update ceph source to reef 18.1.2

[ceph.git] / ceph / src / boost / libs / python / src / object / class.cpp

diff --git a/ceph/src/boost/libs/python/src/object/class.cpp b/ceph/src/boost/libs/python/src/object/class.cpp
index 9bb9683a312d7a20ebbf226cf2154759531d69cc..8778b7abcd0341230230d51782340e310bff7cdb 100644 (file)
--- a/ceph/src/boost/libs/python/src/object/class.cpp
+++ b/ceph/src/boost/libs/python/src/object/class.cpp
@@ -5,6 +5,7 @@
 
 #include <boost/python/detail/prefix.hpp>
 #include <boost/mpl/lambda.hpp> // #including this first is an intel6 workaround
+#include <boost/cstdint.hpp>
 
 #include <boost/python/object/class.hpp>
 #include <boost/python/object/instance.hpp>
@@ -208,7 +209,7 @@ namespace objects
   {
       if (static_data_object.tp_dict == 0)
       {
-          Py_TYPE(&static_data_object) = &PyType_Type;
+          Py_SET_TYPE(&static_data_object, &PyType_Type);
           static_data_object.tp_base = &PyProperty_Type;
           if (PyType_Ready(&static_data_object))
               return 0;
@@ -316,7 +317,7 @@ namespace objects
   {
       if (class_metatype_object.tp_dict == 0)
       {
-          Py_TYPE(&class_metatype_object) = &PyType_Type;
+          Py_SET_TYPE(&class_metatype_object, &PyType_Type);
           class_metatype_object.tp_base = &PyType_Type;
           if (PyType_Ready(&class_metatype_object))
               return type_handle();
@@ -374,12 +375,7 @@ namespace objects
               // like, so we'll store the total size of the object
               // there. A negative number indicates that the extra
               // instance memory is not yet allocated to any holders.
-#if PY_VERSION_HEX >= 0x02060000
-              Py_SIZE(result) =
-#else
-              result->ob_size =
-#endif
-                  -(static_cast<int>(offsetof(instance<>,storage) + instance_size));
+              Py_SET_SIZE(result,-static_cast<int>(offsetof(instance<>,storage) + instance_size));
           }
           return (PyObject*)result;
       }
@@ -470,7 +466,7 @@ namespace objects
   {
       if (class_type_object.tp_dict == 0)
       {
-          Py_TYPE(&class_type_object) = incref(class_metatype().get());
+          Py_SET_TYPE(&class_type_object, incref(class_metatype().get()));
           class_type_object.tp_base = &PyBaseObject_Type;
           if (PyType_Ready(&class_type_object))
               return type_handle();
@@ -726,28 +722,47 @@ namespace objects
 } // namespace objects
 
 
-void* instance_holder::allocate(PyObject* self_, std::size_t holder_offset, std::size_t holder_size)
+typedef unsigned int alignment_marker_t;
+
+void* instance_holder::allocate(PyObject* self_, std::size_t holder_offset, std::size_t holder_size, std::size_t alignment)
 {
     assert(PyType_IsSubtype(Py_TYPE(Py_TYPE(self_)), &class_metatype_object));
     objects::instance<>* self = (objects::instance<>*)self_;
     
-    int total_size_needed = holder_offset + holder_size;
+    int total_size_needed = holder_offset + holder_size + alignment - 1;
     
     if (-Py_SIZE(self) >= total_size_needed)
     {
         // holder_offset should at least point into the variable-sized part
         assert(holder_offset >= offsetof(objects::instance<>,storage));
 
+        size_t allocated = holder_size + alignment;
+        void* storage = (char*)self + holder_offset;
+        void* aligned_storage = ::boost::alignment::align(alignment, holder_size, storage, allocated);
+
         // Record the fact that the storage is occupied, noting where it starts
-        Py_SIZE(self) = holder_offset;
-        return (char*)self + holder_offset;
+        const size_t offset = reinterpret_cast<uintptr_t>(aligned_storage) - reinterpret_cast<uintptr_t>(storage) + holder_offset;
+        Py_SET_SIZE(self, offset);
+        return (char*)self + offset;
     }
     else
     {
-        void* const result = PyMem_Malloc(holder_size);
-        if (result == 0)
+        const size_t base_allocation = sizeof(alignment_marker_t) + holder_size + alignment - 1;
+        void* const base_storage = PyMem_Malloc(base_allocation);
+        if (base_storage == 0)
             throw std::bad_alloc();
-        return result;
+
+        const uintptr_t x = reinterpret_cast<uintptr_t>(base_storage) + sizeof(alignment_marker_t);
+        //this has problems for x -> max(void *)
+        //const size_t padding = alignment - ((x + sizeof(alignment_marker_t)) % alignment);
+        //only works for alignments with alignments of powers of 2, but no edge conditions
+        const uintptr_t padding = alignment == 1 ? 0 : ( alignment - (x & (alignment - 1)) );
+        const size_t aligned_offset = sizeof(alignment_marker_t) + padding;
+        void* const aligned_storage = (char *)base_storage + aligned_offset;
+        BOOST_ASSERT((char *) aligned_storage + holder_size <= (char *)base_storage + base_allocation);
+        alignment_marker_t* const marker_storage = reinterpret_cast<alignment_marker_t *>((char *)aligned_storage - sizeof(alignment_marker_t));
+        *marker_storage = static_cast<alignment_marker_t>(padding);
+        return aligned_storage;
     }
 }
 
@@ -757,7 +772,9 @@ void instance_holder::deallocate(PyObject* self_, void* storage) throw()
     objects::instance<>* self = (objects::instance<>*)self_;
     if (storage != (char*)self + Py_SIZE(self))
     {
-        PyMem_Free(storage);
+        alignment_marker_t* marker_storage = reinterpret_cast<alignment_marker_t *>((char *)storage - sizeof(alignment_marker_t));
+        void *malloced_storage = (char *) storage - sizeof(alignment_marker_t) - (*marker_storage);
+        PyMem_Free(malloced_storage);
     }
 }