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Diffstat (limited to 'src/glu/sgi/libnurbs/internals/bufpool.cc')
| -rw-r--r-- | src/glu/sgi/libnurbs/internals/bufpool.cc | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/src/glu/sgi/libnurbs/internals/bufpool.cc b/src/glu/sgi/libnurbs/internals/bufpool.cc new file mode 100644 index 00000000000..0a77693f443 --- /dev/null +++ b/src/glu/sgi/libnurbs/internals/bufpool.cc @@ -0,0 +1,112 @@ +/* +** 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.c++ + * + * $Date: 2004/05/12 15:29:36 $ $Revision: 1.2 $ + * $Header: /cvs/mesa/Mesa/src/glu/sgi/libnurbs/internals/bufpool.cc,v 1.2 2004/05/12 15:29:36 brianp Exp $ + */ + +#include "glimports.h" +#include "myassert.h" +#include "bufpool.h" + + +/*----------------------------------------------------------------------------- + * Pool - allocate a new pool of buffers + *----------------------------------------------------------------------------- + */ +Pool::Pool( int _buffersize, int initpoolsize, char *n ) +{ + if((unsigned)_buffersize < sizeof(Buffer)) + buffersize = sizeof(Buffer); + else + buffersize = _buffersize; + initsize = initpoolsize * buffersize; + nextsize = initsize; + name = n; + magic = is_allocated; + nextblock = 0; + curblock = 0; + freelist = 0; + nextfree = 0; +} + +/*----------------------------------------------------------------------------- + * ~Pool - free a pool of buffers and the pool itself + *----------------------------------------------------------------------------- + */ + +Pool::~Pool( void ) +{ + assert( (this != 0) && (magic == is_allocated) ); + + while( nextblock ) { + delete [] blocklist[--nextblock]; + blocklist[nextblock] = 0; + } + magic = is_free; +} + + +void Pool::grow( void ) +{ + assert( (this != 0) && (magic == is_allocated) ); + curblock = new char[nextsize]; + blocklist[nextblock++] = curblock; + nextfree = nextsize; + nextsize *= 2; +} + +/*----------------------------------------------------------------------------- + * Pool::clear - free buffers associated with pool but keep pool + *----------------------------------------------------------------------------- + */ + +void +Pool::clear( void ) +{ + assert( (this != 0) && (magic == is_allocated) ); + + while( nextblock ) { + delete [] blocklist[--nextblock]; + blocklist[nextblock] = 0; + } + curblock = 0; + freelist = 0; + nextfree = 0; + if( nextsize > initsize ) + nextsize /= 2; +} |