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/**
* Copyright (c) 2012 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "mongo/util/trace.h"
namespace mongo {
/* the singleton static instance of this object */
Trace::NameMap *Trace::pMap = NULL;
SimpleRWLock Trace::lock("Trace");
Trace Trace::trace;
Trace::NameMap::NameMap():
traces() {
}
Trace::Trace() {
/*
This static singleton is constructed at program load time, so the
lock should not be necessary here.
*/
Trace::pMap = new NameMap();
}
Trace::~Trace() {
delete Trace::pMap;
}
void Trace::setTrace(const string &name, unsigned level) {
SimpleRWLock::Exclusive xlock(Trace::lock); // dtor unlocks
/* if the new level is to be zero, we're going to remove the entry */
if (level == 0) {
Trace::pMap->traces.erase(name);
return;
}
/* try to insert the new trace */
std::pair<MapType::iterator, bool> i(
Trace::pMap->traces.insert(
MapType::value_type(name, level)));
/*
If the insert didn't take place, there was already an entry for
that name. Set it to have the new level.
*/
if (!i.second) {
(*i.first).second = level;
}
}
#ifdef LATER
void Trace::setTraces(const string &names) {
/* create a new map, and replace the existing one */
NameMap *pM;
verify(false);
}
#endif
unsigned Trace::getTrace(const string &name) {
SimpleRWLock::Shared slock(Trace::lock); // dtor unlocks
/* quickest check for no active traces */
if (Trace::pMap->traces.empty())
return 0;
/* there are traces, so look up by name */
MapType::const_iterator i(Trace::pMap->traces.find(name));
if (i == Trace::pMap->traces.end())
return 0;
return (*i).second;
}
}
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