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:
10 ** http://oss.sgi.com/projects/FreeB
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.
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.
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.
40 #ifndef __glubufpool_h_
41 #define __glubufpool_h_
51 Buffer
* next
; /* next buffer on free list */
56 Pool( int, int, char * );
58 inline void* new_buffer( void );
59 inline void free_buffer( void * );
66 Buffer
*freelist
; /* linked list of free buffers */
67 char *blocklist
[NBLOCKS
]; /* blocks of malloced memory */
68 int nextblock
; /* next free block index */
69 char *curblock
; /* last malloced block */
70 int buffersize
; /* bytes per buffer */
71 int nextsize
; /* size of next block of memory */
72 int nextfree
; /* byte offset past next free buffer */
74 enum Magic
{ is_allocated
= 0xf3a1, is_free
= 0xf1a2 };
75 char *name
; /* name of the pool */
76 Magic magic
; /* marker for valid pool */
79 /*-----------------------------------------------------------------------------
80 * Pool::free_buffer - return a buffer to a pool
81 *-----------------------------------------------------------------------------
85 Pool::free_buffer( void *b
)
87 assert( (this != 0) && (magic
== is_allocated
) );
89 /* add buffer to singly connected free list */
91 ((Buffer
*) b
)->next
= freelist
;
92 freelist
= (Buffer
*) b
;
96 /*-----------------------------------------------------------------------------
97 * Pool::new_buffer - allocate a buffer from a pool
98 *-----------------------------------------------------------------------------
102 Pool::new_buffer( void )
106 assert( (this != 0) && (magic
== is_allocated
) );
108 /* find free buffer */
111 buffer
= (void *) freelist
;
112 freelist
= freelist
->next
;
116 nextfree
-= buffersize
;;
117 buffer
= (void *) (curblock
+ nextfree
);
124 inline void * operator new( size_t, Pool
& );
125 inline void * operator new( size_t, void *);
126 inline void * operator new( size_t s
)
127 { return ::new char[s
]; }
128 inline void operator delete( void * ) { assert( 0 ); }
129 inline void operator delete( void *, Pool
& ) { assert( 0 ); }
130 inline void deleteMe( Pool
& );
134 PooledObj::operator new( size_t, Pool
& pool
)
136 return pool
.new_buffer();
140 PooledObj::deleteMe( Pool
& pool
)
142 pool
.free_buffer( (void *) this );
145 #endif /* __glubufpool_h_ */