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