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2022-02-27 Fred Gleason <fredg@paravelsystems.com>
* Added an 'RDTimeProbe' class. Signed-off-by: Fred Gleason <fredg@paravelsystems.com>
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104
lib/rdtimeprobe.cpp
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104
lib/rdtimeprobe.cpp
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// rdtimeprobe.cpp
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//
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// Report elapsed times for profiling and optimization
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//
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// (C) Copyright 2022 Fred Gleason <fredg@paravelsystems.com>
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU Library General Public License
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// version 2 as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public
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// License along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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#include "rdtimeprobe.h"
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RDTimeProbeStamp::RDTimeProbeStamp(struct timespec *tp)
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{
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d_timespec=*tp;
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}
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RDTimeProbeStamp::~RDTimeProbeStamp()
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{
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}
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QString RDTimeProbeStamp::toString() const
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{
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QDateTime dt=QDateTime::fromMSecsSinceEpoch(1000*(qint64)d_timespec.tv_sec);
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QString microsec=QString::asprintf(".%06ld",d_timespec.tv_nsec);
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return dt.time().toString("hh:mm:ss")+microsec.left(4);
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}
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double RDTimeProbeStamp::operator-(const RDTimeProbeStamp &other)
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{
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double lhs=(double)d_timespec.tv_sec+(double)d_timespec.tv_nsec/1000000000.0;
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double rhs=(double)other.d_timespec.tv_sec+
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(double)other.d_timespec.tv_nsec/1000000000.0;
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return lhs-rhs;
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}
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RDTimeProbeStamp *RDTimeProbeStamp::currentStamp()
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{
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struct timespec now;
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memset(&now,0,sizeof(now));
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clock_gettime(CLOCK_REALTIME,&now);
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return new RDTimeProbeStamp(&now);
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}
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RDTimeProbe::RDTimeProbe(FILE *out)
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{
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d_current_timestamp=NULL;
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d_output_stream=out;
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fprintf(d_output_stream,
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"================================================================\n");
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fprintf(d_output_stream,"%p: RDTimeProbe created\n",this);
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}
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RDTimeProbe::~RDTimeProbe()
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{
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fprintf(d_output_stream,"%p: RDTimeProbe destroyed\n",this);
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fprintf(d_output_stream,
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"================================================================\n");
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if(d_current_timestamp!=NULL) {
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delete d_current_timestamp;
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}
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}
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void RDTimeProbe::printWaypoint(const QString &label)
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{
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RDTimeProbeStamp *now=RDTimeProbeStamp::currentStamp();
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double diff=0.0;
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if(d_current_timestamp!=NULL) {
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diff=*now-*d_current_timestamp;
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}
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QString diff_str=QString::asprintf("%18.6lf",diff).trimmed();
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fprintf(d_output_stream,"%p : %s [%s] : %s\n",
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this,
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now->toString().toUtf8().constData(),
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diff_str.toUtf8().constData(),
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label.toUtf8().constData());
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delete d_current_timestamp;
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d_current_timestamp=now;
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}
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