diff options
Diffstat (limited to 'absl/base/internal/thread_identity.h')
| -rw-r--r-- | absl/base/internal/thread_identity.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/absl/base/internal/thread_identity.h b/absl/base/internal/thread_identity.h index 5dfd0715dc..ceb109b41c 100644 --- a/absl/base/internal/thread_identity.h +++ b/absl/base/internal/thread_identity.h @@ -30,6 +30,7 @@ #include <atomic> #include <cstdint> +#include "absl/base/config.h" #include "absl/base/internal/per_thread_tls.h" namespace absl { @@ -234,9 +235,17 @@ ABSL_CONST_INIT extern thread_local ThreadIdentity* thread_identity_ptr; #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 |