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Fix another problem with the new pipe code, pointed out by Bruce Evans.

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This one fixes a problem with interactions with signals.
This commit is contained in:
John Dyson 1996-01-31 06:00:45 +00:00
parent 3bc746be91
commit 4ab7a1a6c7
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=13776
1 changed files with 6 additions and 7 deletions
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13
sys/kern/sys_pipe.c
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@ -18,7 +18,7 @@
* 5. Modifications may be freely made to this file if the above conditions
* are met.
*
* $Id: sys_pipe.c,v 1.2 1996/01/29 02:57:33 dyson Exp $
* $Id: sys_pipe.c,v 1.3 1996/01/31 02:05:12 dyson Exp $
*/
#ifndef OLD_PIPE
@ -191,10 +191,11 @@ static __inline int
pipelock(cpipe)
struct pipe *cpipe;
{
int error;
while (cpipe->pipe_state & PIPE_LOCK) {
cpipe->pipe_state |= PIPE_LWANT;
if (tsleep( &cpipe->pipe_state, PRIBIO|PCATCH, "pipelk", 0)) {
return ERESTART;
if (error = tsleep( &cpipe->pipe_state, PRIBIO|PCATCH, "pipelk", 0)) {
return error;
}
}
cpipe->pipe_state |= PIPE_LOCK;
@ -290,8 +291,7 @@ pipe_read(fp, uio, cred)
break;
}
rpipe->pipe_state |= PIPE_WANTR;
if (tsleep(rpipe, PRIBIO|PCATCH, "piperd", 0)) {
error = ERESTART;
if (error = tsleep(rpipe, PRIBIO|PCATCH, "piperd", 0)) {
break;
}
}
@ -387,8 +387,7 @@ pipe_write(fp, uio, cred)
break;
}
wpipe->pipe_state |= PIPE_WANTW;
if (tsleep(wpipe, (PRIBIO+1)|PCATCH, "pipewr", 0)) {
error = ERESTART;
if (error = tsleep(wpipe, (PRIBIO+1)|PCATCH, "pipewr", 0)) {
break;
}
/*