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runqueue.py: Use fcntl to make the worker pipes non-blocking 

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
This commit is contained in:
Richard Purdie 2010-01-21 23:46:20 +00:00
parent fd42ffa273
commit 5c62833766
1 changed files with 6 additions and 1 deletions
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7
bitbake/lib/bb/runqueue.py
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@ -26,6 +26,7 @@ from bb import msg, data, event, mkdirhier, utils
import bb, os, sys
import signal
import stat
import fcntl
class TaskFailure(Exception):
"""Exception raised when a task in a runqueue fails"""
@ -1161,12 +1162,16 @@ class runQueuePipe():
def __init__(self, pipein, pipeout, d):
self.fd = pipein
os.close(pipeout)
fcntl.fcntl(self.fd, fcntl.F_SETFL, fcntl.fcntl(self.fd, fcntl.F_GETFL) | os.O_NONBLOCK)
self.queue = ""
self.d = d
def read(self):
start = len(self.queue)
self.queue = self.queue + os.read(self.fd, 1024)
try:
self.queue = self.queue + os.read(self.fd, 1024)
except OSError:
pass
end = len(self.queue)
index = self.queue.find("</event>")
while index != -1: