47 lines
917 B
Python
47 lines
917 B
Python
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"""
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pdf2image filename generators
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"""
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import uuid
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import threading
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class ThreadSafeGenerator(object):
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"""Wrapper around generator that protects concurrent access"""
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def __init__(self, gen):
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self.gen = gen
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self.lock = threading.Lock()
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def __iter__(self):
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return self
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def __next__(self):
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with self.lock:
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return next(self.gen)
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def threadsafe(f):
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"""Decorator to make generator threadsafe. Fix #125"""
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def g(*a, **kw):
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return ThreadSafeGenerator(f(*a, **kw))
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return g
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@threadsafe
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def uuid_generator():
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"""Returns a UUID4"""
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while True:
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yield str(uuid.uuid4())
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@threadsafe
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def counter_generator(prefix="", suffix="", padding_goal=4):
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"""Returns a joined prefix, iteration number, and suffix"""
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i = 0
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while True:
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i += 1
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yield str(prefix) + str(i).zfill(padding_goal) + str(suffix)
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