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cc65/libsrc/atari/close.s
2022-08-28 22:37:33 +02:00

30 lines
687 B
ArmAsm

;
; Christian Groessler, May-2000
;
; int __fastcall__ close(int fd);
;
.include "atari.inc"
.export _close
.import __do_oserror,popax,___oserror
.import fdtoiocb_down,__inviocb
.proc _close
jsr fdtoiocb_down ; get iocb index into X and decr. usage count
bmi inverr
bne ok ; not last one -> don't close yet
lda #CLOSE
sta ICCOM,x
jsr CIOV
bmi closerr
ok: ldx #0
stx ___oserror ; clear system specific error code
txa
rts
inverr: jmp __inviocb
closerr:jmp __do_oserror
.endproc