| 1 | /* $Id: bufpool.cpp,v 1.1 2000-02-09 08:50:21 jeroen Exp $ */
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| 2 | /*
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| 3 | ** License Applicability. Except to the extent portions of this file are
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| 4 | ** made subject to an alternative license as permitted in the SGI Free
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| 5 | ** Software License B, Version 1.0 (the "License"), the contents of this
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| 6 | ** file are subject only to the provisions of the License. You may not use
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| 7 | ** this file except in compliance with the License. You may obtain a copy
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| 8 | ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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| 9 | ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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| 10 | **
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| 11 | ** http://oss.sgi.com/projects/FreeB
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| 12 | **
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| 13 | ** Note that, as provided in the License, the Software is distributed on an
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| 14 | ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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| 15 | ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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| 16 | ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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| 17 | ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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| 18 | **
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| 19 | ** Original Code. The Original Code is: OpenGL Sample Implementation,
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| 20 | ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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| 21 | ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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| 22 | ** Copyright in any portions created by third parties is as indicated
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| 23 | ** elsewhere herein. All Rights Reserved.
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| 24 | **
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| 25 | ** Additional Notice Provisions: The application programming interfaces
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| 26 | ** established by SGI in conjunction with the Original Code are The
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| 27 | ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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| 28 | ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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| 29 | ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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| 30 | ** Window System(R) (Version 1.3), released October 19, 1998. This software
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| 31 | ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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| 32 | ** published by SGI, but has not been independently verified as being
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| 33 | ** compliant with the OpenGL(R) version 1.2.1 Specification.
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| 34 | */
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| 35 |
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| 36 | /*
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| 37 | * bufpool.c++
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| 38 | *
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| 39 | * $Date: 2000-02-09 08:50:21 $ $Revision: 1.1 $
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| 40 | * $Header: /home/ktk/tmp/odin/2007/netlabs.cvs/odin32/src/opengl/glu/nurbs/internals/bufpool.cpp,v 1.1 2000-02-09 08:50:21 jeroen Exp $
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| 41 | */
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| 42 |
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| 43 | #include <stdlib.h>
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| 44 | #include "glimports.h"
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| 45 | #include "myassert.h"
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| 46 | #include "bufpool.h"
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| 47 |
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| 48 |
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| 49 | /*-----------------------------------------------------------------------------
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| 50 | * Pool - allocate a new pool of buffers
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| 51 | *-----------------------------------------------------------------------------
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| 52 | */
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| 53 | Pool::Pool( int _buffersize, int initpoolsize, char *n )
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| 54 | {
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| 55 | buffersize= (_buffersize < sizeof(Buffer)) ? sizeof(Buffer) : _buffersize;
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| 56 | initsize = initpoolsize * buffersize;
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| 57 | nextsize = initsize;
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| 58 | name = n;
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| 59 | magic = is_allocated;
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| 60 | nextblock = 0;
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| 61 | curblock = 0;
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| 62 | freelist = 0;
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| 63 | nextfree = 0;
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| 64 | }
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| 65 |
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| 66 | /*-----------------------------------------------------------------------------
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| 67 | * ~Pool - free a pool of buffers and the pool itself
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| 68 | *-----------------------------------------------------------------------------
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| 69 | */
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| 70 |
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| 71 | Pool::~Pool( void )
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| 72 | {
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| 73 | assert( (this != 0) && (magic == is_allocated) );
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| 74 |
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| 75 | while( nextblock ) {
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| 76 | delete [] blocklist[--nextblock];
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| 77 | blocklist[nextblock] = 0;
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| 78 | }
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| 79 | magic = is_free;
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| 80 | }
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| 81 |
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| 82 |
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| 83 | void Pool::grow( void )
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| 84 | {
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| 85 | assert( (this != 0) && (magic == is_allocated) );
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| 86 | curblock = new char[nextsize];
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| 87 | blocklist[nextblock++] = curblock;
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| 88 | nextfree = nextsize;
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| 89 | nextsize *= 2;
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| 90 | }
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| 91 |
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| 92 | /*-----------------------------------------------------------------------------
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| 93 | * Pool::clear - free buffers associated with pool but keep pool
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| 94 | *-----------------------------------------------------------------------------
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| 95 | */
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| 96 |
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| 97 | void
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| 98 | Pool::clear( void )
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| 99 | {
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| 100 | assert( (this != 0) && (magic == is_allocated) );
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| 101 |
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| 102 | while( nextblock ) {
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| 103 | delete [] blocklist[--nextblock];
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| 104 | blocklist[nextblock] = 0;
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| 105 | }
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| 106 | curblock = 0;
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| 107 | freelist = 0;
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| 108 | nextfree = 0;
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| 109 | if( nextsize > initsize )
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| 110 | nextsize /= 2;
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| 111 | }
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