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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/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#pragma once
#include "mongo/pch.h"
#include <boost/unordered_map.hpp>
#include "mongo/util/concurrency/rwlock.h"
namespace mongo {
class Trace :
public boost::noncopyable {
public:
#ifdef LATER
/**
Set the traces with the given names.
@param name comma separated trace names
*/
static void setTraces(const std::string &names);
#endif
static void setTrace(const std::string &name, unsigned level);
/**
Test to see if the given trace is on or off.
@param name the name of the trace to check
@returns true if the trace is on, false otherwise
*/
static unsigned getTrace(const std::string &name);
private:
Trace();
~Trace();
struct Hash :
std::unary_function<std::string, size_t> {
size_t operator()(const std::string &rS) const;
};
typedef boost::unordered_map<std::string, unsigned, Trace::Hash> MapType;
class NameMap {
public:
NameMap();
MapType traces;
};
static NameMap *pMap; /* used by Trace(), so precedes it */
static SimpleRWLock lock; /* used by Trace(), so precedes it */
static Trace trace;
};
}
/* ======================= PRIVATE IMPLEMENTATIONS ========================== */
namespace mongo {
inline size_t Trace::Hash::operator()(const std::string &rS) const {
size_t seed = 0xf0afbeef;
boost::hash_combine(seed, rS);
return seed;
}
}
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