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  1. class SharedPointerPrinter:
  2.     "Print a shared_ptr or weak_ptr"
  3.  
  4.     class _iterator:
  5.         def __init__(self, sharedPointer):
  6.             self.sharedPointer = sharedPointer
  7.             self.managedValue = sharedPointer.val['_M_ptr']
  8.             self.count = 0
  9.  
  10.         def __iter__(self):
  11.             return self
  12.  
  13.         def next(self):
  14.             if self.managedValue == 0:
  15.                 raise StopIteration
  16.             self.count = self.count + 1
  17.             if (self.count == 1):
  18.                 return ('Managed value', self.managedValue.cast(self.managedValue.dynamic_type).dereference())
  19.  
  20.             else:
  21.                 raise StopIteration
  22.  
  23.     def __init__ (self, typename, val):
  24.         self.typename = typename
  25.         self.val = val
  26.  
  27.     def children (self):
  28.         return self._iterator(self)
  29.  
  30.     def to_string (self):
  31.         state = 'empty'
  32.         refcounts = self.val['_M_refcount']['_M_pi']
  33.         if refcounts != 0:
  34.             usecount = refcounts['_M_use_count']
  35.             weakcount = refcounts['_M_weak_count']
  36.             if usecount == 0:
  37.                 state = 'expired, weakcount %d' % weakcount
  38.             else:
  39.                 state = 'usecount %d, weakcount %d' % (usecount, weakcount - 1)
  40.         return '%s (%s) to %s' % (self.typename, state, self.val['_M_ptr'])
Success #stdin #stdout 0.08s 8832KB
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https://ideone.com/Y1nWoU
language:
Python (cpython 2.7.16)
created:
12 years ago
visibility:
secret

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