jdk8-mips64-public/hotspot: src/share/vm/runtime/task.cpp@c18cbe5936b8

6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair

     1 /*

     2  * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    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  */

    25 # include "incls/_precompiled.incl"

    26 # include "incls/_task.cpp.incl"

    28 int PeriodicTask::_num_tasks = 0;

    29 PeriodicTask* PeriodicTask::_tasks[PeriodicTask::max_tasks];

    30 #ifndef PRODUCT

    31 elapsedTimer PeriodicTask::_timer;

    32 int PeriodicTask::_intervalHistogram[PeriodicTask::max_interval];

    33 int PeriodicTask::_ticks;

    35 void PeriodicTask::print_intervals() {

    36   if (ProfilerCheckIntervals) {

    37     for (int i = 0; i < PeriodicTask::max_interval; i++) {

    38       int n = _intervalHistogram[i];

    39       if (n > 0) tty->print_cr("%3d: %5d (%4.1f%%)", i, n, 100.0 * n / _ticks);

    40     }

    41   }

    42 }

    43 #endif

    45 void PeriodicTask::real_time_tick(size_t delay_time) {

    46 #ifndef PRODUCT

    47   if (ProfilerCheckIntervals) {

    48     _ticks++;

    49     _timer.stop();

    50     int ms = (int)(_timer.seconds() * 1000.0);

    51     _timer.reset();

    52     _timer.start();

    53     if (ms >= PeriodicTask::max_interval) ms = PeriodicTask::max_interval - 1;

    54     _intervalHistogram[ms]++;

    55   }

    56 #endif

    57   int orig_num_tasks = _num_tasks;

    58   for(int index = 0; index < _num_tasks; index++) {

    59     _tasks[index]->execute_if_pending(delay_time);

    60     if (_num_tasks < orig_num_tasks) { // task dis-enrolled itself

    61       index--;  // re-do current slot as it has changed

    62       orig_num_tasks = _num_tasks;

    63     }

    64   }

    65 }

    68 PeriodicTask::PeriodicTask(size_t interval_time) :

    69   _counter(0), _interval(interval_time) {

    70   // Sanity check the interval time

    71   assert(_interval >= PeriodicTask::min_interval &&

    72          _interval <= PeriodicTask::max_interval &&

    73          _interval %  PeriodicTask::interval_gran == 0,

    74               "improper PeriodicTask interval time");

    75 }

    77 PeriodicTask::~PeriodicTask() {

    78   if (is_enrolled())

    79     disenroll();

    80 }

    82 bool PeriodicTask::is_enrolled() const {

    83   for(int index = 0; index < _num_tasks; index++)

    84     if (_tasks[index] == this) return true;

    85   return false;

    86 }

    88 void PeriodicTask::enroll() {

    89   assert(WatcherThread::watcher_thread() == NULL, "dynamic enrollment of tasks not yet supported");

    91   if (_num_tasks == PeriodicTask::max_tasks)

    92     fatal("Overflow in PeriodicTask table");

    93   _tasks[_num_tasks++] = this;

    94 }

    96 void PeriodicTask::disenroll() {

    97   assert(WatcherThread::watcher_thread() == NULL ||

    98          Thread::current() == WatcherThread::watcher_thread(),

    99          "dynamic disenrollment currently only handled from WatcherThread from within task() method");

   101   int index;

   102   for(index = 0; index < _num_tasks && _tasks[index] != this; index++);

   103   if (index == _num_tasks) return;

   104   _num_tasks--;

   105   for (; index < _num_tasks; index++) {

   106     _tasks[index] = _tasks[index+1];

   107   }

   108 }

Mercurial > jdk8-mips64-public > hotspot / file revision