43 lines
588 B
PHP
43 lines
588 B
PHP
;; File: bio.inc
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;; Buffer cache
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;; Struc: Buffer
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struc Buffer {
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.dev dd ?
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.block dd ?
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.ulock dd ?
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.refcount dd ?
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.data db 512 dup(?)
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}
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DEFN Buffer
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;; Function: bio_init
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bio_init:
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mov ecx, sizeof.Buffer * 30
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xor ax, ax
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mov edi, aBuffers
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rep stosb
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ret
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;; Function: bio_read
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;;
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bio_bread:
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mov eax, uBIOLock
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call lock_acquire
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mov eax, uBIOLock
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call lock_release
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ret
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;; Function: bio_brelse
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;; Unbusy a buffer and release it to the free lists.
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bio_brelse:
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mov eax, uBIOLock
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call lock_acquire
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mov eax, uBIOLock
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call lock_release
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ret
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uBIOLock dd 0
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