Use a few shared_ptrs to make things slightly neater.

git-svn-id: svn://localhost/ardour2/branches/3.0@11156 d708f5d6-7413-0410-9779-e7cbd77b26cf

3 files changed, 46 insertions, 54 deletions

diff --git a/libs/ardour/ardour/playlist.h b/libs/ardour/ardour/playlist.h
index 626df720bd..022fdb3ccb 100644
--- a/libs/ardour/ardour/playlist.h
+++ b/libs/ardour/ardour/playlist.h
@@ -151,11 +151,11 @@ public:
 
 	const RegionListProperty& region_list () const { return regions; }
 
-	RegionList*                regions_at (framepos_t frame);
+	boost::shared_ptr<RegionList> regions_at (framepos_t frame);
 	uint32_t                   count_regions_at (framepos_t) const;
 	uint32_t                   count_joined_regions () const;
-	RegionList*                regions_touched (framepos_t start, framepos_t end);
-	RegionList*                regions_to_read (framepos_t start, framepos_t end);
+	boost::shared_ptr<RegionList> regions_touched (framepos_t start, framepos_t end);
+	boost::shared_ptr<RegionList> regions_to_read (framepos_t start, framepos_t end);
 	uint32_t                   region_use_count (boost::shared_ptr<Region>) const;
 	boost::shared_ptr<Region>  find_region (const PBD::ID&) const;
 	boost::shared_ptr<Region>  top_region_at (framepos_t frame);
@@ -340,7 +340,6 @@ public:
 	bool add_region_internal (boost::shared_ptr<Region>, framepos_t position);
 
 	int remove_region_internal (boost::shared_ptr<Region>);
-	RegionList *find_regions_at (framepos_t);
 	void copy_regions (RegionList&) const;
 	void partition_internal (framepos_t start, framepos_t end, bool cutting, RegionList& thawlist);
 
@@ -382,6 +381,7 @@ public:
 private:
 
 	void setup_layering_indices (RegionList const &) const;
+	boost::shared_ptr<RegionList> find_regions_at (framepos_t);
 };
 
 } /* namespace ARDOUR */
diff --git a/libs/ardour/audio_playlist.cc b/libs/ardour/audio_playlist.cc
index fca042e2c5..56f2c4fe83 100644
--- a/libs/ardour/audio_playlist.cc
+++ b/libs/ardour/audio_playlist.cc
@@ -289,10 +289,9 @@ AudioPlaylist::read (Sample *buf, Sample *mixdown_buffer, float *gain_buffer, fr
 
 	framepos_t const end = start + cnt - 1;
 
-	RegionList* rlist = regions_to_read (start, start+cnt);
+	boost::shared_ptr<RegionList> rlist = regions_to_read (start, start+cnt);
 
 	if (rlist->empty()) {
-		delete rlist;
 		return cnt;
 	}
 
@@ -353,7 +352,6 @@ AudioPlaylist::read (Sample *buf, Sample *mixdown_buffer, float *gain_buffer, fr
 		}
 	}
 
-	delete rlist;
 	return ret;
 }
 
@@ -492,7 +490,7 @@ AudioPlaylist::check_dependents (boost::shared_ptr<Region> r, bool norefresh)
 	boost::shared_ptr<AudioRegion> top;
 	boost::shared_ptr<AudioRegion> bottom;
 	boost::shared_ptr<Crossfade>   xfade;
-	RegionList*  touched_regions = 0;
+	boost::shared_ptr<RegionList> touched_regions;
 
 	if (in_set_state || in_partition) {
 		return;
@@ -543,8 +541,7 @@ AudioPlaylist::check_dependents (boost::shared_ptr<Region> r, bool norefresh)
 
 		OverlapType c = top->coverage (bottom->position(), bottom->last_frame());
 
-		delete touched_regions;
-		touched_regions = 0;
+		touched_regions.reset ();
 
 		try {
 			framecnt_t xfade_length;
@@ -657,8 +654,6 @@ AudioPlaylist::check_dependents (boost::shared_ptr<Region> r, bool norefresh)
 		}
 
 	}
-
-	delete touched_regions;
 }
 
 void
diff --git a/libs/ardour/playlist.cc b/libs/ardour/playlist.cc
index bcc203694e..bc11b863eb 100644
--- a/libs/ardour/playlist.cc
+++ b/libs/ardour/playlist.cc
@@ -1634,13 +1634,12 @@ Playlist::flush_notifications (bool from_undo)
   FINDING THINGS
   **********************************************************************/
 
- Playlist::RegionList *
- Playlist::regions_at (framepos_t frame)
-
- {
-	 RegionLock rlock (this);
-	 return find_regions_at (frame);
- }
+boost::shared_ptr<Playlist::RegionList>
+Playlist::regions_at (framepos_t frame)
+{
+	RegionLock rlock (this);
+	return find_regions_at (frame);
+}
 
  uint32_t
  Playlist::count_regions_at (framepos_t frame) const
@@ -1662,7 +1661,7 @@ Playlist::flush_notifications (bool from_undo)
 
  {
 	 RegionLock rlock (this);
-	 RegionList *rlist = find_regions_at (frame);
+	 boost::shared_ptr<RegionList> rlist = find_regions_at (frame);
 	 boost::shared_ptr<Region> region;
 
 	 if (rlist->size()) {
@@ -1671,7 +1670,6 @@ Playlist::flush_notifications (bool from_undo)
 		 region = rlist->back();
 	 }
 
-	 delete rlist;
 	 return region;
  }
 
@@ -1680,7 +1678,7 @@ Playlist::flush_notifications (bool from_undo)
 
  {
 	 RegionLock rlock (this);
-	 RegionList *rlist = find_regions_at (frame);
+	 boost::shared_ptr<RegionList> rlist = find_regions_at (frame);
 
 	 for (RegionList::iterator i = rlist->begin(); i != rlist->end(); ) {
 
@@ -1702,13 +1700,12 @@ Playlist::flush_notifications (bool from_undo)
 		 region = rlist->back();
 	 }
 
-	 delete rlist;
 	 return region;
  }
 
- Playlist::RegionList*
- Playlist::regions_to_read (framepos_t start, framepos_t end)
- {
+boost::shared_ptr<Playlist::RegionList>
+Playlist::regions_to_read (framepos_t start, framepos_t end)
+{
 	 /* Caller must hold lock */
 
 	 RegionList covering;
@@ -1772,7 +1769,7 @@ Playlist::flush_notifications (bool from_undo)
 		 }
 	 }
 
-	 RegionList* rlist = new RegionList;
+	 boost::shared_ptr<RegionList> rlist (new RegionList);
 
 	 /* find all the regions that cover each position .... */
 
@@ -1841,36 +1838,36 @@ Playlist::flush_notifications (bool from_undo)
 	 return rlist;
  }
 
- Playlist::RegionList *
- Playlist::find_regions_at (framepos_t frame)
- {
-	 /* Caller must hold lock */
-
-	 RegionList *rlist = new RegionList;
-
-	 for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
-		 if ((*i)->covers (frame)) {
-			 rlist->push_back (*i);
-		 }
-	 }
-
-	 return rlist;
- }
-
- Playlist::RegionList *
- Playlist::regions_touched (framepos_t start, framepos_t end)
- {
-	 RegionLock rlock (this);
-	 RegionList *rlist = new RegionList;
+boost::shared_ptr<Playlist::RegionList>
+Playlist::find_regions_at (framepos_t frame)
+{
+	/* Caller must hold lock */
+	
+	boost::shared_ptr<RegionList> rlist (new RegionList);
 
-	 for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
-		 if ((*i)->coverage (start, end) != OverlapNone) {
-			 rlist->push_back (*i);
-		 }
-	 }
+	for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
+		if ((*i)->covers (frame)) {
+			rlist->push_back (*i);
+		}
+	}
+	
+	return rlist;
+}
 
+boost::shared_ptr<Playlist::RegionList>
+Playlist::regions_touched (framepos_t start, framepos_t end)
+{
+	RegionLock rlock (this);
+	boost::shared_ptr<RegionList> rlist (new RegionList);
+	
+	for (RegionList::iterator i = regions.begin(); i != regions.end(); ++i) {
+		if ((*i)->coverage (start, end) != OverlapNone) {
+			rlist->push_back (*i);
+		}
+	}
+	
 	 return rlist;
- }
+}
 
  framepos_t
  Playlist::find_next_transient (framepos_t from, int dir)