[memory_view] Make MemoryView API Ractor-safe (#3911)

* memory_view.c: make Ractor-safe

* test/ruby/test_memory_view.rb: Add test_ractor

* memory_view: fix typo

* memory_view.c: Use st_update in unregster_exported_object

* memory_view: update dependency

1 files changed, 18 insertions, 0 deletions

diff --git a/test/ruby/test_memory_view.rb b/test/ruby/test_memory_view.rb
index 9a6c834bb8..ed2f53c1e3 100644
--- a/test/ruby/test_memory_view.rb
+++ b/test/ruby/test_memory_view.rb
@@ -320,4 +320,22 @@ class TestMemoryView < Test::Unit::TestCase
     assert_equal([-1, -2], mv[[1, 0]])
     assert_equal([-7, -8], mv[[1, 3]])
   end
+
+  def test_ractor
+    assert_in_out_err([], <<-"end;", ["[5, 6]", "[-7, -8]"], [])
+      require "-test-/memory_view"
+      require "rbconfig/sizeof"
+      $VERBOSE = nil
+      r = Ractor.new RbConfig::SIZEOF["short"] do |sizeof_short|
+        buf = [ 1, 2,  3,  4,  5,  6,  7,  8,
+                -1, -2, -3, -4, -5, -6, -7, -8].pack("s*")
+        shape = [2, 4]
+        strides = [4*sizeof_short*2, sizeof_short*2]
+        mv = MemoryViewTestUtils::MultiDimensionalView.new(buf, "ss", shape, strides)
+        p mv[[0, 2]]
+        mv[[1, 3]]
+      end
+      p r.take
+    end;
+  end
 end