bernsteinbear.com
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1#!/usr/bin/env python3
2# Copyright (c) Facebook, Inc. and its affiliates. (http://www.facebook.com)
3
4from _builtins import _builtin, _Unbound, _unimplemented
5
6
7# TODO(T53322979): Re-write to be thread-safe
8class LockType:
9 def __exit__(self, t, v, tb):
10 self.release()
11
12 def __init__(self):
13 self._locked = False
14
15 def acquire(self, blocking=True, timeout=-1):
16 if self._locked:
17 if not blocking:
18 return False
19 # No implementation of timeout
20 _unimplemented()
21 self._locked = True
22 return True
23
24 __enter__ = acquire
25
26 acquire_lock = acquire
27
28 def locked(self):
29 return self._locked
30
31 def release(self):
32 if not self._locked:
33 raise RuntimeError("release unlocked lock")
34 self._locked = False
35
36 release_lock = release
37
38
39class RLock:
40 """Recursive (pseudo) Lock assuming single-threaded execution."""
41
42 def __init__(self):
43 self._count = 0
44
45 def acquire(self, blocking=True, timeout=-1):
46 self._count += 1
47
48 __enter__ = acquire
49
50 def release(self):
51 if self._count == 0:
52 raise RuntimeError("cannot release un-acquired lock")
53 self._count -= 1
54
55 def __exit__(self, t, v, tb):
56 self.release()
57
58
59def _count():
60 _unimplemented()
61
62
63class _local:
64 pass
65
66
67def _set_sentinel():
68 _unimplemented()
69
70
71def allocate():
72 _unimplemented()
73
74
75allocate_lock = LockType
76
77
78error = RuntimeError
79
80
81def exit():
82 _unimplemented()
83
84
85def exit_thread():
86 _unimplemented()
87
88
89def get_ident():
90 _builtin()
91
92
93def interrupt_main():
94 _unimplemented()
95
96
97def stack_size(size=0):
98 _unimplemented()
99
100
101def start_new(function, args, kwargs=_Unbound):
102 """Obsolete synonym of start_new_thread"""
103 _builtin()
104
105
106def start_new_thread(function, args, kwargs=_Unbound):
107 _builtin()