From 0514227d2547793b23e209809276375e41c76617 Mon Sep 17 00:00:00 2001 From: Abseil Team Date: Tue, 26 Nov 2019 09:00:19 -0800 Subject: Export of internal Abseil changes -- 2ba0e41a21fbdab36b2f4f3b0dd4b112bd788604 by Derek Mauro : Remove the include of , which is missing on some versions of MinGW. DWORD is easily replaced by uint32_t. PiperOrigin-RevId: 282576177 -- 238fd41114b3e83fcb91d2afe1e6dcce7cfd53b0 by Samuel Benzaquen : Remove assertion in erase(iterator) that tries to use the comparator. Add missing this-> qualifier. Fix bug where node elements are not being destroyed properly. PiperOrigin-RevId: 282427096 -- 6b9446e3b38ed97451c010933e86a572ab659ab2 by Derek Mauro : Improves/fixes feature detection in thread_identity Only use ABSL_PER_THREAD_TLS_KEYWORD when it is supported (previously on some platforms it evaluated to nothing, which completely breaks everything), but prefer it to thread_local since benchmarks indicate it is slightly faster in this critical code path. Disable the calls to pthread_sigmask on MinGW where it is not supported. PiperOrigin-RevId: 282425291 GitOrigin-RevId: 2ba0e41a21fbdab36b2f4f3b0dd4b112bd788604 Change-Id: I34073ecbb4a43ad71f54161c136d88fc728888f1 --- absl/base/internal/thread_identity.cc | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) (limited to 'absl/base/internal/thread_identity.cc') diff --git a/absl/base/internal/thread_identity.cc b/absl/base/internal/thread_identity.cc index 91273a6..0ea159c 100644 --- a/absl/base/internal/thread_identity.cc +++ b/absl/base/internal/thread_identity.cc @@ -55,7 +55,12 @@ void AllocateThreadIdentityKey(ThreadIdentityReclaimerFunction reclaimer) { #ifdef __GNUC__ __attribute__((visibility("protected"))) #endif // __GNUC__ - ABSL_PER_THREAD_TLS_KEYWORD ThreadIdentity* thread_identity_ptr; +#if ABSL_PER_THREAD_TLS +// Prefer __thread to thread_local as benchmarks indicate it is a bit faster. +ABSL_PER_THREAD_TLS_KEYWORD ThreadIdentity* thread_identity_ptr = nullptr; +#elif defined(ABSL_HAVE_THREAD_LOCAL) +thread_local ThreadIdentity* thread_identity_ptr = nullptr; +#endif // ABSL_PER_THREAD_TLS #endif // TLS or CPP11 void SetCurrentThreadIdentity( @@ -69,8 +74,8 @@ void SetCurrentThreadIdentity( absl::call_once(init_thread_identity_key_once, AllocateThreadIdentityKey, reclaimer); -#ifdef __EMSCRIPTEN__ - // Emscripten PThread implementation does not support signals. +#if defined(__EMSCRIPTEN__) || defined(__MINGW32__) + // Emscripten and MinGW pthread implementations does not support signals. // See https://kripken.github.io/emscripten-site/docs/porting/pthreads.html // for more information. pthread_setspecific(thread_identity_pthread_key, @@ -89,7 +94,7 @@ void SetCurrentThreadIdentity( pthread_setspecific(thread_identity_pthread_key, reinterpret_cast(identity)); pthread_sigmask(SIG_SETMASK, &curr_signals, nullptr); -#endif // !__EMSCRIPTEN__ +#endif // !__EMSCRIPTEN__ && !__MINGW32__ #elif ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS // NOTE: Not async-safe. But can be open-coded. -- cgit v1.2.3