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src/hotspot/share/runtime/threadSMR.cpp

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rev 47862 : imported patch 10.07.open.rebase_20171110.dcubed
rev 47865 : dholmes CR: Fix indents, trailing spaces and various typos. Add descriptions for the '_cnt', '_max' and '_times" fields, add impl notes to document the type choices.
rev 47867 : coleenp CR: Change ThreadsList::_threads from 'mtGC' -> 'mtThread', add header comment to threadSMR.hpp file, cleanup JavaThreadIteratorWithHandle ctr, make ErrorHandling more efficient.


  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 #include "precompiled.hpp"
  26 #include "memory/allocation.inline.hpp"
  27 #include "runtime/thread.inline.hpp"
  28 #include "runtime/threadSMR.hpp"
  29 #include "services/threadService.hpp"
  30 
  31 // 'entries + 1' so we always have at least one entry.
  32 ThreadsList::ThreadsList(int entries) : _length(entries), _threads(NEW_C_HEAP_ARRAY(JavaThread*, entries + 1, mtGC)), _next_list(NULL) {
  33   *(JavaThread**)(_threads + entries) = NULL;  // Make sure the extra entry is NULL.
  34 }
  35 
  36 ThreadsList::~ThreadsList() {
  37   FREE_C_HEAP_ARRAY(JavaThread*, _threads);
  38 }
  39 
  40 ThreadsListSetter::~ThreadsListSetter() {
  41   if (_target_needs_release) {
  42     // The hazard ptr in the target needs to be released.
  43     Threads::release_stable_list(_target);
  44   }
  45 }
  46 
  47 void ThreadsListSetter::set() {
  48   assert(_target->get_threads_hazard_ptr() == NULL, "hazard ptr should not already be set");
  49   (void) Threads::acquire_stable_list(_target, /* is_ThreadsListSetter */ true);
  50   _target_needs_release = true;
  51 }
  52 




  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 #include "precompiled.hpp"
  26 #include "memory/allocation.inline.hpp"
  27 #include "runtime/thread.inline.hpp"
  28 #include "runtime/threadSMR.hpp"
  29 #include "services/threadService.hpp"
  30 
  31 // 'entries + 1' so we always have at least one entry.
  32 ThreadsList::ThreadsList(int entries) : _length(entries), _threads(NEW_C_HEAP_ARRAY(JavaThread*, entries + 1, mtThread)), _next_list(NULL) {
  33   *(JavaThread**)(_threads + entries) = NULL;  // Make sure the extra entry is NULL.
  34 }
  35 
  36 ThreadsList::~ThreadsList() {
  37   FREE_C_HEAP_ARRAY(JavaThread*, _threads);
  38 }
  39 
  40 ThreadsListSetter::~ThreadsListSetter() {
  41   if (_target_needs_release) {
  42     // The hazard ptr in the target needs to be released.
  43     Threads::release_stable_list(_target);
  44   }
  45 }
  46 
  47 void ThreadsListSetter::set() {
  48   assert(_target->get_threads_hazard_ptr() == NULL, "hazard ptr should not already be set");
  49   (void) Threads::acquire_stable_list(_target, /* is_ThreadsListSetter */ true);
  50   _target_needs_release = true;
  51 }
  52
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