256 #ifndef PRODUCT
257 bool ClassLoaderData::ChunkedHandleList::owner_of(oop* oop_handle) {
258 Chunk* chunk = _head;
259 while (chunk != NULL) {
260 if (&(chunk->_data[0]) <= oop_handle && oop_handle < &(chunk->_data[chunk->_size])) {
261 return true;
262 }
263 chunk = chunk->_next;
264 }
265 return false;
266 }
267 #endif // PRODUCT
268
269 void ClassLoaderData::clear_claim(int claim) {
270 for (;;) {
271 int old_claim = Atomic::load(&_claim);
272 if ((old_claim & claim) == 0) {
273 return;
274 }
275 int new_claim = old_claim & ~claim;
276 if (Atomic::cmpxchg(new_claim, &_claim, old_claim) == old_claim) {
277 return;
278 }
279 }
280 }
281
282 bool ClassLoaderData::try_claim(int claim) {
283 for (;;) {
284 int old_claim = Atomic::load(&_claim);
285 if ((old_claim & claim) == claim) {
286 return false;
287 }
288 int new_claim = old_claim | claim;
289 if (Atomic::cmpxchg(new_claim, &_claim, old_claim) == old_claim) {
290 return true;
291 }
292 }
293 }
294
295 // Unsafe anonymous classes have their own ClassLoaderData that is marked to keep alive
296 // while the class is being parsed, and if the class appears on the module fixup list.
297 // Due to the uniqueness that no other class shares the unsafe anonymous class' name or
298 // ClassLoaderData, no other non-GC thread has knowledge of the unsafe anonymous class while
299 // it is being defined, therefore _keep_alive is not volatile or atomic.
300 void ClassLoaderData::inc_keep_alive() {
301 if (is_unsafe_anonymous()) {
302 assert(_keep_alive > 0, "Invalid keep alive increment count");
303 _keep_alive++;
304 }
305 }
306
307 void ClassLoaderData::dec_keep_alive() {
308 if (is_unsafe_anonymous()) {
309 assert(_keep_alive > 0, "Invalid keep alive decrement count");
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256 #ifndef PRODUCT
257 bool ClassLoaderData::ChunkedHandleList::owner_of(oop* oop_handle) {
258 Chunk* chunk = _head;
259 while (chunk != NULL) {
260 if (&(chunk->_data[0]) <= oop_handle && oop_handle < &(chunk->_data[chunk->_size])) {
261 return true;
262 }
263 chunk = chunk->_next;
264 }
265 return false;
266 }
267 #endif // PRODUCT
268
269 void ClassLoaderData::clear_claim(int claim) {
270 for (;;) {
271 int old_claim = Atomic::load(&_claim);
272 if ((old_claim & claim) == 0) {
273 return;
274 }
275 int new_claim = old_claim & ~claim;
276 if (Atomic::cmpxchg(&_claim, old_claim, new_claim) == old_claim) {
277 return;
278 }
279 }
280 }
281
282 bool ClassLoaderData::try_claim(int claim) {
283 for (;;) {
284 int old_claim = Atomic::load(&_claim);
285 if ((old_claim & claim) == claim) {
286 return false;
287 }
288 int new_claim = old_claim | claim;
289 if (Atomic::cmpxchg(&_claim, old_claim, new_claim) == old_claim) {
290 return true;
291 }
292 }
293 }
294
295 // Unsafe anonymous classes have their own ClassLoaderData that is marked to keep alive
296 // while the class is being parsed, and if the class appears on the module fixup list.
297 // Due to the uniqueness that no other class shares the unsafe anonymous class' name or
298 // ClassLoaderData, no other non-GC thread has knowledge of the unsafe anonymous class while
299 // it is being defined, therefore _keep_alive is not volatile or atomic.
300 void ClassLoaderData::inc_keep_alive() {
301 if (is_unsafe_anonymous()) {
302 assert(_keep_alive > 0, "Invalid keep alive increment count");
303 _keep_alive++;
304 }
305 }
306
307 void ClassLoaderData::dec_keep_alive() {
308 if (is_unsafe_anonymous()) {
309 assert(_keep_alive > 0, "Invalid keep alive decrement count");
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