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devaudio: interlock reads too

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This commit is contained in:
cinap_lenrek 2011-06-04 01:04:14 +00:00
parent 75edd13d78
commit f83d4972db
1 changed files with 12 additions and 9 deletions
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21
sys/src/9/port/devaudio.c
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@ -215,15 +215,15 @@ audioread(Chan *c, void *a, long n, vlong off)
if(fn == nil)
error(Egreg);
qlock(ac);
if(waserror()){
qunlock(ac);
nexterror();
}
switch((ulong)c->qid.path){
case Qaudioctl:
case Qaudiostatus:
case Qvolume:
qlock(ac);
if(waserror()){
qunlock(ac);
nexterror();
}
/* generate the text on first read */
if(ac->data == nil || off == 0){
long l;
@ -237,11 +237,14 @@ audioread(Chan *c, void *a, long n, vlong off)
}
/* then serve all requests from buffer */
n = readstr(off, a, n, ac->data);
qunlock(ac);
poperror();
return n;
break;
default:
n = fn(adev, a, n, off);
}
return fn(adev, a, n, off);
qunlock(ac);
poperror();
return n;
}
static long