On Wed May 14 17:27:58 EDT 2014, quans...@quanstro.net wrote:
> > int
> > incref(Ref *r)
> > {
> > int x;
> >
> > x = ainc(&r->ref);
> > if(x <= 0)
> > panic("incref pc=%#p", getcallerpc(&r));
> > return x;
> > }
>
> ah, yes. i'd not remembered this nice implementation.
>
> then your ainc is gu
> int
> incref(Ref *r)
> {
> int x;
>
> x = ainc(&r->ref);
> if(x <= 0)
> panic("incref pc=%#p", getcallerpc(&r));
> return x;
> }
ah, yes. i'd not remembered this nice implementation.
then your ainc is guard-free? and your Ref is struct Ref {int ref;}?
also, did you decide that any reuse of t
% cat ../port/ref.c
#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
int
incref(Ref *r)
{
int x;
x = ainc(&r->ref);
if(x <= 0)
panic("incref pc=%#p", getcallerpc(&r));
return x;
}
int
decref(Ref *r)
{
int x;
x = adec(&r->ref);
if(x < 0)
panic("decref pc
for 386, libc has this definition for ainc
TEXT ainc(SB), $0 /* int ainc(int *); */
MOVLaddr+0(FP), BX
ainclp:
MOVL(BX), AX
MOVLAX, CX
INCLCX
LOCK
BYTE$0x0F; BYTE $0xB1; BYTE $0x0B /* CMPXCHGL CX, (BX) */
JNZ a
On Mon May 12 12:42:21 EDT 2014, cinap_len...@felloff.net wrote:
> why? if the program doesnt handle the note, then it shouldnt matter if it
> clunks the biobuf or not as it will be exited by the default handler.
you're right.
- erik
