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Diffstat (limited to 'src/third_party/boost-1.60.0/libs/container/src/global_resource.cpp')
-rw-r--r-- | src/third_party/boost-1.60.0/libs/container/src/global_resource.cpp | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/src/third_party/boost-1.60.0/libs/container/src/global_resource.cpp b/src/third_party/boost-1.60.0/libs/container/src/global_resource.cpp new file mode 100644 index 00000000000..23ca97887f3 --- /dev/null +++ b/src/third_party/boost-1.60.0/libs/container/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) + { return new char[bytes]; (void)bytes; (void)alignment; } + + virtual void do_deallocate(void* p, std::size_t bytes, std::size_t alignment) + { delete[]((char*)p); (void)bytes; (void)alignment; } + + 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 { |