180 lines
4.5 KiB
C
180 lines
4.5 KiB
C
/*-
|
|
* Copyright (c) 2014 Poul-Henning Kamp
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* Simulated timebase
|
|
* ==================
|
|
*
|
|
* Very simple minded: Time advances when TB_Sleep() is called only.
|
|
*
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "ntimed.h"
|
|
|
|
static struct timestamp st_now;
|
|
|
|
static double freq = 0;
|
|
static double freq0 = 0;
|
|
|
|
static double adj_offset = 0;
|
|
static double adj_duration = 0;
|
|
static double adj_freq = 0;
|
|
|
|
/*
|
|
* This variable is public and represent the amount of time the simulated
|
|
* clock has been tweaked by the TB_Step() and TB_Adjust() functions.
|
|
*
|
|
* This can be used to "(re-)model" previously recorded event series
|
|
* onto the ST timebase.
|
|
*/
|
|
|
|
double Time_Sim_delta = 0;
|
|
|
|
/**********************************************************************/
|
|
|
|
static struct timestamp *
|
|
st_Now(struct timestamp *storage)
|
|
{
|
|
if (storage == NULL)
|
|
ALLOC_OBJ(storage, TIMESTAMP_MAGIC);
|
|
AN(storage);
|
|
*storage = st_now;
|
|
return (storage);
|
|
}
|
|
|
|
/**********************************************************************/
|
|
|
|
static int
|
|
st_Sleep(double dur)
|
|
{
|
|
|
|
TS_Add(&st_now, dur);
|
|
Time_Sim_delta += dur * freq;
|
|
return (0);
|
|
}
|
|
|
|
/**********************************************************************/
|
|
|
|
static void __match_proto__(tb_step_f)
|
|
st_Step(struct ocx *ocx, double offset)
|
|
{
|
|
|
|
Debug(ocx, "SIMSTEP %.3e\n", offset);
|
|
Time_Sim_delta += offset;
|
|
TB_generation++;
|
|
}
|
|
|
|
/**********************************************************************/
|
|
|
|
static void __match_proto__(tb_adjust_f)
|
|
st_Adjust(struct ocx *ocx, double offset, double duration, double frequency)
|
|
{
|
|
|
|
(void)ocx;
|
|
adj_offset = offset;
|
|
adj_duration = floor(duration);
|
|
if (adj_offset > 0.0 && adj_duration == 0.0)
|
|
adj_duration = 1.0;
|
|
adj_freq = frequency;
|
|
}
|
|
|
|
/**********************************************************************/
|
|
|
|
static enum todo_e __match_proto__(todo_f)
|
|
st_kern_pll(struct ocx *ocx, struct todolist *tdl, void *priv)
|
|
{
|
|
double d;
|
|
|
|
(void)ocx;
|
|
AN(tdl);
|
|
AZ(priv);
|
|
freq = freq0 + adj_freq;
|
|
if (adj_duration > 0.0) {
|
|
d = adj_offset / adj_duration;
|
|
freq += d;
|
|
adj_offset -= d;
|
|
adj_duration -= 1.0;
|
|
}
|
|
Put(ocx, OCX_TRACE, "SIMPLL %.3e %.3e %.3e\n",
|
|
adj_freq, adj_offset, adj_duration);
|
|
return (TODO_OK);
|
|
}
|
|
|
|
/**********************************************************************
|
|
* Mechanism to artificially bump simulated clock around.
|
|
*/
|
|
|
|
struct st_bump {
|
|
unsigned magic;
|
|
#define ST_BUMP_MAGIC 0xc8981be3
|
|
double bfreq;
|
|
double bphase;
|
|
};
|
|
|
|
static enum todo_e __match_proto__(todo_f)
|
|
st_kern_bump(struct ocx *ocx, struct todolist *tdl, void *priv)
|
|
{
|
|
struct st_bump *stb;
|
|
|
|
(void)ocx;
|
|
(void)tdl;
|
|
CAST_OBJ_NOTNULL(stb, priv, ST_BUMP_MAGIC);
|
|
|
|
freq0 += stb->bfreq;
|
|
Time_Sim_delta += stb->bphase;
|
|
FREE_OBJ(stb);
|
|
return (TODO_OK);
|
|
}
|
|
|
|
void
|
|
Time_Sim_Bump(struct todolist *tdl, double when, double bfreq, double bphase)
|
|
{
|
|
struct st_bump *stb;
|
|
|
|
ALLOC_OBJ(stb, ST_BUMP_MAGIC);
|
|
AN(stb);
|
|
stb->bfreq = bfreq;
|
|
stb->bphase = bphase;
|
|
(void)TODO_ScheduleRel(tdl, st_kern_bump, stb, when, 0.0, "BUMP");
|
|
}
|
|
|
|
/**********************************************************************/
|
|
|
|
void
|
|
Time_Sim(struct todolist *tdl)
|
|
{
|
|
|
|
INIT_OBJ(&st_now, TIMESTAMP_MAGIC);
|
|
TS_Add(&st_now, 1e6);
|
|
TB_Now = st_Now;
|
|
TB_Sleep = st_Sleep;
|
|
TB_Step = st_Step;
|
|
TB_Adjust = st_Adjust;
|
|
(void)TODO_ScheduleRel(tdl, st_kern_pll, NULL, 0.0, 1.0, "SIMPLL");
|
|
}
|