This function (and the explicit memory over version) are present in both
C++ <atomic> and C <stdatomic.h>, so should be in C++ <stdatomic.h> too.
There is a library issue incoming for this, but the resolution is
obvious.
libstdc++-v3/ChangeLog:
* include/c_compatibility/stdatomic.h (atomic_fetch_xor): Add
using-declaration.
(atomic_fetch_xor_explicit): Likewise.
* testsuite/29_atomics/headers/stdatomic.h/c_compat.cc: Check
arithmetic and logical operations for atomic_int.
This adds the C++23 <stdatomic.h> header, as proposed by P0943R6, for
compatibility with C code.
There are still some ABI differences between atomic_xxx in C and C++
std::atomic_xxx in C++, so this only provides source compatibility, not
binary compatibility.
libstdc++-v3/ChangeLog:
* include/Makefile.am: Install new header.
* include/Makefile.in: Regenerate.
* include/c_compatibility/stdatomic.h: New file.
* testsuite/29_atomics/headers/stdatomic.h/c_compat.cc: New test.
This was an oversight in the original commit adding wait/notify
to atomic<T>.
libstdc++-v3/ChangeLog:
PR libstdc++/102994
* include/bits/atomic_base.h (__atomic_base<_PTp*>::wait()):
Add const qualifier.
* include/std/atomic (atomic<_Tp*>::wait(), atomic_wait()):
Likewise.
* testsuite/29_atomics/atomic/wait_notify/102994.cc:
New test.
Remove UB in atomic_ref/wait_notify test.
Signed-off-by: Thomas Rodgers <trodgers@redhat.com>
libstdc++-v3/ChangeLog:
PR libstdc++/101761
* testsuite/29_atomics/atomic_ref/wait_notify.cc (test): Use
va and vb as arguments to wait/notify, remove unused bb local.
Fixes a regression on arm32 targets.
libstdc++-v3/ChangeLog:
* testsuite/29_atomics/atomic_ref/wait_notify.cc: Guard
test logic with constexpr check for is_always_lock_free.
libstdc++-v3/ChangeLog:
PR libstdc++/100889
* include/bits/atomic_base.h (atomic_ref<_Tp*>::wait):
Change parameter type from _Tp to _Tp*.
* testsuite/29_atomics/atomic_ref/wait_notify.cc: Extend
coverage of types tested.
Fixes https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100334
libstdc++-v3/ChangeLog:
* include/bits/atomic_wait.h (__waiter::_M_do_wait_v): loop
until value change observed.
(__waiter_base::_M_laundered): New member.
(__waiter_base::_M_notify): Check _M_laundered to determine
whether to wake one or all.
(__detail::__atomic_compare): Return true if call to
__builtin_memcmp() == 0.
(__waiter_base::_S_do_spin_v): Adjust predicate.
* testsuite/29_atomics/atomic/wait_notify/100334.cc: New
test.
gcc on ia32 miscompiles various atomics involving floating point,
unfortunately I'm afraid it is too late to fix that for 11.1 and
as I'm quite lost on it, it might take a while for 12 too
(disabling all the 8 peephole2s would be easiest, but then we'd
run into optimization regressions).
While 1.cc just FAILs, with dejagnu 1.6.1 wait_notify.cc hangs the
make check even after the timeout fires. The following patch therefore
xfails the former and skips the latter.
Tested on x86_64-linux where
make check RUNTESTFLAGS='conformance.exp=atomic_float/*.cc'
is still
=== libstdc++ Summary ===
# of expected passes 8
and on i686-linux, where it is now
=== libstdc++ Summary ===
# of expected passes 5
# of expected failures 1
# of unsupported tests 1
2021-04-22 Jakub Jelinek <jakub@redhat.com>
PR target/100182
* testsuite/29_atomics/atomic_float/1.cc: Add dg-xfail-run-if for
ia32.
* testsuite/29_atomics/atomic_float/wait_notify.cc: Add dg-skip-if for
ia32.
This is a substantial rewrite of the atomic wait/notify (and timed wait
counterparts) implementation.
The previous __platform_wait looped on EINTR however this behavior is
not required by the standard. A new _GLIBCXX_HAVE_PLATFORM_WAIT macro
now controls whether wait/notify are implemented using a platform
specific primitive or with a platform agnostic mutex/condvar. This
patch only supplies a definition for linux futexes. A future update
could add support __ulock_wait/wake on Darwin, for instance.
The members of __waiters were lifted to a new base class. The members
are now arranged such that overall sizeof(__waiter_pool_base) fits in
two cache lines (on platforms with at least 64 byte cache lines). The
definition will also use destructive_interference_size for this if it is
available.
The __waiters type is now specific to untimed waits, and is renamed to
__waiter_pool. Timed waits have a corresponding __timed_waiter_pool
type. Much of the code has been moved from the previous __atomic_wait()
free function to the __waiter_base template and a __waiter derived type
is provided to implement the un-timed wait operations. A similar change
has been made to the timed wait implementation.
The __atomic_spin code has been extended to take a spin policy which is
invoked after the initial busy wait loop. The default policy is to
return from the spin. The timed wait code adds a timed backoff spinning
policy. The code from <thread> which implements this_thread::sleep_for,
sleep_until has been moved to a new <bits/std_thread_sleep.h> header
which allows the thread sleep code to be consumed without pulling in the
whole of <thread>.
The entry points into the wait/notify code have been restructured to
support either -
* Testing the current value of the atomic stored at the given address
and waiting on a notification.
* Applying a predicate to determine if the wait was satisfied.
The entry points were renamed to make it clear that the wait and wake
operations operate on addresses. The first variant takes the expected
value and a function which returns the current value that should be used
in comparison operations, these operations are named with a _v suffix
(e.g. 'value'). All atomic<_Tp> wait/notify operations use the first
variant. Barriers, latches and semaphores use the predicate variant.
This change also centralizes what it means to compare values for the
purposes of atomic<T>::wait rather than scattering through individual
predicates.
This change also centralizes the repetitive code which adjusts for
different user supplied clocks (this should be moved elsewhere
and all such adjustments should use a common implementation).
This change also removes the hashing of the pointer and uses
the pointer value directly for indexing into the waiters table.
libstdc++-v3/ChangeLog:
* include/Makefile.am: Add new <bits/this_thread_sleep.h> header.
* include/Makefile.in: Regenerate.
* include/bits/this_thread_sleep.h: New file.
* include/bits/atomic_base.h: Adjust all calls
to __atomic_wait/__atomic_notify for new call signatures.
* include/bits/atomic_timed_wait.h: Extensive rewrite.
* include/bits/atomic_wait.h: Likewise.
* include/bits/semaphore_base.h: Adjust all calls
to __atomic_wait/__atomic_notify for new call signatures.
* include/std/atomic: Likewise.
* include/std/barrier: Likewise.
* include/std/latch: Likewise.
* include/std/semaphore: Likewise.
* include/std/thread (this_thread::sleep_for)
(this_thread::sleep_until): Move to new header.
* testsuite/29_atomics/atomic/wait_notify/bool.cc: Simplify
test.
* testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
* testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
* testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
* testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
* testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
* testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
-fcf-protection is automatically enabled in libstdc++ on Linux/x86.
Starting from
commit 77d372abec
Author: H.J. Lu <hjl.tools@gmail.com>
Date: Thu Jan 14 05:56:46 2021 -0800
x86: Error on -fcf-protection with incompatible target
GCC issues an error on -fcf-protection with incompatible target:
... -fcf-protection ... libstdc++-v3/testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc -m32 -O2 -g0 -fno-exceptions -fno-asynchronous-unwind-tables -march=i486 ...
cc1plus: error: '-fcf-protection' is not compatible with this target
FAIL: 29_atomics/atomic_flag/test_and_set/explicit-hle.cc (test for excess errors)
Add -fcf-protection=none to -march=i486 to compile explicit-hle.cc.
* testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc:
Add -fcf-protection=none to -march=i486.
Adds __cpp_lib_atomic_wait feature test macro which was overlooked in
the initial commit of this feature. Replaces uses of
_GLIBCXX_HAVE_ATOMIC_WAIT.
libstdc++-v3/ChangeLog:
* include/bits/atomic_base.h: Replace usage of
_GLIBCXX_HAVE_ATOMIC_WAIT with __cpp_lib_atomic_wait.
* include/bits/atomic_timed_wait.h: Likewise.
* include/bits/atomic_wait.h: Define __cpp_lib_atomic_wait
feature test macro.
* include/bits/semaphore_base.h: Replace usage of
_GLIBCXX_HAVE_ATOMIC_WAIT with __cpp_lib_atomic_wait.
* include/std/atomic: Likewise.
* include/std/latch: Likewise.
* include/std/semaphore: Likewise.
* include/std/version: Define __cpp_lib_atomic wait
feature test macro and replace usage of
_GLIBCXX_HAVE_ATOMIC_WAIT.
* testsuite/29_atomics/atomic/wait_notify/1.cc: New test.
* testsuite/29_atomics/atomic/wait_notify/2.cc: Likewise.
The missed notifications fixed in r11-5383 also happen in some other
tests which have similar code.
libstdc++-v3/ChangeLog:
PR libstdc++/97936
* testsuite/29_atomics/atomic/wait_notify/bool.cc: Fix missed
notifications by making the new thread wait until the parent
thread is waiting on the condition variable.
* testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
* testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
* testsuite/29_atomics/atomic_ref/wait_notify.cc: Likewise.
This fixes a race condition in the util/atomic/wait_notify_util.h header
used by several tests, which should make the tests work properly.
libstdc++-v3/ChangeLog:
PR libstdc++/97936
* testsuite/29_atomics/atomic/wait_notify/bool.cc: Re-eneable
test.
* testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
* testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
* testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
* testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
* testsuite/29_atomics/atomic_integral/wait_notify.cc: Likewise.
* testsuite/util/atomic/wait_notify_util.h: Fix missed
notifications by making the new thread wait until the parent
thread is waiting on the condition variable.
These tests are unstable and causing failures due to timeouts. Disable
them until the cause can be found, so that testing doesn't have to wait
for them to timeout.
libstdc++-v3/ChangeLog:
PR libstdc++/97936
PR libstdc++/97944
* testsuite/29_atomics/atomic_integral/wait_notify.cc: Disable.
Do not require pthreads, but add -pthread when appropriate.
* testsuite/30_threads/jthread/95989.cc: Likewise.
* testsuite/30_threads/latch/3.cc: Likewise.
* testsuite/30_threads/semaphore/try_acquire_until.cc: Likewise.
This fixes some UNRESOLVED tests on (at least) Solaris and Darwin, and
disables some tests that hang forever on Solaris. A proper fix is still
needed.
libstdc++-v3/ChangeLog:
* include/bits/atomic_base.h (atomic_flag::wait): Use correct
type for __atomic_wait call.
* include/bits/atomic_timed_wait.h (__atomic_wait_until): Check
_GLIBCXX_HAVE_LINUX_FUTEX.
* include/bits/atomic_wait.h (__atomic_notify): Likewise.
* include/bits/semaphore_base.h (_GLIBCXX_HAVE_POSIX_SEMAPHORE):
Only define if SEM_VALUE_MAX or _POSIX_SEM_VALUE_MAX is defined.
* testsuite/29_atomics/atomic/wait_notify/bool.cc: Disable on
non-linux targes.
* testsuite/29_atomics/atomic/wait_notify/generic.cc: Likewise.
* testsuite/29_atomics/atomic/wait_notify/pointers.cc: Likewise.
* testsuite/29_atomics/atomic_flag/wait_notify/1.cc: Likewise.
* testsuite/29_atomics/atomic_float/wait_notify.cc: Likewise.
This fixes a linker error for older ARM cores without 64-bit atomics.
I think the { dg-add-options libatomic } is no longer needed, but it's
harmless to keep it there.
libstdc++-v3/ChangeLog:
* testsuite/29_atomics/atomic_float/value_init.cc: Use float
instead of double so that __atomic_load_8 isn't needed.
atomic_float/value_init.cc requires libatomic for some targets, i.e., when
it tries to perform an atomic operation with a 64 bit floating point
double type on a 32 bit target. This patch adds AIX and Darwin to the
list of targets that require the libatomic option and adds the option to
the atomic_float/value_init.cc testcase.
libstdc++-v3/ChangeLog:
2020-07-28 David Edelsohn <dje.gcc@gmail.com>
Jonathan Wakely <jwakely@redhat.com>
Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE>
* testsuite/lib/dg-options.exp (add_options_for_libatomic): Add
target powerpc-ibm-aix* and powerpc*-*-darwin*.
* testsuite/29_atomics/atomic_float/value_init.cc: Add options
for libatomic.
These tests verify that including C++11 headers fails to compile in
C++98 mode. They use { dg-options "-std=gnu++98" } so that they are
explicitly run in C++98 mode. This change also adds a target selector so
that the tests will be skipped even if the dg-options directive is
filtered out or overridden. This is in preparation for a desired future
change where tests do not use -std options, so that they can be tested
with e.g. --target_board=unix\"{-std=gnu++17,-std=gnu++20}\"
In some cases the dg-options and dg-do directives need to be reordered,
so that the -std=gnu++98 option is already added to the options before
the target selector is checked.
libstdc++-v3/ChangeLog:
* testsuite/18_support/headers/cstdalign/std_c++0x_neg.cc: Add
c++98_only target selector.
* testsuite/18_support/headers/cstdbool/std_c++0x_neg.cc:
Likewise.
* testsuite/18_support/headers/cstdint/std_c++0x_neg.cc:
Likewise.
* testsuite/18_support/headers/new/synopsis_cxx98.cc: Likewise.
* testsuite/19_diagnostics/headers/system_error/std_c++0x_neg.cc:
Likewise.
* testsuite/20_util/headers/type_traits/std_c++0x_neg.cc:
Likewise.
* testsuite/23_containers/headers/array/std_c++0x_neg.cc:
Likewise.
* testsuite/23_containers/headers/tuple/std_c++0x_neg.cc:
Likewise.
* testsuite/23_containers/headers/unordered_map/std_c++0x_neg.cc:
Likewise.
* testsuite/23_containers/headers/unordered_set/std_c++0x_neg.cc:
Likewise.
* testsuite/26_numerics/headers/ccomplex/std_c++0x_neg.cc:
Likewise.
* testsuite/26_numerics/headers/cfenv/std_c++0x_neg.cc:
Likewise.
* testsuite/26_numerics/headers/cmath/c99_classification_macros_c++98.cc:
Likewise.
* testsuite/26_numerics/headers/ctgmath/std_c++0x_neg.cc:
Likewise.
* testsuite/26_numerics/headers/random/std_c++0x_neg.cc:
Likewise.
* testsuite/27_io/headers/cinttypes/std_c++0x_neg.cc: Likewise.
* testsuite/28_regex/headers/regex/std_c++0x_neg.cc: Likewise.
* testsuite/29_atomics/headers/atomic/std_c++0x_neg.cc:
Likewise.
* testsuite/30_threads/headers/condition_variable/std_c++0x_neg.cc:
Likewise.
* testsuite/30_threads/headers/future/std_c++0x_neg.cc:
Likewise.
* testsuite/30_threads/headers/mutex/std_c++0x_neg.cc: Likewise.
* testsuite/30_threads/headers/thread/std_c++0x_neg.cc:
Likewise.
These tests fail with AIX double double. Use different floating point
values that behave less surprisingly.
libstdc++-v3/ChangeLog:
PR libstdc++/91153
PR target/93224
* testsuite/29_atomics/atomic_float/1.cc: Use different values
for tests.
* testsuite/29_atomics/atomic_ref/float.cc: Likewise.
C++20 adds some new preconditions to std::atomic, which weren't
previously checked by our implementation.
* include/std/atomic (atomic): Add static assertions.
* testsuite/29_atomics/atomic/requirements/types_neg.cc: New test.
The tests for clear() and test_and_set() didn't cover all cases.
* testsuite/29_atomics/atomic_flag/clear/1.cc: Also test clear()
when the value is currently set.
* testsuite/29_atomics/atomic_flag/test_and_set/explicit.cc:
Actually check the return value.
* testsuite/29_atomics/atomic_flag/test_and_set/implicit.cc:
Likewise.
Also fix the tests so they run without an explicit -std=gnu++2a in the
RUNTESTFLAGS, and test the new function on const-qualified objects.
* include/bits/atomic_base.h (atomic_flag::test): Add missing
const qualifiers.
* testsuite/29_atomics/atomic_flag/test/explicit.cc: Add
dg-options and verify results of test function.
* testsuite/29_atomics/atomic_flag/test/implicit.cc: Likewise.
PR libstdc++/95282
* include/bits/atomic_base.h (__atomic_impl::load): Add
cv-qualifiers to parameter so that _Tp is deduced as the
unqualified type.
* testsuite/29_atomics/atomic_float/95282.cc: New test.
This implements the new requirements for C++20 that std::atomic should
initialize the atomic variable in its default constructor.
This patch does not add the deprecated attribute to atomic_init, but
that should be done at some point as it's deprecated in C++20.
The paper also deprecates the ATOMIC_FLAG_INIT macro, although we can't
apply the deprecated attribute to a macro.
PR libstdc++/58605
* include/bits/atomic_base.h (__cpp_lib_atomic_value_initialization):
Define.
(__atomic_flag_base, __atomic_base, __atomic_base<_PTp*>)
(__atomic_float): Add default member initializer for C++20.
* include/std/atomic (atomic): Likewise.
(atomic::atomic()): Remove noexcept-specifier on default constructor.
* include/std/version (__cpp_lib_atomic_value_initialization): Define.
* testsuite/29_atomics/atomic/cons/assign_neg.cc: Adjust dg-error line
number.
* testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
* testsuite/29_atomics/atomic/cons/value_init.cc: New test.
* testsuite/29_atomics/atomic_flag/cons/value_init.cc: New test.
* testsuite/29_atomics/atomic_flag/requirements/trivial.cc: Adjust
expected result for is_trivially_default_constructible.
* testsuite/29_atomics/atomic_float/requirements.cc: Likewise.
* testsuite/29_atomics/atomic_float/value_init.cc: New test.
* testsuite/29_atomics/atomic_integral/cons/assign_neg.cc: Likewise.
* testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
* testsuite/29_atomics/atomic_integral/cons/value_init.cc
* testsuite/29_atomics/atomic_integral/requirements/trivial.cc: Adjust
expected results for is_trivially_default_constructible.
* testsuite/util/testsuite_common_types.h (has_trivial_dtor): Add
new test generator.
This adds the new atomic types from C++2a, as proposed by P0019 and
P0020. To reduce duplication the calls to the compiler's atomic
built-ins are wrapped in new functions in the __atomic_impl namespace.
These functions are currently only used by std::atomic<floating-point>
and std::atomic_ref but could also be used for all other specializations
of std::atomic.
* include/bits/atomic_base.h (__atomic_impl): New namespace for
wrappers around atomic built-ins.
(__atomic_float, __atomic_ref): New class templates for use as base
classes.
* include/std/atomic (atomic<float>, atomic<double>)
(atomic<long double>): New explicit specializations.
(atomic_ref): New class template.
(__cpp_lib_atomic_ref): Define.
* include/std/version (__cpp_lib_atomic_ref): Define.
* testsuite/29_atomics/atomic/60695.cc: Adjust dg-error.
* testsuite/29_atomics/atomic_float/1.cc: New test.
* testsuite/29_atomics/atomic_float/requirements.cc: New test.
* testsuite/29_atomics/atomic_ref/deduction.cc: New test.
* testsuite/29_atomics/atomic_ref/float.cc: New test.
* testsuite/29_atomics/atomic_ref/generic.cc: New test.
* testsuite/29_atomics/atomic_ref/integral.cc: New test.
* testsuite/29_atomics/atomic_ref/pointer.cc: New test.
* testsuite/29_atomics/atomic_ref/requirements.cc: New test.
From-SVN: r273420
This is C++ so there's no reason to use macros here.
* testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc: Use
const variables instead of macros.
From-SVN: r269585
2019-03-04 Edward Smith-Rowland <3dw4rd@verizon.net>
PR libstdc++/88996 Implement P0439R0
Make std::memory_order a scoped enumeration.
* include/bits/atomic_base.h: For C++20 make memory_order a scoped enum,
add variables for the old enumerators. Adjust calls.
* testsuite/29_atomics/headers/atomic/types_std_c++2a.cc: New test.
* testsuite/29_atomics/headers/atomic/types_std_c++2a_neg.cc: New test.
From-SVN: r269372
* testsuite/29_atomics/headers/atomic/types_std_c++20.cc: New test.
* testsuite/29_atomics/headers/atomic/types_std_c++20_neg.cc: New
test.
From-SVN: r269091
This patch augments existing tests to validate behavior for char8_t. In
all cases, added test cases are cloned from existing tests for wchar_t
or char16_t.
A few tests required updates to line numbers for diagnostic messages.
2019-02-22 Tom Honermann <tom@honermann.net>
* testsuite/18_support/byte/ops.cc: Validate
std::to_integer<char8_t>, std::to_integer<char16_t>, and
std::to_integer<char32_t>.
* testsuite/18_support/numeric_limits/dr559.cc: Validate
std::numeric_limits<char8_t>.
* testsuite/18_support/numeric_limits/lowest.cc: Validate
std::numeric_limits<char8_t>::lowest().
* testsuite/18_support/numeric_limits/max_digits10.cc: Validate
std::numeric_limits<char8_t>::max_digits10.
* testsuite/18_support/type_info/fundamental.cc: Validate
typeinfo for char8_t.
* testsuite/20_util/from_chars/1_c++20_neg.cc: New test, validating
std::from_chars with char8_t.
* testsuite/20_util/hash/requirements/explicit_instantiation.cc:
Validate explicit instantiation of std::hash<char8_t>.
* testsuite/20_util/is_integral/value.cc: Validate
std::is_integral<char8_t>.
* testsuite/20_util/make_signed/requirements/typedefs-4.cc:
Validate std::make_signed<char8_t>.
* testsuite/21_strings/basic_string/cons/char/deduction.cc:
Validate u8string construction from char8_t sources.
* testsuite/21_strings/basic_string/types/pmr_typedefs.cc: Validate
std::pmr::u8string.
* testsuite/21_strings/basic_string_view/operations/compare/
char/70483.cc: Validate substr operations on u8string_view.
* testsuite/21_strings/basic_string_view/typedefs.cc: Validate that
the u8string_view typedef is defined.
* testsuite/21_strings/char_traits/requirements/
constexpr_functions.cc: Validate char_traits<char8_t> constexpr
member functions.
* testsuite/21_strings/char_traits/requirements/
constexpr_functions_c++17.cc: Validate char_traits<char8_t> C++17
constexpr member functions.
* testsuite/21_strings/headers/string/types_std_c++0x.cc: Validate
that the u8string typedef is defined.
* testsuite/22_locale/locale/cons/unicode.cc: Validate the presence
of the std::codecvt<char16_t, char8_t, std::mbstate_t> and
std::codecvt<char32_t, char8_t, std::mbstate_t> facets.
* testsuite/29_atomics/atomic/cons/assign_neg.cc: Update line
numbers.
* testsuite/29_atomics/atomic/cons/copy_neg.cc: Likewise.
* testsuite/29_atomics/atomic_integral/cons/assign_neg.cc:
Likewise.
* testsuite/29_atomics/atomic_integral/cons/copy_neg.cc: Likewise.
* testsuite/29_atomics/atomic_integral/is_always_lock_free.cc:
Validate std::atomic<char8_t>::is_always_lock_free
* testsuite/29_atomics/atomic_integral/operators/bitwise_neg.cc:
Update line numbers.
* testsuite/29_atomics/atomic_integral/operators/decrement_neg.cc:
Likewise.
* testsuite/29_atomics/atomic_integral/operators/increment_neg.cc:
Likewise.
* testsuite/experimental/polymorphic_allocator/pmr_typedefs_string.cc:
Validate std::experimental::pmr::u8string.
* testsuite/experimental/string_view/typedefs.cc: Validate that the
u8string_view typedef is defined.
* testsuite/util/testsuite_common_types.h: Add char8_t, char16_t and
char32_t to the typelists.
From-SVN: r269089
The restrictions forbidding arithmetic on atomic pointer types are only
enabled for C++17 and later, retaining the GNU extension for older
standards. The new nested typedefs and changes to prevent scalar
parameters participating in template argument deduction are enabled
unconditionally.
PR libstdc++/69769
PR libstdc++/85886
* include/bits/atomic_base.h (__atomic_base::value_type)
(__atomic_base::difference_type): Add new typedefs.
* include/std/atomic (atomic<bool>::value_type, atomic<T>::value_type)
(atomic<T*>::value_type, atomic<T*>::difference_type): Likewise.
(atomic<T*>::operator++, atomic<T*>::operator--)
(atomic<T*>::operator+=, atomic<T*>::operator-=)
(atomic<T*>::fetch_add, atomic<T*>::fetch_sub): Add static assertion
to enforce C++17 requirement on pointer arithmetic.
(__atomic_val_t, __atomic_diff_t): New alias templates.
(atomic_init, atomic_store_explicit, atomic_exchange_explicit)
(atomic_compare_exchange_weak_explicit)
(atomic_compare_exchange_strong_explicit, atomic_store)
(atomic_exchange, atomic_compare_exchange_weak)
(atomic_compare_exchange_strong): Use __atomic_val_t to make
scalar parameters be non-deduced contexts.
(atomic_fetch_add_explicit, atomic_fetch_sub_explicit)
(atomic_fetch_add, atomic_fetch_sub): Change first parameter to be
atomic instead of __atomic_base, and use __atomic_diff_t for scalar
parameters.
(atomic_fetch_and_explicit, atomic_fetch_or_explicit)
(atomic_fetch_xor_explicit, atomic_fetch_and, atomic_fetch_or)
(atomic_fetch_xor): Use __atomic_val_t for scalar parameters.
(atomic_fetch_add_explicit, atomic_fetch_sub_explicit)
(atomic_fetch_add, atomic_fetch_sub): Remove overloads for atomic
address types.
* testsuite/29_atomics/atomic/60695.cc: Adjust dg-error lineno.
* testsuite/29_atomics/atomic/69769.cc: New test.
* testsuite/29_atomics/atomic/nonmembers.cc: New test.
* testsuite/29_atomics/atomic/operators/pointer_partial_void.cc:
Disable test for C++17 and later.
* testsuite/29_atomics/atomic/requirements/typedefs.cc: New test.
* testsuite/29_atomics/atomic_integral/nonmembers.cc: New test.
* testsuite/29_atomics/atomic_integral/requirements/typedefs.cc: New
test.
From-SVN: r260676
