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Whitespace normalization.

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Tim Peters 2001-01-14 23:47:14 +00:00
parent 88869f9787
commit 07e99cb774
18 changed files with 1933 additions and 1936 deletions
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64
Lib/mutex.py
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@ -13,39 +13,39 @@ for lock, where a function is called once the lock is aquired.
"""
class mutex:
def __init__(self):
"""Create a new mutex -- initially unlocked."""
self.locked = 0
self.queue = []
def __init__(self):
"""Create a new mutex -- initially unlocked."""
self.locked = 0
self.queue = []
def test(self):
"""Test the locked bit of the mutex."""
return self.locked
def test(self):
"""Test the locked bit of the mutex."""
return self.locked
def testandset(self):
"""Atomic test-and-set -- grab the lock if it is not set,
return true if it succeeded."""
if not self.locked:
self.locked = 1
return 1
else:
return 0
def testandset(self):
"""Atomic test-and-set -- grab the lock if it is not set,
return true if it succeeded."""
if not self.locked:
self.locked = 1
return 1
else:
return 0
def lock(self, function, argument):
"""Lock a mutex, call the function with supplied argument
when it is acquired. If the mutex is already locked, place
function and argument in the queue."""
if self.testandset():
function(argument)
else:
self.queue.append((function, argument))
def lock(self, function, argument):
"""Lock a mutex, call the function with supplied argument
when it is acquired. If the mutex is already locked, place
function and argument in the queue."""
if self.testandset():
function(argument)
else:
self.queue.append((function, argument))
def unlock(self):
"""Unlock a mutex. If the queue is not empty, call the next
function with its argument."""
if self.queue:
function, argument = self.queue[0]
del self.queue[0]
function(argument)
else:
self.locked = 0
def unlock(self):
"""Unlock a mutex. If the queue is not empty, call the next
function with its argument."""
if self.queue:
function, argument = self.queue[0]
del self.queue[0]
function(argument)
else:
self.locked = 0