Mercurial > jdk8-mips64-public > hotspot / file comparison
comparison: src/share/vm/utilities/array.hpp
src/share/vm/utilities/array.hpp
- changeset 6992
- 2c6ef90f030a
- parent 6911
- ce8f6bb717c9
- child 6993
- 870c03421152
equal
deleted
inserted
replaced
| 6991:882004b9e7e1 | 6992:2c6ef90f030a |
|---|---|
| 303 template <typename T> | 303 template <typename T> |
| 304 class Array: public MetaspaceObj { | 304 class Array: public MetaspaceObj { |
| 305 friend class MetadataFactory; | 305 friend class MetadataFactory; |
| 306 friend class VMStructs; | 306 friend class VMStructs; |
| 307 friend class MethodHandleCompiler; // special case | 307 friend class MethodHandleCompiler; // special case |
| 308 friend class WhiteBox; | |
| 308 protected: | 309 protected: |
| 309 int _length; // the number of array elements | 310 int _length; // the number of array elements |
| 310 T _data[1]; // the array memory | 311 T _data[1]; // the array memory |
| 311 | 312 |
| 312 void initialize(int length) { | 313 void initialize(int length) { |
| 323 return (void*) Metaspace::allocate(loader_data, word_size, read_only, | 324 return (void*) Metaspace::allocate(loader_data, word_size, read_only, |
| 324 MetaspaceObj::array_type(sizeof(T)), CHECK_NULL); | 325 MetaspaceObj::array_type(sizeof(T)), CHECK_NULL); |
| 325 } | 326 } |
| 326 | 327 |
| 327 static size_t byte_sizeof(int length) { return sizeof(Array<T>) + MAX2(length - 1, 0) * sizeof(T); } | 328 static size_t byte_sizeof(int length) { return sizeof(Array<T>) + MAX2(length - 1, 0) * sizeof(T); } |
| 329 | |
| 330 // WhiteBox API helper. | |
| 331 static int bytes_to_length(size_t bytes) { | |
| 332 assert(is_size_aligned(bytes, BytesPerWord), "Must be, for now"); | |
| 333 | |
| 334 if (sizeof(Array<T>) >= bytes) { | |
| 335 return 0; | |
| 336 } | |
| 337 | |
| 338 size_t left = bytes - sizeof(Array<T>); | |
| 339 assert(is_size_aligned(left, sizeof(T)), "Must be"); | |
| 340 | |
| 341 size_t elements = left / sizeof(T); | |
| 342 assert(elements <= (size_t)INT_MAX, err_msg("number of elements " SIZE_FORMAT "doesn't fit into an int.", elements)); | |
| 343 | |
| 344 int length = (int)elements; | |
| 345 | |
| 346 assert((size_t)size(length) * BytesPerWord == bytes, | |
| 347 err_msg("Expected: " SIZE_FORMAT " got: " SIZE_FORMAT, | |
| 348 bytes, (size_t)size(length) * BytesPerWord)); | |
| 349 | |
| 350 return length; | |
| 351 } | |
| 328 | 352 |
| 329 explicit Array(int length) : _length(length) { | 353 explicit Array(int length) : _length(length) { |
| 330 assert(length >= 0, "illegal length"); | 354 assert(length >= 0, "illegal length"); |
| 331 } | 355 } |
| 332 | 356 |
