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https://github.com/GnoConsortium/gno.git
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177 lines
2.5 KiB
NASM
177 lines
2.5 KiB
NASM
**************************************************************************
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*
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* The GNO Shell Project
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*
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* Developed by:
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* Jawaid Bazyar
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* Tim Meekins
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*
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**************************************************************************
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*
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* BUFPOOL
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* By Tim Meekins
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*
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* This is the buffer pool
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*
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**************************************************************************
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keep o/bufpool
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mcopy m/bufpool.mac
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**************************************************************************
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*
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* get a buffer of size 256
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*
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**************************************************************************
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alloc256 START
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using bufpool
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lock pool256mutex
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lda pool256
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ora pool256+2
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beq allocbuf
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phd
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ph4 pool256
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tsc
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tcd
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lda [1]
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sta pool256
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ldy #2
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lda [1],y
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sta pool256+2
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unlock pool256mutex
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pla
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plx
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pld
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rtl
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allocbuf unlock pool256mutex
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ph4 #256
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jsl ~NEW
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rtl
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END
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**************************************************************************
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*
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* free a buffer of size 256
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*
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**************************************************************************
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free256 START
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using bufpool
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phd
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phx
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pha
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tsc
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tcd
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lock pool256mutex
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lda pool256
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sta [1]
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ldy #2
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lda pool256+2
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sta [1],y
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lda 1
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sta pool256
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lda 3
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sta pool256+2
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unlock pool256mutex
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pla
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plx
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pld
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rtl
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END
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**************************************************************************
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*
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* get a buffer of size 1024
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*
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**************************************************************************
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alloc1024 START
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using bufpool
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lock pool1024mutex
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lda pool1024
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ora pool1024+2
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beq allocbuf
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phd
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ph4 pool1024
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tsc
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tcd
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lda [1]
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sta pool1024
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ldy #2
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lda [1],y
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sta pool1024+2
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unlock pool1024mutex
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pla
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plx
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pld
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rtl
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allocbuf unlock pool1024mutex
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ph4 #1024
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jsl ~NEW
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rtl
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END
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**************************************************************************
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*
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* free a buffer of size 1024
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*
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**************************************************************************
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free1024 START
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using bufpool
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phd
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phx
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pha
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tsc
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tcd
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lock pool1024mutex
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lda pool1024
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sta [1]
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ldy #2
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lda pool1024+2
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sta [1],y
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lda 1
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sta pool1024
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lda 3
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sta pool1024+2
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unlock pool1024mutex
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pla
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plx
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pld
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rtl
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END
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**************************************************************************
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*
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* buffer pool data
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*
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**************************************************************************
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bufpool DATA
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pool256 dc i4'0'
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pool256mutex key
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pool1024 dc i4'0'
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pool1024mutex key
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END
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