* 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

ChangeLog

@@ -1,7 +1,18 @@
-Thu Dec 25 00:17:53 2003  Yukihiro Matsumoto  <matz@ruby-lang.org>
+Thu Dec 25 04:00:44 2003  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* stable version 1.8.1 released.
 
+Thu Dec 25 00:17:53 2003  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* 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]
+
 Wed Dec 24 23:48:04 2003  NAKAMURA, Hiroshi  <nahi@ruby-lang.org>
 
 	* test/soap/test_basetype.rb, test/soap/marshal/test_marshal.rb

configure.in

@@ -721,6 +721,10 @@ if test "$enable_pthread" = "yes"; then
          fi
       fi
    fi
+   AC_CHECK_FUNC(nanosleep)
+   if test "$ac_cv_func_nanosleep" = "no"; then
+       AC_CHECK_LIB(rt, nanosleep, AC_DEFINE(HAVE_NANOSLEEP))
+   fi
 fi
 
 dnl default value for $KANJI

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) {