diff options
Diffstat (limited to 'thread.h')
| -rw-r--r-- | thread.h | 12 |
1 files changed, 10 insertions, 2 deletions
@@ -372,8 +372,16 @@ # define PTHREAD_GETSPECIFIC(key) pthread_getspecific(key) #endif -#if defined(PERL_THREAD_LOCAL) && !defined(PERL_GET_CONTEXT) && !defined(PERL_SET_CONTEXT) -/* Use C11 thread-local storage, where possible: */ +#if defined(PERL_THREAD_LOCAL) && !defined(PERL_GET_CONTEXT) && !defined(PERL_SET_CONTEXT) && !defined(__cplusplus) +/* Use C11 thread-local storage, where possible. + * Frustratingly we can't use it for C++ extensions, C++ and C disagree on the + * syntax used for thread local storage, meaning that the working token that + * Configure probed for C turns out to be a compiler error on C++. Great. + * (Well, unless one or both is supporting non-standard syntax as an extension) + * As Configure doesn't have a way to probe for C++ dialects, we just take the + * safe option and do the same as 5.34.0 and earlier - use pthreads on C++. + * Of course, if C++ XS extensions really want to avoid *all* this overhead, + * they should #define PERL_NO_GET_CONTEXT and pass aTHX/aTHX_ explicitly) */ # define PERL_USE_THREAD_LOCAL extern PERL_THREAD_LOCAL void *PL_current_context; |