diff options
Diffstat (limited to 'absl/base/internal/thread_identity.h')
| -rw-r--r-- | absl/base/internal/thread_identity.h | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/absl/base/internal/thread_identity.h b/absl/base/internal/thread_identity.h index bb5aa074..ceb109b4 100644 --- a/absl/base/internal/thread_identity.h +++ b/absl/base/internal/thread_identity.h @@ -30,10 +30,11 @@ #include <atomic> #include <cstdint> +#include "absl/base/config.h" #include "absl/base/internal/per_thread_tls.h" namespace absl { -inline namespace lts_2019_08_08 { +ABSL_NAMESPACE_BEGIN struct SynchLocksHeld; struct SynchWaitParams; @@ -209,7 +210,7 @@ void ClearCurrentThreadIdentity(); #error ABSL_THREAD_IDENTITY_MODE cannot be direcly set #elif defined(ABSL_FORCE_THREAD_IDENTITY_MODE) #define ABSL_THREAD_IDENTITY_MODE ABSL_FORCE_THREAD_IDENTITY_MODE -#elif defined(_WIN32) +#elif defined(_WIN32) && !defined(__MINGW32__) #define ABSL_THREAD_IDENTITY_MODE ABSL_THREAD_IDENTITY_MODE_USE_CPP11 #elif ABSL_PER_THREAD_TLS && defined(__GOOGLE_GRTE_VERSION__) && \ (__GOOGLE_GRTE_VERSION__ >= 20140228L) @@ -225,11 +226,26 @@ void ClearCurrentThreadIdentity(); #if ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_TLS || \ ABSL_THREAD_IDENTITY_MODE == ABSL_THREAD_IDENTITY_MODE_USE_CPP11 -extern ABSL_PER_THREAD_TLS_KEYWORD ThreadIdentity* thread_identity_ptr; +#if ABSL_PER_THREAD_TLS +ABSL_CONST_INIT extern ABSL_PER_THREAD_TLS_KEYWORD ThreadIdentity* + thread_identity_ptr; +#elif defined(ABSL_HAVE_THREAD_LOCAL) +ABSL_CONST_INIT extern thread_local ThreadIdentity* thread_identity_ptr; +#else +#error Thread-local storage not detected on this platform +#endif +// thread_local variables cannot be in headers exposed by DLLs. However, it is +// important for performance reasons in general that +// `CurrentThreadIdentityIfPresent` be inlined. This is not possible across a +// DLL boundary so, with DLLs, we opt to have the function not be inlined. Note +// that `CurrentThreadIdentityIfPresent` is declared above so we can exclude +// this entire inline definition when compiling as a DLL. +#if !defined(ABSL_BUILD_DLL) && !defined(ABSL_CONSUME_DLL) inline ThreadIdentity* CurrentThreadIdentityIfPresent() { return thread_identity_ptr; } +#endif #elif ABSL_THREAD_IDENTITY_MODE != \ ABSL_THREAD_IDENTITY_MODE_USE_POSIX_SETSPECIFIC @@ -237,7 +253,7 @@ inline ThreadIdentity* CurrentThreadIdentityIfPresent() { #endif } // namespace base_internal -} // inline namespace lts_2019_08_08 +ABSL_NAMESPACE_END } // namespace absl #endif // ABSL_BASE_INTERNAL_THREAD_IDENTITY_H_ |