| /************************************************************************** |
| * |
| * Copyright 2006-2008 Tungsten Graphics, Inc., Cedar Park, TX., USA. |
| * All Rights Reserved. |
| * Copyright 2009 VMware, Inc., Palo Alto, CA., USA. |
| * All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the |
| * "Software"), to deal in the Software without restriction, including |
| * without limitation the rights to use, copy, modify, merge, publish, |
| * distribute, sub license, and/or sell copies of the Software, and to |
| * permit persons to whom the Software is furnished to do so, subject to |
| * the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the |
| * next paragraph) shall be included in all copies or substantial portions |
| * of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
| * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
| * USE OR OTHER DEALINGS IN THE SOFTWARE. |
| * |
| **************************************************************************/ |
| |
| /* |
| * Generic simple memory manager implementation. Intended to be used as a base |
| * class implementation for more advanced memory managers. |
| * |
| * Note that the algorithm used is quite simple and there might be substantial |
| * performance gains if a smarter free list is implemented. Currently it is just an |
| * unordered stack of free regions. This could easily be improved if an RB-tree |
| * is used instead. At least if we expect heavy fragmentation. |
| * |
| * Authors: |
| * Thomas Hellstrom <thomas-at-tungstengraphics-dot-com> |
| */ |
| |
| #ifndef _WSBM_MM_H_ |
| #define _WSBM_MM_H_ |
| |
| #include "wsbm_util.h" |
| struct _WsbmMM |
| { |
| struct _WsbmListHead fl_entry; |
| struct _WsbmListHead ml_entry; |
| }; |
| |
| struct _WsbmMMNode |
| { |
| struct _WsbmListHead fl_entry; |
| struct _WsbmListHead ml_entry; |
| int free; |
| unsigned long start; |
| unsigned long size; |
| struct _WsbmMM *mm; |
| }; |
| |
| extern struct _WsbmMMNode *wsbmMMSearchFree(const struct _WsbmMM *mm, |
| unsigned long size, |
| unsigned alignment, |
| int best_match); |
| extern struct _WsbmMMNode *wsbmMMGetBlock(struct _WsbmMMNode *parent, |
| unsigned long size, |
| unsigned alignment); |
| extern void wsbmMMPutBlock(struct _WsbmMMNode *cur); |
| extern void wsbmMMtakedown(struct _WsbmMM *mm); |
| extern int wsbmMMinit(struct _WsbmMM *mm, unsigned long start, |
| unsigned long size); |
| extern int wsbmMMclean(struct _WsbmMM *mm); |
| #endif |