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atomic_base.h (__calculate_memory_order): Rename to... 

* include/bits/atomic_base.h (__calculate_memory_order): Rename to...
	(__cmpexch_failure_order): This, and rewrite as constexpr function.
	(compare_exchange_strong, compare_exchange_weak): Use it.
	* include/std/atomic (compare_exchange_strong, compare_exchange_weak):
	Likewise.

From-SVN: r182105
This commit is contained in:
Jonathan Wakely 2011-12-08 09:44:57 +00:00 committed by Jonathan Wakely
parent 908b951938
commit 3d0c32fe56
3 changed files with 21 additions and 15 deletions
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8
libstdc++-v3/ChangeLog
View File

@ -1,3 +1,11 @@
2011-12-08 Jonathan Wakely <jwakely.gcc@gmail.com>
* include/bits/atomic_base.h (__calculate_memory_order): Rename to...
(__cmpexch_failure_order): This, and rewrite as constexpr function.
(compare_exchange_strong, compare_exchange_weak): Use it.
* include/std/atomic (compare_exchange_strong, compare_exchange_weak):
Likewise.
2011-12-07 François Dumont <fdumont@gcc.gnu.org>
PR libstdc++/51386

20
libstdc++-v3/include/bits/atomic_base.h
View File

@ -59,14 +59,12 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
memory_order_seq_cst
} memory_order;
inline memory_order
__calculate_memory_order(memory_order __m) noexcept
// Drop release ordering as per [atomics.types.operations.req]/21
constexpr memory_order
__cmpexch_failure_order(memory_order __m) noexcept
{
const bool __cond1 = __m == memory_order_release;
const bool __cond2 = __m == memory_order_acq_rel;
memory_order __mo1(__cond1 ? memory_order_relaxed : __m);
memory_order __mo2(__cond2 ? memory_order_acquire : __mo1);
return __mo2;
return __m == memory_order_acq_rel ? memory_order_acquire
: __m == memory_order_release ? memory_order_relaxed : __m;
}
inline void
@ -505,7 +503,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
memory_order __m = memory_order_seq_cst) noexcept
{
return compare_exchange_weak(__i1, __i2, __m,
__calculate_memory_order(__m));
__cmpexch_failure_order(__m));
}
bool
@ -513,7 +511,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
memory_order __m = memory_order_seq_cst) volatile noexcept
{
return compare_exchange_weak(__i1, __i2, __m,
__calculate_memory_order(__m));
__cmpexch_failure_order(__m));
}
bool
@ -544,7 +542,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
memory_order __m = memory_order_seq_cst) noexcept
{
return compare_exchange_strong(__i1, __i2, __m,
__calculate_memory_order(__m));
__cmpexch_failure_order(__m));
}
bool
@ -552,7 +550,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
memory_order __m = memory_order_seq_cst) volatile noexcept
{
return compare_exchange_strong(__i1, __i2, __m,
__calculate_memory_order(__m));
__cmpexch_failure_order(__m));
}
__int_type

8
libstdc++-v3/include/std/atomic
View File

@ -408,7 +408,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
memory_order __m = memory_order_seq_cst) noexcept
{
return compare_exchange_weak(__p1, __p2, __m,
__calculate_memory_order(__m));
__cmpexch_failure_order(__m));
}
bool
@ -416,7 +416,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
memory_order __m = memory_order_seq_cst) volatile noexcept
{
return compare_exchange_weak(__p1, __p2, __m,
__calculate_memory_order(__m));
__cmpexch_failure_order(__m));
}
bool
@ -435,7 +435,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
memory_order __m = memory_order_seq_cst) noexcept
{
return _M_b.compare_exchange_strong(__p1, __p2, __m,
__calculate_memory_order(__m));
__cmpexch_failure_order(__m));
}
bool
@ -443,7 +443,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
memory_order __m = memory_order_seq_cst) volatile noexcept
{
return _M_b.compare_exchange_strong(__p1, __p2, __m,
__calculate_memory_order(__m));
__cmpexch_failure_order(__m));
}
__pointer_type