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Try again to fix memory leak reported by Scott.

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This time, use a shared_ptr.
This commit is contained in:
Richard Kimberly Heck 2020-02-23 16:39:00 -05:00
parent 72c581ebdb
commit 0daceae649
2 changed files with 15 additions and 12 deletions
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24
src/Buffer.cpp
View File

@ -154,7 +154,8 @@ typedef vector<LabelInfo> LabelCache;
typedef map<docstring, Buffer::References> RefCache;
// A storehouse for the cloned buffers.
std::list<CloneList *> cloned_buffers;
typedef list<CloneList_ptr> CloneStore;
CloneStore cloned_buffers;
} // namespace
@ -371,7 +372,7 @@ public:
/// This one is useful for preview detached in a thread.
Buffer const * cloned_buffer_;
///
CloneList * clone_list_;
CloneList_ptr clone_list_;
/// are we in the process of exporting this buffer?
mutable bool doing_export;
@ -530,8 +531,8 @@ Buffer::~Buffer()
// loop over children
for (auto const & p : d->children_positions) {
Buffer * child = const_cast<Buffer *>(p.first);
if (d->clone_list_->erase(child))
delete child;
if (d->clone_list_->erase(child))
delete child;
}
// if we're the master buffer, then we should get rid of the list
// of clones
@ -540,14 +541,15 @@ Buffer::~Buffer()
// children still has a reference to this list. But we will try to
// continue, rather than shut down.
LATTEST(d->clone_list_->empty());
list<CloneList *>::iterator it =
// The clone list itself is empty, but it's still referenced in our list
// of clones. So let's find it and remove it.
CloneStore::iterator it =
find(cloned_buffers.begin(), cloned_buffers.end(), d->clone_list_);
if (it == cloned_buffers.end()) {
// We will leak in this case, but it is safe to continue.
LATTEST(false);
} else
cloned_buffers.erase(it);
delete d->clone_list_;
}
// FIXME Do we really need to do this right before we delete d?
// clear references to children in macro tables
@ -594,8 +596,8 @@ Buffer::~Buffer()
Buffer * Buffer::cloneWithChildren() const
{
BufferMap bufmap;
cloned_buffers.push_back(new CloneList);
CloneList * clones = cloned_buffers.back();
cloned_buffers.push_back(CloneList_ptr(new CloneList));
CloneList_ptr clones = cloned_buffers.back();
cloneWithChildren(bufmap, clones);
@ -608,7 +610,7 @@ Buffer * Buffer::cloneWithChildren() const
}
void Buffer::cloneWithChildren(BufferMap & bufmap, CloneList * clones) const
void Buffer::cloneWithChildren(BufferMap & bufmap, CloneList_ptr clones) const
{
// have we already been cloned?
if (bufmap.find(this) != bufmap.end())
@ -658,8 +660,8 @@ void Buffer::cloneWithChildren(BufferMap & bufmap, CloneList * clones) const
Buffer * Buffer::cloneBufferOnly() const {
cloned_buffers.push_back(new CloneList);
CloneList * clones = cloned_buffers.back();
cloned_buffers.push_back(CloneList_ptr(new CloneList));
CloneList_ptr clones = cloned_buffers.back();
Buffer * buffer_clone = new Buffer(fileName().absFileName(), false, this);
// The clone needs its own DocumentClass, since running updateBuffer() will

3
src/Buffer.h
View File

@ -82,6 +82,7 @@ class Buffer;
typedef std::list<Buffer *> ListOfBuffers;
/// a list of Buffers we cloned
typedef std::set<Buffer *> CloneList;
typedef std::shared_ptr<CloneList> CloneList_ptr;
/** The buffer object.
@ -231,7 +232,7 @@ private:
///
typedef std::map<Buffer const *, Buffer *> BufferMap;
///
void cloneWithChildren(BufferMap &, CloneList *) const;
void cloneWithChildren(BufferMap &, CloneList_ptr) const;
/// save checksum of the given file.
void saveCheckSum() const;
/// read a new file