* error.c (rb_syserr_new): new function to make SystemCallError

instance without errno.  [EXPERIMENTAL]
* error.c (rb_syserr_fail, rb_mod_syserr_fail): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@29728 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,10 @@
+Tue Nov  9 07:30:15 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* error.c (rb_syserr_new): new function to make SystemCallError
+	  instance without errno.  [EXPERIMENTAL]
+
+	* error.c (rb_syserr_fail, rb_mod_syserr_fail): ditto.
+
 Tue Nov  9 05:54:57 2010  Marc-Andre Lafortune  <ruby-core@marc-andre.ca>
 
 	* lib/*.rb: Remove unused variable warnings.

error.c

@@ -1532,17 +1532,28 @@ static VALUE
 make_errno_exc(const char *mesg)
 {
     int n = errno;
-    VALUE arg;
 
     errno = 0;
     if (n == 0) {
 	rb_bug("rb_sys_fail(%s) - errno == 0", mesg ? mesg : "");
     }
+    return rb_syserr_new(n, mesg);
+}
 
+VALUE
+rb_syserr_new(int n, const char *mesg)
+{
+    VALUE arg;
     arg = mesg ? rb_str_new2(mesg) : Qnil;
     return rb_class_new_instance(1, &arg, get_syserr(n));
 }
 
+void
+rb_syserr_fail(int e, const char *mesg)
+{
+    rb_exc_raise(rb_syserr_new(e, mesg));
+}
+
 void
 rb_sys_fail(const char *mesg)
 {
@@ -1557,6 +1568,14 @@ rb_mod_sys_fail(VALUE mod, const char *mesg)
     rb_exc_raise(exc);
 }
 
+void
+rb_mod_syserr_fail(VALUE mod, int e, const char *mesg)
+{
+    VALUE exc = rb_syserr_new(e, mesg);
+    rb_extend_object(exc, mod);
+    rb_exc_raise(exc);
+}
+
 void
 rb_sys_warning(const char *fmt, ...)
 {

include/ruby/ruby.h

@@ -1152,6 +1152,9 @@ NORETURN(void rb_mod_sys_fail(VALUE, const char*));
 NORETURN(void rb_iter_break(void));
 NORETURN(void rb_exit(int));
 NORETURN(void rb_notimplement(void));
+VALUE rb_syserr_new(int, const char *);
+NORETURN(void rb_syserr_fail(int, const char*));
+NORETURN(void rb_mod_syserr_fail(VALUE, int, const char*));
 
 /* reports if `-W' specified */
 PRINTF_ARGS(void rb_warning(const char*, ...), 1, 2);