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1
2 # HG changeset patch
3 # User Victor Stinner <victor.stinner@gmail.com>
4 # Date 1442581594 -7200
5 # Node ID d4fcb362f7c66b25b22ddc0d27db0cc96acc727b
6 # Parent  d04a0954e142f873adee88ec5bc1c1d81cd46bc4
7 Issue #25150: Hide the private _Py_atomic_xxx symbols from the public
8 Python.h header to fix a compilation error with OpenMP. PyThreadState_GET()
9 becomes an alias to PyThreadState_Get() to avoid ABI incompatibilies.
10
11 It is important that the _PyThreadState_Current variable is always accessed
12 with the same implementation of pyatomic.h. Use the PyThreadState_Get()
13 function so extension modules will all reuse the same implementation.
14
15 diff --git a/Include/pyatomic.h b/Include/pyatomic.h
16 --- a/Include/pyatomic.h
17 +++ b/Include/pyatomic.h
18 @@ -1,8 +1,6 @@
19 -/* Issue #23644: <stdatomic.h> is incompatible with C++, see:
20 -   https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60932 */
21 -#if !defined(Py_LIMITED_API) && !defined(__cplusplus)
22  #ifndef Py_ATOMIC_H
23  #define Py_ATOMIC_H
24 +#ifdef Py_BUILD_CORE
25  
26  #include "dynamic_annotations.h"
27  
28 @@ -248,5 +246,5 @@ static __inline__ void
29  #define _Py_atomic_load_relaxed(ATOMIC_VAL) \
30      _Py_atomic_load_explicit(ATOMIC_VAL, _Py_memory_order_relaxed)
31  
32 +#endif  /* Py_BUILD_CORE */
33  #endif  /* Py_ATOMIC_H */
34 -#endif  /* Py_LIMITED_API */
35 diff --git a/Include/pystate.h b/Include/pystate.h
36 --- a/Include/pystate.h
37 +++ b/Include/pystate.h
38 @@ -177,20 +177,13 @@ PyAPI_FUNC(int) PyThreadState_SetAsyncEx
39  /* Variable and macro for in-line access to current thread state */
40  
41  /* Assuming the current thread holds the GIL, this is the
42 -   PyThreadState for the current thread.
43 -
44 -   Issue #23644: pyatomic.h is incompatible with C++ (yet). Disable
45 -   PyThreadState_GET() optimization: declare it as an alias to
46 -   PyThreadState_Get(), as done for limited API. */
47 -#if !defined(Py_LIMITED_API) && !defined(__cplusplus)
48 +   PyThreadState for the current thread. */
49 +#ifdef Py_BUILD_CORE
50  PyAPI_DATA(_Py_atomic_address) _PyThreadState_Current;
51 -#endif
52 -
53 -#if defined(Py_DEBUG) || defined(Py_LIMITED_API) || defined(__cplusplus)
54 -#define PyThreadState_GET() PyThreadState_Get()
55 +#  define PyThreadState_GET() \
56 +             ((PyThreadState*)_Py_atomic_load_relaxed(&_PyThreadState_Current))
57  #else
58 -#define PyThreadState_GET() \
59 -    ((PyThreadState*)_Py_atomic_load_relaxed(&_PyThreadState_Current))
60 +#  define PyThreadState_GET() PyThreadState_Get()
61  #endif
62  
63  typedef
64 diff --git a/Misc/NEWS b/Misc/NEWS
65 --- a/Misc/NEWS
66 +++ b/Misc/NEWS
67 @@ -11,6 +11,10 @@ Release date: TBA
68  Core and Builtins
69  -----------------
70  
71 +- Issue #25150: Hide the private _Py_atomic_xxx symbols from the public
72 +  Python.h header to fix a compilation error with OpenMP. PyThreadState_GET()
73 +  becomes an alias to PyThreadState_Get() to avoid ABI incompatibilies.
74 +
75  Library
76  -------
77  
78
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