usa	2018-08-27 22:59:09 +0900 (Mon, 27 Aug 2018)

  New Revision: 64560

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=64560

  Log:
    merge revision(s) 63994: [Backport #14920]
    
    reduce tzset
    
    * time.c (rb_localtime_r): call tzset() only after TZ environment
      variable is changed.

  Modified directories:
    branches/ruby_2_4/
  Modified files:
    branches/ruby_2_4/hash.c
    branches/ruby_2_4/time.c
    branches/ruby_2_4/version.h
Index: ruby_2_4/time.c
===================================================================
--- ruby_2_4/time.c	(revision 64559)
+++ ruby_2_4/time.c	(revision 64560)
@@ -643,12 +643,18 @@ static struct vtm *localtimew(wideval_t https://github.com/ruby/ruby/blob/trunk/ruby_2_4/time.c#L643
 static int leap_year_p(long y);
 #define leap_year_v_p(y) leap_year_p(NUM2LONG(mod((y), INT2FIX(400))))
 
+int ruby_tz_update;
+
 static struct tm *
 rb_localtime_r(const time_t *t, struct tm *result)
 {
 #if defined __APPLE__ && defined __LP64__
     if (*t != (time_t)(int)*t) return NULL;
 #endif
+    if (!ruby_tz_update) {
+	ruby_tz_update = 1;
+	tzset();
+    }
 #ifdef HAVE_GMTIME_R
     result = localtime_r(t, result);
 #else
@@ -674,7 +680,7 @@ rb_localtime_r(const time_t *t, struct t https://github.com/ruby/ruby/blob/trunk/ruby_2_4/time.c#L680
 #endif
     return result;
 }
-#define LOCALTIME(tm, result) (tzset(),rb_localtime_r((tm), &(result)))
+#define LOCALTIME(tm, result) rb_localtime_r((tm), &(result))
 
 #ifndef HAVE_STRUCT_TM_TM_GMTOFF
 static struct tm *
Index: ruby_2_4/version.h
===================================================================
--- ruby_2_4/version.h	(revision 64559)
+++ ruby_2_4/version.h	(revision 64560)
@@ -1,6 +1,6 @@ https://github.com/ruby/ruby/blob/trunk/ruby_2_4/version.h#L1
 #define RUBY_VERSION "2.4.5"
 #define RUBY_RELEASE_DATE "2018-08-27"
-#define RUBY_PATCHLEVEL 317
+#define RUBY_PATCHLEVEL 318
 
 #define RUBY_RELEASE_YEAR 2018
 #define RUBY_RELEASE_MONTH 8
Index: ruby_2_4/hash.c
===================================================================
--- ruby_2_4/hash.c	(revision 64559)
+++ ruby_2_4/hash.c	(revision 64560)
@@ -3136,6 +3136,9 @@ env_str_new2(const char *ptr) https://github.com/ruby/ruby/blob/trunk/ruby_2_4/hash.c#L3136
 
 static int env_path_tainted(const char *);
 
+static const char TZ_ENV[] = "TZ";
+extern int ruby_tz_update;
+
 static rb_encoding *
 env_encoding_for(const char *name, const char *ptr)
 {
@@ -3217,6 +3220,9 @@ env_delete(VALUE obj, VALUE name) https://github.com/ruby/ruby/blob/trunk/ruby_2_4/hash.c#L3220
 	    RB_GC_GUARD(name);
 	    path_tainted = 0;
 	}
+	else if (ENVMATCH(nam, TZ_ENV)) {
+	    ruby_tz_update = 0;
+	}
 	return value;
     }
     return Qnil;
@@ -3576,6 +3582,9 @@ env_aset(VALUE obj, VALUE nm, VALUE val) https://github.com/ruby/ruby/blob/trunk/ruby_2_4/hash.c#L3582
 	    path_tainted_p(value);
 	}
     }
+    else if (ENVMATCH(name, TZ_ENV)) {
+	ruby_tz_update = 0;
+    }
     return val;
 }
 
Index: ruby_2_4
===================================================================
--- ruby_2_4	(revision 64559)
+++ ruby_2_4	(revision 64560)

Property changes on: ruby_2_4
___________________________________________________________________
Modified: svn:mergeinfo
## -0,0 +0,1 ##
   Merged /trunk:r63994

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