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 "gc/shared/concurrentGCThread.hpp"
27 #include "runtime/init.hpp"
28 #include "runtime/mutexLocker.hpp"
29 #include "runtime/orderAccess.hpp"
30 #include "runtime/os.hpp"
31
32 ConcurrentGCThread::ConcurrentGCThread() :
33 _monitor(Monitor::leaf, "ConcurrentGCThread"),
34 _should_terminate(false),
35 _has_terminated(false) {}
36
37 void ConcurrentGCThread::create_and_start(ThreadPriority prio) {
38 if (os::create_thread(this, os::cgc_thread)) {
39 os::set_priority(this, prio);
40 os::start_thread(this);
41 }
42 }
43
44 void ConcurrentGCThread::run() {
45 // Setup handle area
46 set_active_handles(JNIHandleBlock::allocate_block());
47
48 // Wait for initialization to complete
49 wait_init_completed();
50
51 run_service();
52
53 // Signal thread has terminated
54 MonitorLockerEx ml(&_monitor);
55 OrderAccess::release_store(&_has_terminated, true);
56 ml.notify_all();
57 }
58
59 void ConcurrentGCThread::stop() {
60 assert(!should_terminate(), "Invalid state");
61 assert(!has_terminated(), "Invalid state");
62
63 // Signal thread to terminate
64 OrderAccess::release_store(&_should_terminate, true);
65
66 stop_service();
67
68 // Wait for thread to terminate
69 MonitorLockerEx ml(&_monitor);
70 while (!_has_terminated) {
71 ml.wait();
72 }
73 }
74
75 bool ConcurrentGCThread::should_terminate() {
76 return OrderAccess::load_acquire(&_should_terminate);
77 }
78
79 bool ConcurrentGCThread::has_terminated() {
80 return OrderAccess::load_acquire(&_has_terminated);
81 }
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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 "gc/shared/concurrentGCThread.hpp"
27 #include "runtime/init.hpp"
28 #include "runtime/mutexLocker.hpp"
29 #include "runtime/orderAccess.hpp"
30 #include "runtime/os.hpp"
31
32 ConcurrentGCThread::ConcurrentGCThread() :
33 _should_terminate(false),
34 _has_terminated(false) {}
35
36 void ConcurrentGCThread::create_and_start(ThreadPriority prio) {
37 if (os::create_thread(this, os::cgc_thread)) {
38 os::set_priority(this, prio);
39 os::start_thread(this);
40 }
41 }
42
43 void ConcurrentGCThread::run() {
44 // Setup handle area
45 set_active_handles(JNIHandleBlock::allocate_block());
46
47 // Wait for initialization to complete
48 wait_init_completed();
49
50 run_service();
51
52 // Signal thread has terminated
53 MonitorLockerEx ml(Terminator_lock);
54 OrderAccess::release_store(&_has_terminated, true);
55 ml.notify_all();
56 }
57
58 void ConcurrentGCThread::stop() {
59 assert(!should_terminate(), "Invalid state");
60 assert(!has_terminated(), "Invalid state");
61
62 // Signal thread to terminate
63 OrderAccess::release_store(&_should_terminate, true);
64
65 stop_service();
66
67 // Wait for thread to terminate
68 MonitorLockerEx ml(Terminator_lock);
69 while (!_has_terminated) {
70 ml.wait();
71 }
72 }
73
74 bool ConcurrentGCThread::should_terminate() {
75 return OrderAccess::load_acquire(&_should_terminate);
76 }
77
78 bool ConcurrentGCThread::has_terminated() {
79 return OrderAccess::load_acquire(&_has_terminated);
80 }
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