gdb: add gdb::make_unique function

While GDB is still C++11, lets add a gdb::make_unique template
function that can be used to create std::unique_ptr objects, just like
the C++14 std::make_unique.

If GDB is being compiled with a C++14 compiler then the new
gdb::make_unique function will delegate to the std::make_unique.  I
checked with gcc, and at -O1 and above gdb::make_unique will be
optimised away completely in this case.

If C++14 (or later) becomes our minimum, then it will be easy enough
to go through the code and replace gdb::make_unique with
std::make_unique later on.

I've make use of this function in all the places I think this can
easily be used, though I'm sure I've probably missed some.

Should be no user visible changes after this commit.

Approved-By: Tom Tromey <tom@tromey.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/gdb/unittests/parallel-for-selftests.c b/gdb/unittests/parallel-for-selftests.c
index 15a095a..1ad7eaa 100644
--- a/gdb/unittests/parallel-for-selftests.c
+++ b/gdb/unittests/parallel-for-selftests.c
@@ -160,7 +160,7 @@ TEST (int n_threads)
 	      {
 		if (start == end)
 		  any_empty_tasks = true;
-		return std::unique_ptr<int> (new int (end - start));
+		return gdb::make_unique<int> (end - start);
 	      });
   SELF_CHECK (!any_empty_tasks);
   SELF_CHECK (std::all_of (intresults.begin (),
@@ -178,7 +178,7 @@ TEST (int n_threads)
 	      {
 		if (start == end)
 		  any_empty_tasks = true;
-		return std::unique_ptr<int> (new int (end - start));
+		return gdb::make_unique<int> (end - start);
 	      },
 	    task_size_one);
   SELF_CHECK (!any_empty_tasks);