Squashed 'third_party/boostorg/container/' content from commit 1ad6431
Change-Id: I7d095db3455264c03446268e5675b926bebedb0a
git-subtree-dir: third_party/boostorg/container
git-subtree-split: 1ad64316a432a7f021b4956acf88abc6aaa8a77e
diff --git a/src/global_resource.cpp b/src/global_resource.cpp
new file mode 100644
index 0000000..15f4fe4
--- /dev/null
+++ b/src/global_resource.cpp
@@ -0,0 +1,106 @@
+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2015-2015. Distributed under the Boost
+// Software License, Version 1.0. (See accompanying file
+// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+// See http://www.boost.org/libs/container for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#define BOOST_CONTAINER_SOURCE
+#include <boost/container/pmr/memory_resource.hpp>
+
+#include <boost/core/no_exceptions_support.hpp>
+#include <boost/container/throw_exception.hpp>
+#include <boost/container/detail/dlmalloc.hpp> //For global lock
+
+#include <cstddef>
+#include <new>
+
+namespace boost {
+namespace container {
+namespace pmr {
+
+class new_delete_resource_imp
+ : public memory_resource
+{
+ public:
+
+ virtual ~new_delete_resource_imp()
+ {}
+
+ virtual void* do_allocate(std::size_t bytes, std::size_t alignment)
+ { (void)bytes; (void)alignment; return new char[bytes]; }
+
+ virtual void do_deallocate(void* p, std::size_t bytes, std::size_t alignment)
+ { (void)bytes; (void)alignment; delete[]((char*)p); }
+
+ virtual bool do_is_equal(const memory_resource& other) const BOOST_NOEXCEPT
+ { return &other == this; }
+} new_delete_resource_instance;
+
+struct null_memory_resource_imp
+ : public memory_resource
+{
+ public:
+
+ virtual ~null_memory_resource_imp()
+ {}
+
+ virtual void* do_allocate(std::size_t bytes, std::size_t alignment)
+ {
+ (void)bytes; (void)alignment;
+ throw_bad_alloc();
+ return 0;
+ }
+
+ virtual void do_deallocate(void* p, std::size_t bytes, std::size_t alignment)
+ { (void)p; (void)bytes; (void)alignment; }
+
+ virtual bool do_is_equal(const memory_resource& other) const BOOST_NOEXCEPT
+ { return &other == this; }
+} null_memory_resource_instance;
+
+BOOST_CONTAINER_DECL memory_resource* new_delete_resource() BOOST_NOEXCEPT
+{
+ return &new_delete_resource_instance;
+}
+
+BOOST_CONTAINER_DECL memory_resource* null_memory_resource() BOOST_NOEXCEPT
+{
+ return &null_memory_resource_instance;
+}
+
+static memory_resource *default_memory_resource = &new_delete_resource_instance;
+
+BOOST_CONTAINER_DECL memory_resource* set_default_resource(memory_resource* r) BOOST_NOEXCEPT
+{
+ //TO-DO: synchronizes-with part using atomics
+ if(dlmalloc_global_sync_lock()){
+ memory_resource *previous = default_memory_resource;
+ default_memory_resource = r ? r : new_delete_resource();
+ dlmalloc_global_sync_unlock();
+ return previous;
+ }
+ else{
+ return new_delete_resource();
+ }
+}
+
+BOOST_CONTAINER_DECL memory_resource* get_default_resource() BOOST_NOEXCEPT
+{
+ //TO-DO: synchronizes-with part using atomics
+ if(dlmalloc_global_sync_lock()){
+ memory_resource *current = default_memory_resource;
+ dlmalloc_global_sync_unlock();
+ return current;
+ }
+ else{
+ return new_delete_resource();
+ }
+}
+
+} //namespace pmr {
+} //namespace container {
+} //namespace boost {