svn merge ^/branches/released . --username marha

1 files changed, 141 insertions, 0 deletions

diff --git a/mesalib/src/glu/sgi/libnurbs/internals/bufpool.h b/mesalib/src/glu/sgi/libnurbs/internals/bufpool.h
new file mode 100644
index 000000000..0fa943375
--- /dev/null
+++ b/mesalib/src/glu/sgi/libnurbs/internals/bufpool.h
@@ -0,0 +1,141 @@
+/*
+ * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
+ * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice including the dates of first publication and
+ * either this permission notice or a reference to
+ * http://oss.sgi.com/projects/FreeB/
+ * shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+ * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Silicon Graphics, Inc.
+ * shall not be used in advertising or otherwise to promote the sale, use or
+ * other dealings in this Software without prior written authorization from
+ * Silicon Graphics, Inc.
+ */
+
+/*
+ * bufpool.h
+ *
+ */
+
+#ifndef __glubufpool_h_
+#define __glubufpool_h_
+
+#include "gluos.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, const 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 };
+    const 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         operator delete( void *, Pool & ) { 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_ */