12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_OOPS_ARRAY_HPP
26 #define SHARE_OOPS_ARRAY_HPP
27
28 #include "memory/allocation.hpp"
29 #include "memory/metaspace.hpp"
30 #include "runtime/atomic.hpp"
31 #include "utilities/align.hpp"
32
33 // Array for metadata allocation
34
35 template <typename T>
36 class Array: public MetaspaceObj {
37 friend class MetadataFactory;
38 friend class MetaspaceShared;
39 friend class VMStructs;
40 friend class JVMCIVMStructs;
41 friend class MethodHandleCompiler; // special case
42 friend class WhiteBox;
43 protected:
44 int _length; // the number of array elements
45 T _data[1]; // the array memory
46
47 void initialize(int length) {
48 _length = length;
49 }
50
51 private:
52 // Turn off copy constructor and assignment operator.
53 Array(const Array<T>&);
54 void operator=(const Array<T>&);
55
56 void* operator new(size_t size, ClassLoaderData* loader_data, int length, TRAPS) throw() {
57 size_t word_size = Array::size(length);
58 return (void*) Metaspace::allocate(loader_data, word_size,
59 MetaspaceObj::array_type(sizeof(T)), THREAD);
60 }
61
62 static size_t byte_sizeof(int length, size_t elm_byte_size) {
63 return sizeof(Array<T>) + MAX2(length - 1, 0) * elm_byte_size;
64 }
65 static size_t byte_sizeof(int length) { return byte_sizeof(length, sizeof(T)); }
66
67 // WhiteBox API helper.
68 // Can't distinguish between array of length 0 and length 1,
69 // will always return 0 in those cases.
70 static int bytes_to_length(size_t bytes) {
71 assert(is_aligned(bytes, BytesPerWord), "Must be, for now");
72
73 if (sizeof(Array<T>) >= bytes) {
74 return 0;
|
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_OOPS_ARRAY_HPP
26 #define SHARE_OOPS_ARRAY_HPP
27
28 #include "memory/allocation.hpp"
29 #include "memory/metaspace.hpp"
30 #include "runtime/atomic.hpp"
31 #include "utilities/align.hpp"
32 #include "utilities/macros.hpp"
33
34 // Array for metadata allocation
35
36 template <typename T>
37 class Array: public MetaspaceObj {
38 friend class MetadataFactory;
39 friend class MetaspaceShared;
40 friend class VMStructs;
41 friend class JVMCIVMStructs;
42 friend class MethodHandleCompiler; // special case
43 friend class WhiteBox;
44 protected:
45 int _length; // the number of array elements
46 T _data[1]; // the array memory
47
48 void initialize(int length) {
49 _length = length;
50 }
51
52 private:
53 NONCOPYABLE(Array);
54
55 void* operator new(size_t size, ClassLoaderData* loader_data, int length, TRAPS) throw() {
56 size_t word_size = Array::size(length);
57 return (void*) Metaspace::allocate(loader_data, word_size,
58 MetaspaceObj::array_type(sizeof(T)), THREAD);
59 }
60
61 static size_t byte_sizeof(int length, size_t elm_byte_size) {
62 return sizeof(Array<T>) + MAX2(length - 1, 0) * elm_byte_size;
63 }
64 static size_t byte_sizeof(int length) { return byte_sizeof(length, sizeof(T)); }
65
66 // WhiteBox API helper.
67 // Can't distinguish between array of length 0 and length 1,
68 // will always return 0 in those cases.
69 static int bytes_to_length(size_t bytes) {
70 assert(is_aligned(bytes, BytesPerWord), "Must be, for now");
71
72 if (sizeof(Array<T>) >= bytes) {
73 return 0;
|