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 #include <jni.h>
24 #include <stdio.h>
25 #include <time.h>
26 #include "jni_tools.h"
27
28 extern "C" {
29
30 static jfieldID objFieldId = NULL;
31
32 /*
33 * Class: nsk_share_gc_lock_jniref_JNIWeakGlobalRefLocker
34 * Method: criticalNative
35 * Signature: (JJ)V
36 */
37 JNIEXPORT void JNICALL Java_nsk_share_gc_lock_jniref_JNIWeakGlobalRefLocker_criticalNative
38 (JNIEnv *env, jobject o, jlong enterTime, jlong sleepTime) {
39 jobject obj;
40 jobject gref;
41 time_t start_time, current_time;
42
43 if (objFieldId == NULL) {
44 jclass klass = env->GetObjectClass(o);
45 if (klass == NULL) {
46 printf("Error: GetObjectClass returned NULL\n");
47 return;
48 }
49 objFieldId = env->GetFieldID(klass, "obj", "Ljava/lang/Object;");
50 if (objFieldId == NULL) {
51 printf("Error: GetFieldID returned NULL\n");
52 return;
53 }
54 }
55 obj = env->GetObjectField(o, objFieldId);
56 if (obj == NULL) {
57 printf("Error: GetObjectField returned NULL\n");
58 return;
59 }
60 env->SetObjectField(o, objFieldId, NULL);
61 start_time = time(NULL);
62 enterTime /= 1000;
63 current_time = 0;
64 while (current_time - start_time < enterTime) {
65 gref = env->NewWeakGlobalRef(obj);
66 mssleep((long) sleepTime);
67 env->DeleteWeakGlobalRef(gref);
68 mssleep((long) sleepTime);
69 current_time = time(NULL);
70 }
71 env->SetObjectField(o, objFieldId, obj);
72 }
73
74 }
|
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 #include <jni.h>
24 #include <stdio.h>
25 #include <time.h>
26 #include "ExceptionCheckingJniEnv.hpp"
27 #include "jni_tools.h"
28
29 extern "C" {
30
31 static jfieldID objFieldId = NULL;
32
33 /*
34 * Class: nsk_share_gc_lock_jniref_JNIWeakGlobalRefLocker
35 * Method: criticalNative
36 * Signature: (JJ)V
37 */
38 JNIEXPORT void JNICALL Java_nsk_share_gc_lock_jniref_JNIWeakGlobalRefLocker_criticalNative
39 (JNIEnv *jni_env, jobject o, jlong enterTime, jlong sleepTime) {
40 ExceptionCheckingJniEnvPtr env(jni_env);
41
42 jobject obj;
43 jobject gref;
44 time_t start_time, current_time;
45
46 if (objFieldId == NULL) {
47 jclass klass = env->GetObjectClass(o);
48 objFieldId = env->GetFieldID(klass, "obj", "Ljava/lang/Object;");
49 }
50 obj = env->GetObjectField(o, objFieldId);
51 env->SetObjectField(o, objFieldId, NULL);
52
53 start_time = time(NULL);
54 enterTime /= 1000;
55 current_time = 0;
56 while (current_time - start_time < enterTime) {
57 gref = env->NewWeakGlobalRef(obj);
58 mssleep((long) sleepTime);
59 env->DeleteWeakGlobalRef(gref);
60 mssleep((long) sleepTime);
61 current_time = time(NULL);
62 }
63 env->SetObjectField(o, objFieldId, obj);
64 }
65
66 }
|