SGI SI GLU library

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diff --git a/src/glu/sgi/libnurbs/internals/bufpool.h b/src/glu/sgi/libnurbs/internals/bufpool.h
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+/*
+** License Applicability. Except to the extent portions of this file are
+** made subject to an alternative license as permitted in the SGI Free
+** Software License B, Version 1.1 (the "License"), the contents of this
+** file are subject only to the provisions of the License. You may not use
+** this file except in compliance with the License. You may obtain a copy
+** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+**
+** http://oss.sgi.com/projects/FreeB
+**
+** Note that, as provided in the License, the Software is distributed on an
+** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+**
+** Original Code. The Original Code is: OpenGL Sample Implementation,
+** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+** Copyright in any portions created by third parties is as indicated
+** elsewhere herein. All Rights Reserved.
+**
+** Additional Notice Provisions: The application programming interfaces
+** established by SGI in conjunction with the Original Code are The
+** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+** Window System(R) (Version 1.3), released October 19, 1998. This software
+** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+** published by SGI, but has not been independently verified as being
+** compliant with the OpenGL(R) version 1.2.1 Specification.
+*/
+
+/*
+ * bufpool.h
+ *
+ * $Date: 2001/03/17 00:25:40 $ $Revision: 1.1 $
+ * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/bufpool.h,v 1.1 2001/03/17 00:25:40 brianp Exp $
+ */
+
+#ifndef __glubufpool_h_
+#define __glubufpool_h_
+
+#include "myassert.h"
+#include "mystdlib.h"
+
+#define NBLOCKS	32
+
+class Buffer {
+	friend class 	Pool;
+	Buffer	*	next;		/* next buffer on free list	*/
+};
+
+class Pool {
+public:
+			Pool( int, int, char * );
+			~Pool( void );
+    inline void*	new_buffer( void );
+    inline void		free_buffer( void * );
+    void		clear( void );
+    
+private:
+    void		grow( void );
+
+protected:
+    Buffer		*freelist;		/* linked list of free buffers */
+    char		*blocklist[NBLOCKS];	/* blocks of malloced memory */
+    int			nextblock;		/* next free block index */
+    char		*curblock;		/* last malloced block */
+    int			buffersize;		/* bytes per buffer */
+    int			nextsize;		/* size of next block of memory	*/
+    int			nextfree;		/* byte offset past next free buffer */
+    int			initsize;
+    enum Magic { is_allocated = 0xf3a1, is_free = 0xf1a2 };
+    char		*name;			/* name of the pool */
+    Magic		magic;			/* marker for valid pool */
+};
+
+/*-----------------------------------------------------------------------------
+ * Pool::free_buffer - return a buffer to a pool
+ *-----------------------------------------------------------------------------
+ */
+
+inline void
+Pool::free_buffer( void *b )
+{
+    assert( (this != 0) && (magic == is_allocated) );
+
+    /* add buffer to singly connected free list */
+
+    ((Buffer *) b)->next = freelist;
+    freelist = (Buffer *) b;
+}
+
+
+/*-----------------------------------------------------------------------------
+ * Pool::new_buffer - allocate a buffer from a pool
+ *-----------------------------------------------------------------------------
+ */
+
+inline void * 
+Pool::new_buffer( void )
+{
+    void *buffer;
+
+    assert( (this != 0) && (magic == is_allocated) );
+
+    /* find free buffer */
+
+    if( freelist ) {
+    	buffer = (void *) freelist; 
+    	freelist = freelist->next;
+    } else {
+    	if( ! nextfree )
+    	    grow( );
+    	nextfree -= buffersize;;
+    	buffer = (void *) (curblock + nextfree);
+    }
+    return buffer;
+}
+	
+class PooledObj {
+public:
+    inline void *	operator new( size_t, Pool & );
+    inline void * 	operator new( size_t, void *);
+    inline void * 	operator new( size_t s)
+				{ return ::new char[s]; }
+    inline void 	operator delete( void * ) { assert( 0 ); }
+    inline void		deleteMe( Pool & );
+};
+
+inline void *
+PooledObj::operator new( size_t, Pool& pool )
+{
+    return pool.new_buffer();
+}
+
+inline void
+PooledObj::deleteMe( Pool& pool )
+{
+    pool.free_buffer( (void *) this );
+}
+
+#endif /* __glubufpool_h_ */