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bitbake utils.py: Fix ocassional locking glitch with a better retrying mechanism 

git-svn-id: https://svn.o-hand.com/repos/poky/trunk@5415 311d38ba-8fff-0310-9ca6-ca027cbcb966
This commit is contained in:
Richard Purdie 2008-10-06 08:09:11 +00:00
parent 527b3372cd
commit f4337b9803
2 changed files with 24 additions and 18 deletions
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21
bitbake-dev/lib/bb/utils.py
View File

@ -246,15 +246,18 @@ def lockfile(name):
# This implementation is unfair since the last person to request the
# lock is the most likely to win it.
lf = open(name, "a+")
fcntl.flock(lf.fileno(), fcntl.LOCK_EX)
statinfo = os.fstat(lf.fileno())
if os.path.exists(lf.name):
statinfo2 = os.stat(lf.name)
if statinfo.st_ino == statinfo2.st_ino:
return lf
# File no longer exists or changed, retry
lf.close
try:
lf = open(name, "a+")
fcntl.flock(lf.fileno(), fcntl.LOCK_EX)
statinfo = os.fstat(lf.fileno())
if os.path.exists(lf.name):
statinfo2 = os.stat(lf.name)
if statinfo.st_ino == statinfo2.st_ino:
return lf
# File no longer exists or changed, retry
lf.close
except Exception, e:
continue
def unlockfile(lf):
"""

21
bitbake/lib/bb/utils.py
View File

@ -246,15 +246,18 @@ def lockfile(name):
# This implementation is unfair since the last person to request the
# lock is the most likely to win it.
lf = open(name, "a+")
fcntl.flock(lf.fileno(), fcntl.LOCK_EX)
statinfo = os.fstat(lf.fileno())
if os.path.exists(lf.name):
statinfo2 = os.stat(lf.name)
if statinfo.st_ino == statinfo2.st_ino:
return lf
# File no longer exists or changed, retry
lf.close
try:
lf = open(name, "a+")
fcntl.flock(lf.fileno(), fcntl.LOCK_EX)
statinfo = os.fstat(lf.fileno())
if os.path.exists(lf.name):
statinfo2 = os.stat(lf.name)
if statinfo.st_ino == statinfo2.st_ino:
return lf
# File no longer exists or changed, retry
lf.close
except Exception, e:
continue
def unlockfile(lf):
"""