1/*
2** License Applicability. Except to the extent portions of this file are
3** made subject to an alternative license as permitted in the SGI Free
4** Software License B, Version 1.1 (the "License"), the contents of this
5** file are subject only to the provisions of the License. You may not use
6** this file except in compliance with the License. You may obtain a copy
7** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
8** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
9**
10** http://oss.sgi.com/projects/FreeB
11**
12** Note that, as provided in the License, the Software is distributed on an
13** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
14** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
15** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
16** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
17**
18** Original Code. The Original Code is: OpenGL Sample Implementation,
19** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
20** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
21** Copyright in any portions created by third parties is as indicated
22** elsewhere herein. All Rights Reserved.
23**
24** Additional Notice Provisions: The application programming interfaces
25** established by SGI in conjunction with the Original Code are The
26** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
27** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
28** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
29** Window System(R) (Version 1.3), released October 19, 1998. This software
30** was created using the OpenGL(R) version 1.2.1 Sample Implementation
31** published by SGI, but has not been independently verified as being
32** compliant with the OpenGL(R) version 1.2.1 Specification.
33*/
34
35/*
36 *  bufpool.c++
37 *
38 */
39
40#include "glimports.h"
41#include "myassert.h"
42#include "bufpool.h"
43
44
45/*-----------------------------------------------------------------------------
46 * Pool - allocate a new pool of buffers
47 *-----------------------------------------------------------------------------
48 */
49Pool::Pool( int _buffersize, int initpoolsize, const char *n )
50{
51    if((unsigned)_buffersize < sizeof(Buffer))
52        buffersize = sizeof(Buffer);
53    else
54        buffersize = _buffersize;
55    initsize	= initpoolsize * buffersize;
56    nextsize	= initsize;
57    name	= n;
58    magic	= is_allocated;
59    nextblock	= 0;
60    curblock	= 0;
61    freelist	= 0;
62    nextfree	= 0;
63    for (int i = 0; i < NBLOCKS; i++) {
64        blocklist[i] = 0;
65    }
66}
67
68/*-----------------------------------------------------------------------------
69 * ~Pool - free a pool of buffers and the pool itself
70 *-----------------------------------------------------------------------------
71 */
72
73Pool::~Pool( void )
74{
75    assert( (this != 0) && (magic == is_allocated) );
76
77    while( nextblock ) {
78	delete [] blocklist[--nextblock];
79        blocklist[nextblock] = 0;
80    }
81    magic = is_free;
82}
83
84
85void Pool::grow( void )
86{
87    assert( (this != 0) && (magic == is_allocated) );
88    curblock = new char[nextsize];
89    blocklist[nextblock++] = curblock;
90    nextfree = nextsize;
91    nextsize *= 2;
92}
93
94/*-----------------------------------------------------------------------------
95 * Pool::clear - free buffers associated with pool but keep pool
96 *-----------------------------------------------------------------------------
97 */
98
99void
100Pool::clear( void )
101{
102    assert( (this != 0) && (magic == is_allocated) );
103
104    while( nextblock ) {
105	delete [] blocklist[--nextblock];
106	blocklist[nextblock] = 0;
107    }
108    curblock	= 0;
109    freelist	= 0;
110    nextfree	= 0;
111    if( nextsize > initsize )
112        nextsize /= 2;
113}
114