further use of _Noreturn, for non-plain-C functions
note that POSIX does not specify these functions as _Noreturn, because
POSIX is aligned with C99, not the new C11 standard. when POSIX is
eventually updated to C11, it will almost surely give these functions
the _Noreturn attribute. for now, the actual _Noreturn keyword is not
used anyway when compiling with a c99 compiler, which is what POSIX
requires; the GCC __attribute__ is used instead if it's available,
however.
in a few places, I've added infinite for loops at the end of _Noreturn
functions to silence compiler warnings. presumably
__buildin_unreachable could achieve the same thing, but it would only
work on newer GCCs and would not be portable. the loops should have
near-zero code size cost anyway.
like the previous _Noreturn commit, this one is based on patches
contributed by philomath.
diff --git a/include/pthread.h b/include/pthread.h
index 417156c..bc0d9f1 100644
--- a/include/pthread.h
+++ b/include/pthread.h
@@ -10,6 +10,13 @@
#define __restrict
#endif
+#if __STDC_VERSION__ >= 201112L
+#elif defined(__GNUC__)
+#define _Noreturn __attribute__((__noreturn__))
+#else
+#define _Noreturn
+#endif
+
#define __NEED_time_t
#define __NEED_clockid_t
#define __NEED_struct_timespec
@@ -79,7 +86,7 @@
int pthread_create(pthread_t *__restrict, const pthread_attr_t *__restrict, void *(*)(void *), void *__restrict);
int pthread_detach(pthread_t);
-void pthread_exit(void *);
+_Noreturn void pthread_exit(void *);
int pthread_join(pthread_t, void **);
#ifdef __GNUC__