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re PR libstdc++/46914 (std::atomic<int*>::exchange(...) doesn't store correct value.) 

2011-02-01  Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/46914
	* include/bits/atomic_0.h (_ATOMIC_STORE_, _ATOMIC_MODIFY_,
	_ATOMIC_CMPEXCHNG_): Rename __v -> __w, and __m -> __n, to
	avoid name conflicts.

From-SVN: r169494
This commit is contained in:
Paolo Carlini 2011-02-01 18:15:39 +00:00 committed by Paolo Carlini
parent 04f089357e
commit 72660097ec
2 changed files with 21 additions and 14 deletions
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7
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,10 @@
2011-02-01 Paolo Carlini <paolo.carlini@oracle.com>
PR libstdc++/46914
* include/bits/atomic_0.h (_ATOMIC_STORE_, _ATOMIC_MODIFY_,
_ATOMIC_CMPEXCHNG_): Rename __v -> __w, and __m -> __n, to
avoid name conflicts.
2011-02-01 Benjamin Kosnik <bkoz@redhat.com>
PR libstdc++/47560

28
libstdc++-v3/include/bits/atomic_0.h
View File

@ -1,6 +1,6 @@
// -*- C++ -*- header.
// Copyright (C) 2008, 2009, 2010
// Copyright (C) 2008, 2009, 2010, 2011
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
@ -68,41 +68,41 @@ namespace __atomic0
atomic_flag_clear_explicit(__g, __x); \
__r; })
#define _ATOMIC_STORE_(__a, __m, __x) \
#define _ATOMIC_STORE_(__a, __n, __x) \
({typedef __typeof__(_ATOMIC_MEMBER_) __i_type; \
__i_type* __p = &_ATOMIC_MEMBER_; \
__typeof__(__m) __v = (__m); \
__typeof__(__n) __w = (__n); \
__atomic_flag_base* __g = __atomic_flag_for_address(__p); \
__atomic_flag_wait_explicit(__g, __x); \
*__p = __v; \
*__p = __w; \
atomic_flag_clear_explicit(__g, __x); \
__v; })
__w; })
#define _ATOMIC_MODIFY_(__a, __o, __m, __x) \
#define _ATOMIC_MODIFY_(__a, __o, __n, __x) \
({typedef __typeof__(_ATOMIC_MEMBER_) __i_type; \
__i_type* __p = &_ATOMIC_MEMBER_; \
__typeof__(__m) __v = (__m); \
__typeof__(__n) __w = (__n); \
__atomic_flag_base* __g = __atomic_flag_for_address(__p); \
__atomic_flag_wait_explicit(__g, __x); \
__i_type __r = *__p; \
*__p __o __v; \
*__p __o __w; \
atomic_flag_clear_explicit(__g, __x); \
__r; })
#define _ATOMIC_CMPEXCHNG_(__a, __e, __m, __x) \
#define _ATOMIC_CMPEXCHNG_(__a, __e, __n, __x) \
({typedef __typeof__(_ATOMIC_MEMBER_) __i_type; \
__i_type* __p = &_ATOMIC_MEMBER_; \
__typeof__(__e) __q = (__e); \
__typeof__(__m) __v = (__m); \
__typeof__(__n) __w = (__n); \
bool __r; \
__atomic_flag_base* __g = __atomic_flag_for_address(__p); \
__atomic_flag_wait_explicit(__g, __x); \
__i_type __t = *__p; \
if (*__q == __t) \
{ \
*__p = (__i_type)__v; \
__r = true; \
} \
{ \
*__p = (__i_type)__w; \
__r = true; \
} \
else { *__q = __t; __r = false; } \
atomic_flag_clear_explicit(__g, __x); \
__r; })