Merge CV, ver=5.1; ops/methods from HV, and interface from CV where possible

[goodguy/history.git] / cinelerra-5.1 / cinelerra / garbage.C

diff --git a/cinelerra-5.1/cinelerra/garbage.C b/cinelerra-5.1/cinelerra/garbage.C
new file mode 100644 (file)
index 0000000..6544735
--- /dev/null
+++ b/cinelerra-5.1/cinelerra/garbage.C
@@ -0,0 +1,150 @@
+
+/*
+ * CINELERRA
+ * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
+ * 
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ * 
+ */
+
+#include "bcsignals.h"
+#include "garbage.h"
+#include "mutex.h"
+
+#include <string.h>
+
+//Garbage *Garbage::garbage = 0;
+
+
+Garbage::Garbage(const char *title)
+{
+//     Garbage::garbage->add_object(this);
+       users = 1;
+       deleted = 0;
+       this->title = new char[strlen(title) + 1];
+       strcpy(this->title, title);
+       lock = new Mutex("Garbage::lock", 1);
+}
+
+Garbage::~Garbage()
+{
+       if(!deleted)
+               printf("Garbage::~Garbage: title=%s users=%d was not deleted by Garbage::remove_user\n", 
+                       title, 
+                       users);
+       delete [] title;
+       delete lock;
+}
+
+
+void Garbage::add_user()
+{
+       lock->lock("Garbage::add_user");
+       users++;
+       lock->unlock();
+}
+
+int Garbage::remove_user()
+{
+       if(!this) return 0;
+
+//printf("Garbage::remove_user %d lock=%p users=%d\n", __LINE__, lock, users);
+       if(users <= 0) {
+               printf("Garbage::remove_user %d users=%d\n", __LINE__, users);
+               return 0;
+       }
+       lock->lock("Garbage::delete_object");
+       if(--users > 0) {
+               lock->unlock();
+               return 1; // still has users
+       }
+       deleted = 1;
+       lock->unlock();
+       delete this; // this is now invalid.
+       return 0;
+}
+
+
+// void GarbageObject::remove_user()
+// {
+//     Garbage::garbage->lock->lock("GarbageObject::add_user");
+//     users--;
+//     if(users < 0) printf("GarbageObject::remove_user: users=%d Should be >= 0.\n", users);
+//     Garbage::garbage->remove_expired();
+// // *this is now invalid
+//     Garbage::garbage->lock->unlock();
+// }
+
+
+
+
+
+// Garbage::Garbage()
+// {
+//     lock = new Mutex("Garbage::lock", 1);
+// }
+// 
+// 
+// Garbage::~Garbage()
+// {
+//     delete lock;
+// }
+// 
+// // void Garbage::add_object(GarbageObject *ptr)
+// // {
+// //  lock->lock("Garbage::add_object");
+// //  objects.append(ptr);
+// //  lock->unlock();
+// // }
+// 
+// void Garbage::delete_object(GarbageObject *ptr)
+// {
+//     if(!ptr) return;
+// 
+//     Garbage *garbage = Garbage::garbage;
+//     garbage->lock->lock("Garbage::delete_object");
+//     ptr->users--;
+//     
+//     if(ptr->users <= 0)
+//     {
+//             ptr->deleted = 1;
+//             delete ptr;
+// 
+// // Remove expired objects here
+// //          remove_expired();
+//     }
+//     garbage->lock->unlock();
+// }
+// 
+// void Garbage::remove_expired()
+// {
+//     Garbage *garbage = Garbage::garbage;
+//     for(int i = 0; i < garbage->objects.total; i++)
+//     {
+//             GarbageObject *ptr = garbage->objects.values[i];
+//             if(ptr->users <= 0 && ptr->deleted)
+//             {
+// // Must remove pointer to prevent recursive deletion of the same object.
+// // But i is still invalid.
+//                     garbage->objects.remove_number(i);
+// 
+//                     delete ptr;
+//                     i--;
+//             }
+//     }
+// }
+
+
+