-{
- // cache the timestamp of the bibliography files.
- static map<FileName, time_t> bibfileStatus;
-
- support::FileNameList const & bibfilesCache = getBibfilesCache();
- // compare the cached timestamps with the actual ones.
- bool changed = false;
- support::FileNameList::const_iterator ei = bibfilesCache.begin();
- support::FileNameList::const_iterator en = bibfilesCache.end();
- for (; ei != en; ++ ei) {
- time_t lastw = ei->lastModified();
- if (lastw != bibfileStatus[*ei]) {
- changed = true;
- bibfileStatus[*ei] = lastw;
- break;
+{
+ if (d->bibinfoCacheValid_) {
+ support::FileNameList const & bibfilesCache = getBibfilesCache();
+ // compare the cached timestamps with the actual ones.
+ support::FileNameList::const_iterator ei = bibfilesCache.begin();
+ support::FileNameList::const_iterator en = bibfilesCache.end();
+ for (; ei != en; ++ ei) {
+ time_t lastw = ei->lastModified();
+ if (lastw != d->bibfileStatus_[*ei]) {
+ d->bibinfoCacheValid_ = false;
+ d->bibfileStatus_[*ei] = lastw;
+ break;
+ }