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Add some missing requests for the read-side to wakeup the write-side. Also

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add some missing wakeups by the write side to the read side.
This commit is contained in:
John Dyson 1996-02-09 04:36:36 +00:00
parent 015234b2e8
commit 5af564b4f4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=13992
1 changed files with 11 additions and 2 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 1.8 1996/02/05 05:50:34 dyson Exp $
* $Id: sys_pipe.c,v 1.9 1996/02/07 06:41:56 dyson Exp $
*/
#ifndef OLD_PIPE
@ -591,7 +591,7 @@ retry:
wpipe->pipe_state &= ~PIPE_WANTR;
wakeup(wpipe);
}
wpipe->pipe_state |= PIPE_WANTW;
error = tsleep(wpipe,
PRIBIO|PCATCH, "pipdww", 0);
if (error || (wpipe->pipe_state & PIPE_EOF))
@ -604,6 +604,7 @@ retry:
wakeup(wpipe);
}
wpipe->pipe_state |= PIPE_WANTW;
error = tsleep(wpipe,
PRIBIO|PCATCH, "pipdwc", 0);
if (error || (wpipe->pipe_state & PIPE_EOF)) {
@ -637,6 +638,10 @@ retry:
wakeup(wpipe);
return EPIPE;
}
if (wpipe->pipe_state & PIPE_WANTR) {
wpipe->pipe_state &= ~PIPE_WANTR;
wakeup(wpipe);
}
error = tsleep(wpipe, PRIBIO|PCATCH, "pipdwt", 0);
}
@ -708,6 +713,10 @@ pipewrite(wpipe, uio, nbio)
*/
retrywrite:
while (wpipe->pipe_state & PIPE_DIRECTW) {
if (wpipe->pipe_state & PIPE_WANTR) {
wpipe->pipe_state &= ~PIPE_WANTR;
wakeup(wpipe);
}
error = tsleep(wpipe,
PRIBIO|PCATCH, "pipbww", 0);
if (error)