From f5fcc431a49ff3152fdb4b37b17acfa08c8b1639 Mon Sep 17 00:00:00 2001
From: eap <eap@opencascade.com>
Date: Wed, 11 May 2005 12:34:33 +0000
Subject: [PATCH] IPAL8739. Replace stack with set: assure increasing order or
 released IDs and clearing of ID pool when possible

---
 src/SMDS/SMDS_MeshIDFactory.cxx | 18 +++++++++++++++---
 src/SMDS/SMDS_MeshIDFactory.hxx |  4 ++--
 2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/src/SMDS/SMDS_MeshIDFactory.cxx b/src/SMDS/SMDS_MeshIDFactory.cxx
index 96314592d..74ac917dd 100644
--- a/src/SMDS/SMDS_MeshIDFactory.cxx
+++ b/src/SMDS/SMDS_MeshIDFactory.cxx
@@ -44,8 +44,9 @@ int SMDS_MeshIDFactory::GetFreeID()
 	if (myPoolOfID.empty()) return ++myMaxID;
 	else
 	{
-		int ID = myPoolOfID.top();
-		myPoolOfID.pop();
+                set<int>::iterator i = myPoolOfID.begin();
+		int ID = *i;//myPoolOfID.top();
+		myPoolOfID.erase( i );//myPoolOfID.pop();
 		return ID;
 	}
 }
@@ -56,5 +57,16 @@ int SMDS_MeshIDFactory::GetFreeID()
 //=======================================================================
 void SMDS_MeshIDFactory::ReleaseID(const int ID)
 {
-  if (ID > 0 && ID < myMaxID) myPoolOfID.push(ID);
+  if (ID > 0 && ID < myMaxID) myPoolOfID./*push*/insert(ID);
+  if (ID > 0 && ID == myMaxID ) {
+    set<int>::iterator i = --myPoolOfID.end();
+    while ( i != myPoolOfID.begin() )
+      if ( --myMaxID != *(--i) )
+        break;
+    if ( myMaxID == *i )
+      --myMaxID; // begin of myPoolOfID reached
+    else
+      ++i;
+    myPoolOfID.erase( i, myPoolOfID.end() );
+  }
 }
diff --git a/src/SMDS/SMDS_MeshIDFactory.hxx b/src/SMDS/SMDS_MeshIDFactory.hxx
index 62b2d4c00..8a6425ac2 100644
--- a/src/SMDS/SMDS_MeshIDFactory.hxx
+++ b/src/SMDS/SMDS_MeshIDFactory.hxx
@@ -28,7 +28,7 @@
 #define _SMDS_MeshIDFactory_HeaderFile
 
 #include "SMDS_MeshObject.hxx"
-#include <stack>
+#include <set>
 
 
 class SMDS_MeshIDFactory:public SMDS_MeshObject
@@ -40,7 +40,7 @@ class SMDS_MeshIDFactory:public SMDS_MeshObject
   protected:
 	SMDS_MeshIDFactory();
 	int myMaxID;
-	std::stack<int> myPoolOfID;
+	std::set<int> myPoolOfID;
 };
 
 #endif
-- 
2.39.2