IABSD.fr/xenocara/lib/libGLU/src/libnurbs/internals/bufpool.cc

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• Author : jsg
  Date : 2013-09-01 03:51:12
  Hash : 729f7da4
  Message : Update to GLU 9.0.0, GLU was previously part of Mesa but is now seperate. tested in a ports bulk build by landry@, ok matthieu@

• lib/libGLU/src/libnurbs/internals/bufpool.cc

• /*
  ** 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++
   *
   */
  
  #include "glimports.h"
  #include "myassert.h"
  #include "bufpool.h"
  
  
  /*-----------------------------------------------------------------------------
   * Pool - allocate a new pool of buffers
   *-----------------------------------------------------------------------------
   */
  Pool::Pool( int _buffersize, int initpoolsize, const 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;
      for (int i = 0; i < NBLOCKS; i++) {
          blocklist[i] = 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;
  }