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| author | Jonathan Wakely <jwakely@redhat.com> | 2023-09-15 13:43:43 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2023-09-15 21:57:41 +0100 |
| commit | c4baeaecbbf7d0626d44ac0b69b3c8456dddb01a (patch) | |
| tree | 1b921a92b810e0e0ddf455ab9456d9726347db3d /libstdc++-v3/config.h.in | |
| parent | a923c52920d2f5c6cbd486f465dc4aec2d1f9544 (diff) | |
| download | gcc-c4baeaecbbf7d0626d44ac0b69b3c8456dddb01a.zip gcc-c4baeaecbbf7d0626d44ac0b69b3c8456dddb01a.tar.gz gcc-c4baeaecbbf7d0626d44ac0b69b3c8456dddb01a.tar.bz2 | |
libstdc++: Implement C++26 native handles for file streams (P1759R6)
The new __basic_file::native_handle() function can be added for C++11
and above, because the names "native_handle" and "native_handle_type"
are already reserved since C++11. Exporting those symbols from the
shared library does no harm, even if the feature gets dropped before the
C++23 standard is final.
The new member functions of std::fstream etc. are only declared for
C++26 and so are not instantiated in src/c++11/fstream-inst.cc. Declare
them with the always_inline attribute so that no symbol definitions are
needed in the library (we can change this later when C++26 support is
less experimental).
libstdc++-v3/ChangeLog:
* acinclude.m4 (GLIBCXX_CHECK_FILEBUF_NATIVE_HANDLES): New
macro.
* config.h.in: Regenerate.
* config/abi/pre/gnu.ver (GLIBCXX_3.4.32): Export new
basic_filebuf members.
* config/io/basic_file_stdio.cc (__basic_file::native_handle):
Define new function.
* config/io/basic_file_stdio.h (__basic_file::native_handle):
Declare new function.
* configure: Regenerate.
* configure.ac: Use GLIBCXX_CHECK_FILEBUF_NATIVE_HANDLES.
* include/bits/version.def (fstream_native_handles): New macro.
* include/bits/version.h: Regenerate.
* include/std/fstream (basic_filebuf::native_handle)
(basic_fstream::native_handle, basic_ifstream::native_handle)
(basic_ofstream::native_handle): New functions.
* src/c++11/Makefile.am: Move compilation of basic_file.cc,
locale_init.cc and localename.cc to here.
* src/c++11/Makefile.in: Regenerate.
* src/c++98/locale_init.cc: Moved to...
* src/c++11/locale_init.cc: ...here.
* src/c++98/localename.cc: Moved to...
* src/c++11/localename.cc: ...here.
* src/c++98/Makefile.am: Remove basic_file.cc, locale_init.cc
and localename.cc from here.
* src/c++98/Makefile.in: Regenerate.
* testsuite/27_io/basic_filebuf/native_handle/version.cc: New test.
* testsuite/27_io/basic_fstream/native_handle/char/1.cc: New test.
* testsuite/27_io/basic_fstream/native_handle/wchar_t/1.cc: New test.
* testsuite/27_io/basic_ifstream/native_handle/char/1.cc: New test.
* testsuite/27_io/basic_ifstream/native_handle/wchar_t/1.cc: New test.
* testsuite/27_io/basic_ofstream/native_handle/char/1.cc: New test.
* testsuite/27_io/basic_ofstream/native_handle/wchar_t/1.cc: New test.
Diffstat (limited to 'libstdc++-v3/config.h.in')
| -rw-r--r-- | libstdc++-v3/config.h.in | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in index 0abe62a..4af7339 100644 --- a/libstdc++-v3/config.h.in +++ b/libstdc++-v3/config.h.in @@ -1095,6 +1095,9 @@ /* Defined if Sleep exists. */ #undef _GLIBCXX_USE_WIN32_SLEEP +/* Define if _get_osfhandle should be used for filebuf::native_handle(). */ +#undef _GLIBCXX_USE__GET_OSFHANDLE + /* Define to 1 if a verbose library is built, or 0 otherwise. */ #undef _GLIBCXX_VERBOSE |