#include <config.h>
#include <mem.h>
#include <stdlib.h>
Include dependency graph for mm.h:
This graph shows which files directly or indirectly include this file:
Go to the source code of this file.
Defines | |
| #define | MM_FREE 0x0000 |
| marker: block free | |
| #define | MM_RESERVED 0xffff |
| marker: block reserved | |
| #define | MM_HEADER_SIZE 2 |
| 2 words header: pid, size | |
| #define | MM_SPLIT_THRESH (MM_HEADER_SIZE+8) |
| split off if 8+ data bytes | |
| #define | MM_BLOCK_FREE(addr) |
| memory from addr on can be allocated | |
| #define | MM_BLOCK_RESERVED(addr) |
| memory from addr on is reserved | |
Functions | |
| void | mm_init () |
| initialize memory management | |
| void | mm_reaper () |
| free all blocks allocated by the current process | |
| int | mm_free_mem (void) |
| how many bytes of memory are free? | |
Variables | |
| size_t | mm_start |
| end of kernel code + data | |
| size_t * | mm_first_free |
| ptr to first free block. | |
Definition in file mm.h.
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Value: next=(size_t*)(addr); \ *current=((((size_t)next)-(size_t)current)-2)>>1; \ *(next++)=MM_FREE; \ current=next; Macro for mm_init(). Always alternate MM_BLOCK_FREE and MM_BLOCK_RESERVED. |
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Value: next=(size_t*)(((size_t)addr)-4); \ *current=((((size_t)next)-(size_t)current)-2)>>1; \ *(next++)=MM_RESERVED; \ current=next; Macro for mm_init(). Always alternate MM_BLOCK_FREE and MM_BLOCK_RESERVED. |
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marker: block free
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2 words header: pid, size
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marker: block reserved
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split off if 8+ data bytes
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how many bytes of memory are free?
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initialize memory management
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free all blocks allocated by the current process
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ptr to first free block.
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end of kernel code + data
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brickOS is released under the
Mozilla Public License.
Original code copyright 1998-2002 by the authors. |
1.3.5