diff options
Diffstat (limited to 'pjlib/src/pj/os_timestamp_common.c')
| -rw-r--r-- | pjlib/src/pj/os_timestamp_common.c | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/pjlib/src/pj/os_timestamp_common.c b/pjlib/src/pj/os_timestamp_common.c new file mode 100644 index 0000000..af5e493 --- /dev/null +++ b/pjlib/src/pj/os_timestamp_common.c @@ -0,0 +1,206 @@ +/* $Id: os_timestamp_common.c 3553 2011-05-05 06:14:19Z nanang $ */ +/* + * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) + * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <pj/os.h> +#include <pj/compat/high_precision.h> + +#if defined(PJ_HAS_HIGH_RES_TIMER) && PJ_HAS_HIGH_RES_TIMER != 0 + +#define U32MAX (0xFFFFFFFFUL) +#define NANOSEC (1000000000UL) +#define USEC (1000000UL) +#define MSEC (1000) + +#define u64tohighprec(u64) ((pj_highprec_t)((pj_int64_t)(u64))) + +static pj_highprec_t get_elapsed( const pj_timestamp *start, + const pj_timestamp *stop ) +{ +#if defined(PJ_HAS_INT64) && PJ_HAS_INT64!=0 + return u64tohighprec(stop->u64 - start->u64); +#else + pj_highprec_t elapsed_hi, elapsed_lo; + + elapsed_hi = stop->u32.hi - start->u32.hi; + elapsed_lo = stop->u32.lo - start->u32.lo; + + /* elapsed_hi = elapsed_hi * U32MAX */ + pj_highprec_mul(elapsed_hi, U32MAX); + + return elapsed_hi + elapsed_lo; +#endif +} + +static pj_highprec_t elapsed_msec( const pj_timestamp *start, + const pj_timestamp *stop ) +{ + pj_timestamp ts_freq; + pj_highprec_t freq, elapsed; + + if (pj_get_timestamp_freq(&ts_freq) != PJ_SUCCESS) + return 0; + + /* Convert frequency timestamp */ +#if defined(PJ_HAS_INT64) && PJ_HAS_INT64!=0 + freq = u64tohighprec(ts_freq.u64); +#else + freq = ts_freq.u32.hi; + pj_highprec_mul(freq, U32MAX); + freq += ts_freq.u32.lo; +#endif + + /* Avoid division by zero. */ + if (freq == 0) freq = 1; + + /* Get elapsed time in cycles. */ + elapsed = get_elapsed(start, stop); + + /* usec = elapsed * MSEC / freq */ + pj_highprec_mul(elapsed, MSEC); + pj_highprec_div(elapsed, freq); + + return elapsed; +} + +static pj_highprec_t elapsed_usec( const pj_timestamp *start, + const pj_timestamp *stop ) +{ + pj_timestamp ts_freq; + pj_highprec_t freq, elapsed; + + if (pj_get_timestamp_freq(&ts_freq) != PJ_SUCCESS) + return 0; + + /* Convert frequency timestamp */ +#if defined(PJ_HAS_INT64) && PJ_HAS_INT64!=0 + freq = u64tohighprec(ts_freq.u64); +#else + freq = ts_freq.u32.hi; + pj_highprec_mul(freq, U32MAX); + freq += ts_freq.u32.lo; +#endif + + /* Avoid division by zero. */ + if (freq == 0) freq = 1; + + /* Get elapsed time in cycles. */ + elapsed = get_elapsed(start, stop); + + /* usec = elapsed * USEC / freq */ + pj_highprec_mul(elapsed, USEC); + pj_highprec_div(elapsed, freq); + + return elapsed; +} + +PJ_DEF(pj_uint32_t) pj_elapsed_nanosec( const pj_timestamp *start, + const pj_timestamp *stop ) +{ + pj_timestamp ts_freq; + pj_highprec_t freq, elapsed; + + if (pj_get_timestamp_freq(&ts_freq) != PJ_SUCCESS) + return 0; + + /* Convert frequency timestamp */ +#if defined(PJ_HAS_INT64) && PJ_HAS_INT64!=0 + freq = u64tohighprec(ts_freq.u64); +#else + freq = ts_freq.u32.hi; + pj_highprec_mul(freq, U32MAX); + freq += ts_freq.u32.lo; +#endif + + /* Avoid division by zero. */ + if (freq == 0) freq = 1; + + /* Get elapsed time in cycles. */ + elapsed = get_elapsed(start, stop); + + /* usec = elapsed * USEC / freq */ + pj_highprec_mul(elapsed, NANOSEC); + pj_highprec_div(elapsed, freq); + + return (pj_uint32_t)elapsed; +} + +PJ_DEF(pj_uint32_t) pj_elapsed_usec( const pj_timestamp *start, + const pj_timestamp *stop ) +{ + return (pj_uint32_t)elapsed_usec(start, stop); +} + +PJ_DEF(pj_uint32_t) pj_elapsed_msec( const pj_timestamp *start, + const pj_timestamp *stop ) +{ + return (pj_uint32_t)elapsed_msec(start, stop); +} + +PJ_DEF(pj_uint64_t) pj_elapsed_msec64(const pj_timestamp *start, + const pj_timestamp *stop ) +{ + return (pj_uint64_t)elapsed_msec(start, stop); +} + +PJ_DEF(pj_time_val) pj_elapsed_time( const pj_timestamp *start, + const pj_timestamp *stop ) +{ + pj_highprec_t elapsed = elapsed_msec(start, stop); + pj_time_val tv_elapsed; + + if (PJ_HIGHPREC_VALUE_IS_ZERO(elapsed)) { + tv_elapsed.sec = tv_elapsed.msec = 0; + return tv_elapsed; + } else { + pj_highprec_t sec, msec; + + sec = elapsed; + pj_highprec_div(sec, MSEC); + tv_elapsed.sec = (long)sec; + + msec = elapsed; + pj_highprec_mod(msec, MSEC); + tv_elapsed.msec = (long)msec; + + return tv_elapsed; + } +} + +PJ_DEF(pj_uint32_t) pj_elapsed_cycle( const pj_timestamp *start, + const pj_timestamp *stop ) +{ + return stop->u32.lo - start->u32.lo; +} + +PJ_DEF(pj_status_t) pj_gettickcount(pj_time_val *tv) +{ + pj_timestamp ts, start; + pj_status_t status; + + if ((status = pj_get_timestamp(&ts)) != PJ_SUCCESS) + return status; + + pj_set_timestamp32(&start, 0, 0); + *tv = pj_elapsed_time(&start, &ts); + + return PJ_SUCCESS; +} + +#endif /* PJ_HAS_HIGH_RES_TIMER */ + |