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[libstdc++] New testcase for additional allocators



We have a number of different allocators and allocator adaptors.
There hasn't been much testing in this area.

Tested on i686-linux native and powerpc-eabisim cross; passes on both
platforms.



2001-12-11  Phil Edwards  <pme@gcc.gnu.org>

	* testsuite/ext/allocators.cc:  New file.


Index: testsuite/ext/allocators.cc
===================================================================
RCS file: allocators.cc
diff -N allocators.cc
--- /dev/null	Tue May  5 13:32:27 1998
+++ allocators.cc	Tue Dec 11 11:04:20 2001
@@ -0,0 +1,103 @@
+// 2001-11-25  Phil Edwards  <pme@gcc.gnu.org>
+//
+// Copyright (C) 2001 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 2, or (at your option)
+// any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING.  If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// 20.4.1.1 allocator members
+
+#undef __USE_MALLOC
+#include <memory>
+#include <cstdlib>
+#include <testsuite_hooks.h>
+
+typedef std::__malloc_alloc_template<3>             weird_alloc;
+template class std::__malloc_alloc_template<3>;
+
+typedef std::__debug_alloc<weird_alloc>             debug_weird_alloc;
+template class std::__debug_alloc<weird_alloc>;
+
+typedef std::__default_alloc_template<true, 3>      unshared_normal_alloc;
+template class std::__default_alloc_template<true, 3>;
+
+typedef std::__default_alloc_template<false, 3>     unshared_singlethreaded;
+template class std::__default_alloc_template<false, 3>;
+
+//std::malloc_alloc test_malloc_alloc;
+
+struct big
+{
+    long f[15];
+};
+
+
+bool         new_called;
+bool         delete_called;
+std::size_t  requested;
+
+void* 
+operator new(std::size_t n) throw(std::bad_alloc)
+{
+  new_called = true;
+  requested = n;
+  return std::malloc(n);
+}
+
+void
+operator delete(void *v) throw()
+{
+  delete_called = true;
+  return std::free(v);
+}
+
+
+template <typename arbitrary_SGIstyle_allocator,
+          bool uses_global_new_and_delete>
+void test()
+{
+  new_called = false;
+  delete_called = false;
+  requested = 0;
+
+  std::__allocator<big, arbitrary_SGIstyle_allocator>   a;
+  big *p = a.allocate(10);
+  if (uses_global_new_and_delete)  VERIFY (requested >= (10*15*sizeof(long)));
+  // Touch the far end of supposedly-allocated memory to check that we got
+  // all of it.  Why "3"?  Because it's my favorite integer between e and pi.
+  p[9].f[14] = 3;
+  VERIFY (new_called == uses_global_new_and_delete );
+  a.deallocate(p,10);
+  VERIFY (delete_called == uses_global_new_and_delete );
+}
+
+
+// These just help tracking down error messages.
+void test01() { test<weird_alloc,false>(); }
+void test02() { test<debug_weird_alloc,false>(); }
+void test03() { test<unshared_normal_alloc,true>(); }
+void test04() { test<unshared_singlethreaded,true>(); }
+
+int main()
+{
+  test01();
+  test02();
+  test03();
+  test04();
+
+  return 0;
+}
+


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