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_jni_ByteArrayCriticalLocker
  35  * Method:    criticalNative
  36  */
  37 JNIEXPORT jbyte JNICALL Java_nsk_share_gc_lock_jni_ByteArrayCriticalLocker_criticalNative
  38 (JNIEnv *jni_env, jobject o, jlong enterTime, jlong sleepTime) {
  39         ExceptionCheckingJniEnvPtr env(jni_env);
  40 
  41         jsize size, i;
  42         jbyteArray arr;
  43         jbyte *pa;
  44         jbyte hash = 0;
  45         time_t start_time, current_time;
  46 
  47         if (objFieldId == NULL) {
  48                 jclass klass = env->GetObjectClass(o);
  49                 objFieldId = env->GetFieldID(klass, "obj", "Ljava/lang/Object;");
  50         }
  51         arr = (jbyteArray) env->GetObjectField(o, objFieldId);
  52         env->SetObjectField(o, objFieldId, NULL);
  53 
  54         size = env->GetArrayLength(arr);
  55         start_time = time(NULL);
  56         enterTime /= 1000;
  57         current_time = 0;
  58         while (current_time - start_time < enterTime) {
  59                 pa = (jbyte*) env->GetPrimitiveArrayCritical(arr, NULL);
  60                 if (pa != NULL) {
  61                         for (i = 0; i < size; ++i)
  62                                 hash ^= pa[i];
  63                 } else {
  64                         hash = 0;
  65                 }
  66                 mssleep((long) sleepTime);
  67                 env->ReleasePrimitiveArrayCritical(arr, pa, 0);
  68                 mssleep((long) sleepTime);
  69                 current_time = time(NULL);
  70         }
  71         env->SetObjectField(o, objFieldId, arr);
  72         return hash;
  73 }
  74 
  75 }

  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_jni_ByteArrayCriticalLocker
  35  * Method:    criticalNative
  36  */
  37 JNIEXPORT jbyte JNICALL Java_nsk_share_gc_lock_jni_ByteArrayCriticalLocker_criticalNative
  38 (JNIEnv *jni_env, jobject o, jlong enterTime, jlong sleepTime) {
  39         ExceptionCheckingJniEnvPtr jni(jni_env);
  40 
  41         jsize size, i;
  42         jbyteArray arr;
  43         jbyte *pa;
  44         jbyte hash = 0;
  45         time_t start_time, current_time;
  46 
  47         if (objFieldId == NULL) {
  48                 jclass klass = jni->GetObjectClass(o, TRACE_JNI_CALL);
  49                 objFieldId = jni->GetFieldID(klass, "obj", "Ljava/lang/Object;", TRACE_JNI_CALL);
  50         }
  51         arr = (jbyteArray) jni->GetObjectField(o, objFieldId, TRACE_JNI_CALL);
  52         jni->SetObjectField(o, objFieldId, NULL, TRACE_JNI_CALL);
  53 
  54         size = jni->GetArrayLength(arr, TRACE_JNI_CALL);
  55         start_time = time(NULL);
  56         enterTime /= 1000;
  57         current_time = 0;
  58         while (current_time - start_time < enterTime) {
  59                 pa = (jbyte*) jni->GetPrimitiveArrayCritical(arr, NULL, TRACE_JNI_CALL);
  60                 if (pa != NULL) {
  61                         for (i = 0; i < size; ++i)
  62                                 hash ^= pa[i];
  63                 } else {
  64                         hash = 0;
  65                 }
  66                 mssleep((long) sleepTime);
  67                 jni->ReleasePrimitiveArrayCritical(arr, pa, 0, TRACE_JNI_CALL);
  68                 mssleep((long) sleepTime);
  69                 current_time = time(NULL);
  70         }
  71         jni->SetObjectField(o, objFieldId, arr, TRACE_JNI_CALL);
  72         return hash;
  73 }
  74 
  75 }