/* * GLX Hardware Device Driver common code * Copyright (C) 1999 Keith Whitwell * * 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, sublicense, * 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 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 NONINFRINGEMENT. IN NO EVENT SHALL * KEITH WHITWELL, OR ANY OTHER CONTRIBUTORS 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. * */ #ifndef MM_INC #define MM_INC struct mem_block_t { struct mem_block_t *next; struct mem_block_t *heap; int ofs,size; int align; int free:1; int reserved:1; }; typedef struct mem_block_t TMemBlock; typedef struct mem_block_t *PMemBlock; /* a heap is just the first block in a chain */ typedef struct mem_block_t memHeap_t; static __inline__ int mmBlockSize(PMemBlock b) { return b->size; } static __inline__ int mmOffset(PMemBlock b) { return b->ofs; } /* * input: total size in bytes * return: a heap pointer if OK, NULL if error */ memHeap_t *mmInit( int ofs, int size ); /* * Allocate 'size' bytes with 2^align2 bytes alignment, * restrict the search to free memory after 'startSearch' * depth and back buffers should be in different 4mb banks * to get better page hits if possible * input: size = size of block * align2 = 2^align2 bytes alignment * startSearch = linear offset from start of heap to begin search * return: pointer to the allocated block, 0 if error */ PMemBlock mmAllocMem( memHeap_t *heap, int size, int align2, int startSearch ); /* * Free block starts at offset * input: pointer to a block * return: 0 if OK, -1 if error */ int mmFreeMem( PMemBlock b ); /* * destroy MM */ void mmDestroy( memHeap_t *mmInit ); /* For debuging purpose. */ void mmDumpMemInfo( memHeap_t *mmInit ); #endif