1 files changed, 96 insertions, 96 deletions
diff --git a/Demo/threads/find.py b/Demo/threads/find.py
index f858ccc..11fb65a 100644
--- a/Demo/threads/find.py
+++ b/Demo/threads/find.py
@@ -32,121 +32,121 @@ import thread
 
 class WorkQ:
 
-	# Invariants:
-
-	# - busy and work are only modified when mutex is locked
-	# - len(work) is the number of jobs ready to be taken
-	# - busy is the number of jobs being done
-	# - todo is locked iff there is no work and somebody is busy
-
-	def __init__(self):
-		self.mutex = thread.allocate()
-		self.todo = thread.allocate()
-		self.todo.acquire()
-		self.work = []
-		self.busy = 0
-
-	def addwork(self, func, args):
-		job = (func, args)
-		self.mutex.acquire()
-		self.work.append(job)
-		self.mutex.release()
-		if len(self.work) == 1:
-			self.todo.release()
-
-	def _getwork(self):
-		self.todo.acquire()
-		self.mutex.acquire()
-		if self.busy == 0 and len(self.work) == 0:
-			self.mutex.release()
-			self.todo.release()
-			return None
-		job = self.work[0]
-		del self.work[0]
-		self.busy = self.busy + 1
-		self.mutex.release()
-		if len(self.work) > 0:
-			self.todo.release()
-		return job
-
-	def _donework(self):
-		self.mutex.acquire()
-		self.busy = self.busy - 1
-		if self.busy == 0 and len(self.work) == 0:
-			self.todo.release()
-		self.mutex.release()
-
-	def _worker(self):
-		time.sleep(0.00001)	# Let other threads run
-		while 1:
-			job = self._getwork()
-			if not job:
-				break
-			func, args = job
-			apply(func, args)
-			self._donework()
-
-	def run(self, nworkers):
-		if not self.work:
-			return # Nothing to do
-		for i in range(nworkers-1):
-			thread.start_new(self._worker, ())
-		self._worker()
-		self.todo.acquire()
+    # Invariants:
+
+    # - busy and work are only modified when mutex is locked
+    # - len(work) is the number of jobs ready to be taken
+    # - busy is the number of jobs being done
+    # - todo is locked iff there is no work and somebody is busy
+
+    def __init__(self):
+        self.mutex = thread.allocate()
+        self.todo = thread.allocate()
+        self.todo.acquire()
+        self.work = []
+        self.busy = 0
+
+    def addwork(self, func, args):
+        job = (func, args)
+        self.mutex.acquire()
+        self.work.append(job)
+        self.mutex.release()
+        if len(self.work) == 1:
+            self.todo.release()
+
+    def _getwork(self):
+        self.todo.acquire()
+        self.mutex.acquire()
+        if self.busy == 0 and len(self.work) == 0:
+            self.mutex.release()
+            self.todo.release()
+            return None
+        job = self.work[0]
+        del self.work[0]
+        self.busy = self.busy + 1
+        self.mutex.release()
+        if len(self.work) > 0:
+            self.todo.release()
+        return job
+
+    def _donework(self):
+        self.mutex.acquire()
+        self.busy = self.busy - 1
+        if self.busy == 0 and len(self.work) == 0:
+            self.todo.release()
+        self.mutex.release()
+
+    def _worker(self):
+        time.sleep(0.00001)     # Let other threads run
+        while 1:
+            job = self._getwork()
+            if not job:
+                break
+            func, args = job
+            apply(func, args)
+            self._donework()
+
+    def run(self, nworkers):
+        if not self.work:
+            return # Nothing to do
+        for i in range(nworkers-1):
+            thread.start_new(self._worker, ())
+        self._worker()
+        self.todo.acquire()
 
 
 # Main program
 
 def main():
-	sys.argv.append("/tmp")
-	nworkers = 4
-	opts, args = getopt.getopt(sys.argv[1:], '-w:')
-	for opt, arg in opts:
-		if opt == '-w':
-			nworkers = string.atoi(arg)
-	if not args:
-		args = [os.curdir]
+    sys.argv.append("/tmp")
+    nworkers = 4
+    opts, args = getopt.getopt(sys.argv[1:], '-w:')
+    for opt, arg in opts:
+        if opt == '-w':
+            nworkers = string.atoi(arg)
+    if not args:
+        args = [os.curdir]
 
-	wq = WorkQ()
-	for dir in args:
-		wq.addwork(find, (dir, selector, wq))
+    wq = WorkQ()
+    for dir in args:
+        wq.addwork(find, (dir, selector, wq))
 
-	t1 = time.time()
-	wq.run(nworkers)
-	t2 = time.time()
+    t1 = time.time()
+    wq.run(nworkers)
+    t2 = time.time()
 
-	sys.stderr.write('Total time ' + `t2-t1` + ' sec.\n')
+    sys.stderr.write('Total time ' + `t2-t1` + ' sec.\n')
 
 
 # The predicate -- defines what files we look for.
 # Feel free to change this to suit your purpose
 
 def selector(dir, name, fullname, stat):
-	# Look for group or world writable files
-	return (stat[ST_MODE] & 0022) != 0
+    # Look for group or world writable files
+    return (stat[ST_MODE] & 0022) != 0
 
 
 # The find procedure -- calls wq.addwork() for subdirectories
 
 def find(dir, pred, wq):
-	try:
-		names = os.listdir(dir)
-	except os.error, msg:
-		print `dir`, ':', msg
-		return
-	for name in names:
-		if name not in (os.curdir, os.pardir):
-			fullname = os.path.join(dir, name)
-			try:
-				stat = os.lstat(fullname)
-			except os.error, msg:
-				print `fullname`, ':', msg
-				continue
-			if pred(dir, name, fullname, stat):
-				print fullname
-			if S_ISDIR(stat[ST_MODE]):
-				if not os.path.ismount(fullname):
-					wq.addwork(find, (fullname, pred, wq))
+    try:
+        names = os.listdir(dir)
+    except os.error, msg:
+        print `dir`, ':', msg
+        return
+    for name in names:
+        if name not in (os.curdir, os.pardir):
+            fullname = os.path.join(dir, name)
+            try:
+                stat = os.lstat(fullname)
+            except os.error, msg:
+                print `fullname`, ':', msg
+                continue
+            if pred(dir, name, fullname, stat):
+                print fullname
+            if S_ISDIR(stat[ST_MODE]):
+                if not os.path.ismount(fullname):
+                    wq.addwork(find, (fullname, pred, wq))
 
 
 # Call the main program