diff options
Diffstat (limited to 'libstdc++-v3/src/c++11/compatibility-chrono.cc')
| -rw-r--r-- | libstdc++-v3/src/c++11/compatibility-chrono.cc | 87 |
1 files changed, 59 insertions, 28 deletions
diff --git a/libstdc++-v3/src/c++11/compatibility-chrono.cc b/libstdc++-v3/src/c++11/compatibility-chrono.cc index ada0946619b..fd67daec4c5 100644 --- a/libstdc++-v3/src/c++11/compatibility-chrono.cc +++ b/libstdc++-v3/src/c++11/compatibility-chrono.cc @@ -22,37 +22,68 @@ // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. -#define _GLIBCXX_COMPATIBILITY_CXX0X #include <bits/c++config.h> -#if defined(_GLIBCXX_SYMVER_GNU) && defined(_GLIBCXX_SHARED) \ - && defined(_GLIBCXX_HAVE_AS_SYMVER_DIRECTIVE)\ - && defined(_GLIBCXX_HAVE_SYMVER_SYMBOL_RENAMING_RUNTIME_SUPPORT) +#ifdef _GLIBCXX_USE_C99_STDINT_TR1 +#ifdef _GLIBCXX_USE_GETTIMEOFDAY +#include <sys/time.h> +#endif + +#define system_clock system_clockXX #define steady_clock steady_clockXX -#include "chrono.cc" - -// The rename syntax for default exported names is -// asm (".symver name1,exportedname@GLIBCXX_3.4.17") -// asm (".symver name2,exportedname@@GLIBCXX_3.4.19") -// In the future, GLIBCXX_ABI > 6 should remove all uses of -// _GLIBCXX_*_SYMVER macros in this file. - -#define _GLIBCXX_3_4_17_SYMVER(XXname, name) \ - extern "C" void \ - _X##name() \ - __attribute__ ((alias(#XXname))); \ - asm (".symver " "_X" #name "," #name "@GLIBCXX_3.4.17"); - -#define _GLIBCXX_3_4_19_SYMVER(XXname, name) \ - extern "C" void \ - _Y##name() \ - __attribute__ ((alias(#XXname))); \ - asm (".symver " "_Y" #name "," #name "@@GLIBCXX_3.4.19"); - -_GLIBCXX_3_4_17_SYMVER(_ZNSt6chrono14steady_clockXX3nowEv, - _ZNSt6chrono12steady_clock3nowEv) -_GLIBCXX_3_4_19_SYMVER(_ZNSt6chrono14steady_clockXX3nowEv, - _ZNSt6chrono12steady_clock3nowEv) +#include <chrono> +#undef system_clock +#undef steady_clock +namespace std _GLIBCXX_VISIBILITY(default) +{ + namespace chrono + { + _GLIBCXX_BEGIN_NAMESPACE_VERSION + + // NB: Default configuration was no realtime. + struct system_clock + { +#ifdef _GLIBCXX_USE_GETTIMEOFDAY + typedef chrono::microseconds duration; +#else + typedef chrono::seconds duration; #endif + + typedef duration::rep rep; + typedef duration::period period; + typedef chrono::time_point<system_clock, duration> time_point; + + static_assert(system_clock::duration::min() + < system_clock::duration::zero(), + "a clock's minimum duration cannot be less than its epoch"); + + static constexpr bool is_steady = false; + + static time_point + now() noexcept; + }; + + constexpr bool system_clock::is_steady; + + system_clock::time_point + system_clock::now() noexcept + { +#ifdef _GLIBCXX_USE_GETTIMEOFDAY + timeval tv; + // EINVAL, EFAULT + gettimeofday(&tv, 0); + return time_point(duration(chrono::seconds(tv.tv_sec) + + chrono::microseconds(tv.tv_usec))); +#else + std::time_t __sec = std::time(0); + return system_clock::from_time_t(__sec); +#endif + } + + _GLIBCXX_END_NAMESPACE_VERSION + } // namespace chrono +} // namespace std + +#endif // _GLIBCXX_USE_C99_STDINT_TR1 |
