_val tv_elapsed; |
| 166 | |
| 167 | if (PJ_HIGHPREC_VALUE_IS_ZERO(elapsed)) { |
| 168 | tv_elapsed.sec = tv_elapsed.msec = 0; |
| 169 | return tv_elapsed; |
| 170 | } else { |
| 171 | pj_highprec_t sec, msec; |
| 172 | |
| 173 | sec = elapsed; |
| 174 | pj_highprec_div(sec, MSEC); |
| 175 | tv_elapsed.sec = (long)sec; |
| 176 | |
| 177 | msec = elapsed; |
| 178 | pj_highprec_mod(msec, MSEC); |
| 179 | tv_elapsed.msec = (long)msec; |
| 180 | |
| 181 | return tv_elapsed; |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | PJ_DEF(pj_uint32_t) pj_elapsed_cycle( const pj_timestamp *start, |
| 186 | const pj_timestamp *stop ) |
| 187 | { |
| 188 | return stop->u32.lo - start->u32.lo; |
| 189 | } |
| 190 | |
| 191 | PJ_DEF(pj_status_t) pj_gettickcount(pj_time_val *tv) |
| 192 | { |
| 193 | pj_timestamp ts, start; |
| 194 | pj_status_t status; |
| 195 | |
| 196 | if ((status = pj_get_timestamp(&ts)) != PJ_SUCCESS) |
| 197 | return status; |
| 198 | |
| 199 | pj_set_timestamp32(&start, 0, 0); |
| 200 | *tv = pj_elapsed_time(&start, &ts); |
| 201 | |
| 202 | return PJ_SUCCESS; |
| 203 | } |
| 204 | |
| 205 | #endif /* PJ_HAS_HIGH_RES_TIMER */ |
| 206 | |