Add std::unique support

Simple copy of current auto_ptr support (just suppport for
functions returning std::unique_ptr).

Closes #1722

Examples/test-suite/common.mk

@@ -612,6 +612,7 @@ CPP11_TEST_CASES += \
 	cpp11_sizeof_object \
 	cpp11_static_assert \
 	cpp11_std_array \
+	cpp11_std_unique_ptr \
 	cpp11_strongly_typed_enumerations \
 	cpp11_thread_local \
 	cpp11_template_double_brackets \

Examples/test-suite/cpp11_std_unique_ptr.i

@@ -0,0 +1,53 @@
+%module cpp11_std_unique_ptr
+
+#if defined(SWIGCSHARP) || defined(SWIGJAVA) || defined(SWIGPYTHON) || defined(SWIGRUBY)
+
+%include "std_unique_ptr.i"
+
+%unique_ptr(Klass)
+
+%inline %{
+#include <memory>
+#include <string>
+#include "swig_examples_lock.h"
+
+class Klass {
+public:
+  explicit Klass(const char* label) :
+    m_label(label)
+  {
+    SwigExamples::Lock lock(critical_section);
+    total_count++;
+  }
+
+  const char* getLabel() const { return m_label.c_str(); }
+
+  ~Klass()
+  {
+    SwigExamples::Lock lock(critical_section);
+    total_count--;
+  }
+
+  static int getTotal_count() { return total_count; }
+
+private:
+  static SwigExamples::CriticalSection critical_section;
+  static int total_count;
+
+  std::string m_label;
+};
+
+SwigExamples::CriticalSection Klass::critical_section;
+int Klass::total_count = 0;
+
+%}
+
+%inline %{
+
+std::unique_ptr<Klass> makeKlassUniquePtr(const char* label) {
+  return std::unique_ptr<Klass>(new Klass(label));
+}
+
+%}
+
+#endif

Examples/test-suite/csharp/cpp11_std_unique_ptr_runme.cs

@@ -0,0 +1,64 @@
+using System;
+using cpp11_std_unique_ptrNamespace;
+
+public class cpp11_std_unique_ptr_runme {
+    private static void WaitForGC()
+    {
+        System.GC.Collect(); 
+        System.GC.WaitForPendingFinalizers();
+        System.Threading.Thread.Sleep(10);
+    }
+
+    public static void Main()
+    {
+        Klass k1 = cpp11_std_unique_ptr.makeKlassUniquePtr("first");
+        if (k1.getLabel() != "first")
+            throw new Exception("wrong object label");
+
+        Klass k2 = cpp11_std_unique_ptr.makeKlassUniquePtr("second");
+        if (Klass.getTotal_count() != 2)
+            throw new Exception("number of objects should be 2");
+
+        using (Klass k3 = cpp11_std_unique_ptr.makeKlassUniquePtr("second")) {
+          if (Klass.getTotal_count() != 3)
+            throw new Exception("number of objects should be 3");
+        }
+        if (Klass.getTotal_count() != 2)
+            throw new Exception("number of objects should be 2");
+
+        k1 = null;
+        {
+          int countdown = 500;
+          int expectedCount = 1;
+          while (true) {
+            WaitForGC();
+            if (--countdown == 0)
+              break;
+            if (Klass.getTotal_count() == expectedCount)
+              break;
+          };
+          int actualCount = Klass.getTotal_count();
+          if (actualCount != expectedCount)
+            Console.Error.WriteLine("Expected count: " + expectedCount + " Actual count: " + actualCount); // Finalizers are not guaranteed to be run and sometimes they just don't
+        }
+
+        if (k2.getLabel() != "second")
+            throw new Exception("wrong object label");
+
+        k2 = null;
+        {
+          int countdown = 500;
+          int expectedCount = 0;
+          while (true) {
+            WaitForGC();
+            if (--countdown == 0)
+              break;
+            if (Klass.getTotal_count() == expectedCount)
+              break;
+          }
+          int actualCount = Klass.getTotal_count();
+          if (actualCount != expectedCount)
+            Console.Error.WriteLine("Expected count: " + expectedCount + " Actual count: " + actualCount); // Finalizers are not guaranteed to be run and sometimes they just don't
+        }
+    }
+}

Examples/test-suite/java/cpp11_std_unique_ptr_runme.java

@@ -0,0 +1,68 @@
+import cpp11_std_unique_ptr.*;
+
+public class cpp11_std_unique_ptr_runme {
+  static {
+    try {
+        System.loadLibrary("cpp11_std_unique_ptr");
+    } catch (UnsatisfiedLinkError e) {
+      System.err.println("Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" + e);
+      System.exit(1);
+    }
+  }
+
+  private static void WaitForGC()
+  {
+    System.gc();
+    System.runFinalization();
+    try {
+      java.lang.Thread.sleep(10);
+    } catch (java.lang.InterruptedException e) {
+    }
+  }
+
+  public static void main(String argv[]) throws Throwable
+  {
+    Klass k1 = cpp11_std_unique_ptr.makeKlassUniquePtr("first");
+    if (!k1.getLabel().equals("first"))
+      throw new RuntimeException("wrong object label");
+
+    Klass k2 = cpp11_std_unique_ptr.makeKlassUniquePtr("second");
+    if (Klass.getTotal_count() != 2)
+      throw new RuntimeException("number of objects should be 2");
+
+    k1 = null;
+    {
+      int countdown = 500;
+      int expectedCount = 1;
+      while (true) {
+        WaitForGC();
+        if (--countdown == 0)
+          break;
+        if (Klass.getTotal_count() == expectedCount)
+          break;
+      }
+      int actualCount = Klass.getTotal_count();
+      if (actualCount != expectedCount)
+        System.err.println("GC failed to run (cpp11_std_unique_ptr 1). Expected count: " + expectedCount + " Actual count: " + actualCount); // Finalizers are not guaranteed to be run and sometimes they just don't
+    }
+
+    if (!k2.getLabel().equals("second"))
+      throw new RuntimeException("wrong object label");
+
+    k2 = null;
+    {
+      int countdown = 500;
+      int expectedCount = 0;
+      while (true) {
+        WaitForGC();
+        if (--countdown == 0)
+          break;
+        if (Klass.getTotal_count() == expectedCount)
+          break;
+      };
+      int actualCount = Klass.getTotal_count();
+      if (actualCount != expectedCount)
+        System.err.println("GC failed to run (cpp11_std_unique_ptr 2). Expected count: " + expectedCount + " Actual count: " + actualCount); // Finalizers are not guaranteed to be run and sometimes they just don't
+    }
+  }
+}

Examples/test-suite/python/cpp11_std_unique_ptr_runme.py

@@ -0,0 +1,17 @@
+from cpp11_std_unique_ptr import *
+
+k1 = makeKlassUniquePtr("first")
+k2 = makeKlassUniquePtr("second")
+if Klass.getTotal_count() != 2:
+    raise "number of objects should be 2"
+
+del k1
+if Klass.getTotal_count() != 1:
+    raise "number of objects should be 1"
+
+if k2.getLabel() != "second":
+    raise "wrong object label"
+
+del k2
+if Klass.getTotal_count() != 0:
+    raise "no objects should be left"

Examples/test-suite/ruby/cpp11_std_unique_ptr_runme.rb

@@ -0,0 +1,27 @@
+#!/usr/bin/env ruby
+
+require 'swig_assert'
+
+require 'cpp11_std_unique_ptr'
+
+def gc_check(expected_count)
+#  GC.start(full_mark: true, immediate_sweep: true)
+  GC.start
+# GC is not reliably run, skip check
+#  swig_assert_equal_simple(expected_count, Cpp11_std_unique_ptr::Klass::getTotal_count())
+end
+
+k1 = Cpp11_std_unique_ptr::makeKlassUniquePtr("first")
+k2 = Cpp11_std_unique_ptr::makeKlassUniquePtr("second")
+swig_assert_equal_simple(2, Cpp11_std_unique_ptr::Klass::getTotal_count())
+
+gc_check(2)
+k1 = nil
+gc_check(1)
+
+swig_assert_equal_simple(k2.getLabel(), "second")
+gc_check(1)
+
+k2 = nil
+gc_check(0)
+