< prev index next >

src/hotspot/share/oops/instanceOop.hpp

Print this page

21  * questions.
22  *
23  */
24 
25 #ifndef SHARE_OOPS_INSTANCEOOP_HPP
26 #define SHARE_OOPS_INSTANCEOOP_HPP
27 
28 #include "oops/oop.hpp"
29 #include <type_traits>
30 
31 // An instanceOop is an instance of a Java Class
32 // Evaluating "new HashTable()" will create an instanceOop.
33 
34 class instanceOopDesc : public oopDesc {
35  public:
36   // aligned header size.
37   static int header_size() { return sizeof(instanceOopDesc)/HeapWordSize; }
38 
39   // If compressed, the offset of the fields of the instance may not be aligned.
40   static int base_offset_in_bytes() {
41     return (UseCompressedClassPointers) ?
42             klass_gap_offset_in_bytes() :
43             sizeof(instanceOopDesc);
44 
45   }
46 };
47 
48 // See similar requirement for oopDesc.
49 static_assert(std::is_trivially_default_constructible<instanceOopDesc>::value, "required");
50 
51 #endif // SHARE_OOPS_INSTANCEOOP_HPP

21  * questions.
22  *
23  */
24 
25 #ifndef SHARE_OOPS_INSTANCEOOP_HPP
26 #define SHARE_OOPS_INSTANCEOOP_HPP
27 
28 #include "oops/oop.hpp"
29 #include <type_traits>
30 
31 // An instanceOop is an instance of a Java Class
32 // Evaluating "new HashTable()" will create an instanceOop.
33 
34 class instanceOopDesc : public oopDesc {
35  public:
36   // aligned header size.
37   static int header_size() { return sizeof(instanceOopDesc)/HeapWordSize; }
38 
39   // If compressed, the offset of the fields of the instance may not be aligned.
40   static int base_offset_in_bytes() {
41     return sizeof(instanceOopDesc);



42   }
43 };
44 
45 // See similar requirement for oopDesc.
46 static_assert(std::is_trivially_default_constructible<instanceOopDesc>::value, "required");
47 
48 #endif // SHARE_OOPS_INSTANCEOOP_HPP
< prev index next >