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// @file pagefault.h
// define this : _PAGEFAULTEXCEPTION
#pragma once
namespace mongo {
class Record;
class PageFaultException /*: public DBException*/ {
unsigned era;
Record *r;
public:
PageFaultException(const PageFaultException& rhs) : era(rhs.era), r(rhs.r) { }
explicit PageFaultException(Record*);
void touch();
};
class PageFaultRetryableSection : boost::noncopyable {
unsigned _laps;
public:
unsigned laps() const { return _laps; }
void didLap() { _laps++; }
PageFaultRetryableSection();
~PageFaultRetryableSection();
};
#if 0
inline void how_to_use_example() {
// ...
{
PageFaultRetryableSection s;
while( 1 ) {
try {
writelock lk; // or readlock
// do work
break;
}
catch( PageFaultException& e ) {
e.touch();
}
}
}
// ...
}
#endif
}
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