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 */ 49 Pool::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 73 Pool::~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 85 void 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 99 void 100 Pool::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