* configure.in: check for nanosleep, -lrt if required.

  [ruby-core:02059]

* eval.c (thread_timer): use select(2) if nanosleep(2) is not
  available.

* eval.c: check __stub_getcontext for glibc on some platforms.
  [ruby-list:38984]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5286 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 10 insertions, 3 deletions

diff --git a/eval.c b/eval.c
index 9a6d342e43..839c0c0dd3 100644
--- a/eval.c
+++ b/eval.c
@@ -29,7 +29,7 @@
 #endif
 
 #include <stdio.h>
-#if defined(HAVE_UCONTEXT_H) && (defined(__ia64__) || defined(HAVE_NATIVETHREAD))
+#if defined(HAVE_UCONTEXT_H) && (defined(__ia64__) || defined(HAVE_NATIVETHREAD)) && !defined(__stub_getcontext)
 #include <ucontext.h>
 #define USE_CONTEXT
 #else
@@ -9552,12 +9552,19 @@ static void*
 thread_timer(dummy)
     void *dummy;
 {
-    struct timespec req, rem;
-
     for (;;) {
+#ifdef HAVE_NANOSLEEP
+	struct timespec req, rem;
+
 	req.tv_sec = 0;
 	req.tv_nsec = 10000000;
 	nanosleep(&req, &rem);
+#else
+	struct timeval tv;
+	tv.tv_sec = 0;
+	tv.tv_usec = 10000;
+	select(0, NULL, NULL, NULL, &tv);
+#endif
 	if (!rb_thread_critical) {
 	    rb_thread_pending = 1;
 	    if (rb_trap_immediate) {