90 lines
2.3 KiB
OpenEdge ABL
90 lines
2.3 KiB
OpenEdge ABL
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IFND EXEC_MEMORY_I
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EXEC_MEMORY_I SET 1
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**
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** $Filename: exec/memory.i $
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** $Release: 1.3 $
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**
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** definitions for use with the memory allocator
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**
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** (C) Copyright 1985,1986,1987,1988 Commodore-Amiga, Inc.
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** All Rights Reserved
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**
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IFND EXEC_NODES_I
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INCLUDE "exec/nodes.i"
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ENDC ; EXEC_NODES_I
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*---------------------------------------------------------------------
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*
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* Memory List Structures
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*
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*---------------------------------------------------------------------
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*
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* A memory list appears in two forms: One is a requirements list*
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* the other is a list of already allocated memory. The format is
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* the same, with the reqirements/address field occupying the same
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* position.
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*
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* The format is a linked list of ML structures each of which has
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* an array of ME entries.
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*
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*---------------------------------------------------------------------
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STRUCTURE ML,LN_SIZE
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UWORD ML_NUMENTRIES * The number of ME structures that follow
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LABEL ML_ME * where the ME structures begin
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LABEL ML_SIZE
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STRUCTURE ME,0
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LABEL ME_REQS * the AllocMem requirements
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APTR ME_ADDR * the address of this block (an alias
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* * for the same location as ME_REQS)
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ULONG ME_LENGTH * the length of this region
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LABEL ME_SIZE
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*------ memory options:
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BITDEF MEM,PUBLIC,0
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BITDEF MEM,CHIP,1
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BITDEF MEM,FAST,2
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BITDEF MEM,CLEAR,16
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BITDEF MEM,LARGEST,17
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*------ alignment rules for a memory block:
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MEM_BLOCKSIZE EQU 8
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MEM_BLOCKMASK EQU (MEM_BLOCKSIZE-1)
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*---------------------------------------------------------------------
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*
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* Memory Region Header
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*
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*---------------------------------------------------------------------
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STRUCTURE MH,LN_SIZE
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UWORD MH_ATTRIBUTES * characteristics of this region
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APTR MH_FIRST * first free region
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APTR MH_LOWER * lower memory bound
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APTR MH_UPPER * upper memory bound+1
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ULONG MH_FREE * number of free bytes
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LABEL MH_SIZE
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*---------------------------------------------------------------------
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*
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* Memory Chunk
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*
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*---------------------------------------------------------------------
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STRUCTURE MC,0
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APTR MC_NEXT * ptr to next chunk
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ULONG MC_BYTES * chunk byte size
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LABEL MC_SIZE
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ENDC ; EXEC_MEMORY_I
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