test/hotspot/jtreg/gc/g1/libTestPeriodicCollectionJNI.c

rev 53920 : imported patch 8218880-g1-crashes-periodic-gc-gclocker
rev 53921 : [mq]: 8218880-shade-review

@@ -25,21 +25,37 @@
  * Native support for TestPeriodicCollectionJNI test.
  */
 
 #include "jni.h"
 
+#ifdef WINDOWS
+#include <windows.h>
+#else
+#include <unistd.h>
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 static volatile int release_critical = 0;
 
 JNIEXPORT jboolean JNICALL
 Java_gc_g1_TestPeriodicCollectionJNI_blockInNative(JNIEnv* env, jobject obj, jintArray dummy) {
     void* native_array = (*env)->GetPrimitiveArrayCritical(env, dummy, 0);
 
     if (native_array == NULL) {
         return JNI_FALSE;
     }
 
-    while (!release_critical) /* empty */;
+    while (!release_critical) {
+#ifdef WINDOWS
+        Sleep(1);
+#else
+        usleep(1000);
+#endif
+    }
 
     (*env)->ReleasePrimitiveArrayCritical(env, dummy, native_array, 0);
 
     return JNI_TRUE;
 }

@@ -47,5 +63,9 @@
 JNIEXPORT void JNICALL Java_gc_g1_TestPeriodicCollectionJNI_unblock(JNIEnv *env, jobject obj)
 {
     release_critical = 1;
 }
 
+#ifdef __cplusplus
+}
+#endif
+