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f5cf3705d5
Without this, you get crashes in a few second when you set the autosave interval to one second and edit quickly (typing new words etc). The reason is that the cloned buffer wants to insert words into the word list and remove them again, but it lives in a different thread.
141 lines
3.0 KiB
C++
141 lines
3.0 KiB
C++
/**
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* \file WordList.cpp
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Stefan Schimanski
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*
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* Full author contact details are available in file CREDITS.
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*/
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#include <config.h>
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#include "WordList.h"
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#include "support/convert.h"
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#include "support/debug.h"
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#include "support/docstring.h"
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#include "support/lassert.h"
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#include "support/weighted_btree.h"
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#include <QThreadStorage>
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#include <map>
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using namespace std;
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namespace lyx {
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///
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typedef map<string, WordList *> GlobalWordList;
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// Each thread uses its own word list, but only the one of the GUI thread is
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// used to do real work. The others are only neded to prevent simultanous
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// write access e.g. from a cloned buffer and a true document buffer.
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QThreadStorage<GlobalWordList *> theGlobalWordList;
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WordList * theWordList(string const & lang)
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{
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if (!theGlobalWordList.hasLocalData())
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theGlobalWordList.setLocalData(new GlobalWordList);
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GlobalWordList * globalWordList = theGlobalWordList.localData();
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GlobalWordList::iterator it = globalWordList->find(lang);
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if (it != globalWordList->end())
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return it->second;
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else {
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WordList * wl = new WordList;
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(*globalWordList)[lang] = wl;
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return wl;
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}
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}
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void WordList::cleanupWordLists()
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{
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if (!theGlobalWordList.hasLocalData())
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return;
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GlobalWordList * globalWordList = theGlobalWordList.localData();
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GlobalWordList::const_iterator it = globalWordList->begin();
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for (; it != globalWordList->end(); ++it)
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delete it->second;
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globalWordList->clear();
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}
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///
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struct WordList::Impl {
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///
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size_t c_;
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///
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typedef stx::weighted_btree<docstring, size_t, int> Words;
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///
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Words words_;
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};
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WordList::WordList()
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{
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d = new Impl;
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d->c_ = 0;
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#if 0
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for (size_t i = 1000000; i > 0; --i) {
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d->words_.insert("a" + convert<docstring>(i), size_t(1), stx::Void());
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}
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#endif
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}
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WordList::~WordList()
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{
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delete d;
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}
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docstring const & WordList::word(size_t idx) const
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{
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Impl::Words::const_iterator it = d->words_.find_summed_weight(idx);
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LASSERT(it != d->words_.end(), { static docstring dummy; return dummy; });
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// We use the key() method here, and not something like it->first
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// because the btree only returns (iterator-) temporary value pairs.
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// If we returned the first component of those here, we get an
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// invalid reference and therefore strange crashes.
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return it.key();
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}
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size_t WordList::size() const
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{
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return d->words_.summed_weight();
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}
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void WordList::insert(docstring const & w)
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{
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Impl::Words::iterator it = d->words_.find(w);
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if (it == d->words_.end())
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d->words_.insert(w, size_t(1), 1);
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else {
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it.data()++;
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d->words_.change_weight(it, 1);
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}
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}
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void WordList::remove(docstring const & w)
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{
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Impl::Words::iterator it = d->words_.find(w);
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if (it != d->words_.end()) {
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it.data()--;
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d->words_.change_weight(it, 0);
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// We will not erase here, but instead we just leave it
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// in the btree with weight 0. This avoid too much
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// reorganisation of the tree all the time.
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//if (it.data() == 0)
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// d->words_.erase(w);
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}
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}
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} // namespace lyx
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