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libthread: fix no-receive nbrecv etc. bug (David Jeannot)

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This commit is contained in:
Russ Cox 2008-05-06 12:51:19 -04:00
parent 454ae2ad28
commit 0215811dc2
1 changed files with 12 additions and 8 deletions
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20
src/libthread/channel.c
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@ -363,8 +363,9 @@ chanrecvp(Channel *c)
{
void *v;
_chanop(c, CHANRCV, (void*)&v, 1);
return v;
if(_chanop(c, CHANRCV, (void*)&v, 1) > 0)
return v;
return nil;
}
int
@ -378,8 +379,9 @@ channbrecvp(Channel *c)
{
void *v;
_chanop(c, CHANRCV, (void*)&v, 0);
return v;
if(_chanop(c, CHANRCV, (void*)&v, 0) > 0)
return v;
return nil;
}
int
@ -393,8 +395,9 @@ chanrecvul(Channel *c)
{
ulong val;
_chanop(c, CHANRCV, &val, 1);
return val;
if(_chanop(c, CHANRCV, &val, 1) > 0)
return val;
return -1;
}
int
@ -408,7 +411,8 @@ channbrecvul(Channel *c)
{
ulong val;
_chanop(c, CHANRCV, &val, 0);
return val;
if(_chanop(c, CHANRCV, &val, 0) > 0)
return val;
return -1;
}