mame	2018-02-15 10:59:16 +0900 (Thu, 15 Feb 2018)

  New Revision: 62409

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=62409

  Log:
    thread_pthread.c: Use `getpagesize()` when `pthread_attr_getguardsize` is unavailable
    
    This is also for emscripten.

  Modified files:
    trunk/configure.ac
    trunk/thread_pthread.c
Index: configure.ac
===================================================================
--- configure.ac	(revision 62408)
+++ configure.ac	(revision 62409)
@@ -2290,7 +2290,7 @@ AS_IF([test x"$enable_pthread" = xyes], https://github.com/ruby/ruby/blob/trunk/configure.ac#L2290
 	AC_DEFINE(NON_SCALAR_THREAD_ID)
     ])
     AC_CHECK_FUNCS(sched_yield pthread_attr_setinheritsched \
-	pthread_attr_get_np pthread_attr_getstack \
+	pthread_attr_get_np pthread_attr_getstack pthread_attr_getguardsize \
 	pthread_get_stackaddr_np pthread_get_stacksize_np \
 	thr_stksegment pthread_stackseg_np pthread_getthrds_np \
 	pthread_condattr_setclock \
Index: thread_pthread.c
===================================================================
--- thread_pthread.c	(revision 62408)
+++ thread_pthread.c	(revision 62409)
@@ -561,8 +561,12 @@ get_stack(void **addr, size_t *size) https://github.com/ruby/ruby/blob/trunk/thread_pthread.c#L561
     CHECK_ERR(pthread_attr_getstackaddr(&attr, addr));
     CHECK_ERR(pthread_attr_getstacksize(&attr, size));
 # endif
+# ifdef HAVE_PTHREAD_ATTR_GETGUARDSIZE
     CHECK_ERR(pthread_attr_getguardsize(&attr, &guard));
     *size -= guard;
+# else
+    *size -= getpagesize();
+# endif
     pthread_attr_destroy(&attr);
 #elif defined HAVE_PTHREAD_ATTR_GET_NP /* FreeBSD, DragonFly BSD, NetBSD */
     pthread_attr_t attr;

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