threads setting

kmath-noa/src/main/java/space/kscience/kmath/noa/JNoa.java

@@ -10,17 +10,25 @@ public class JNoa {
     static {
         String jNoaPath = System.getProperty("user.home") +
                 "/devspace/noa/cmake-build-release/kmath/libjnoa.so";
-                //"/.konan/third-party/kmath-noa-0.3.0-dev-14/cpp-build/kmath/libjnoa.so";
+        //"/.konan/third-party/kmath-noa-0.3.0-dev-14/cpp-build/kmath/libjnoa.so";
 
         try {
             System.load(jNoaPath);
         } catch (UnsatisfiedLinkError e) {
             System.err.println("Failed to load native NOA library from:\n" +
-                    jNoaPath +"\n" + e);
+                    jNoaPath + "\n" + e);
             System.exit(1);
         }
     }
 
     public static native int testException(int seed);
+
     public static native boolean cudaIsAvailable();
+
+    public static native int getNumThreads();
+
+    public static native void setNumThreads(int numThreads);
+
+    public static native void setSeed(int seed);
 }
+

kmath-noa/src/main/kotlin/space/kscience/kmath/noa/utils.kt

@@ -8,3 +8,15 @@ package space.kscience.kmath.noa
 public fun cudaAvailable(): Boolean {
     return JNoa.cudaIsAvailable()
 }
+
+public fun getNumThreads(): Int {
+    return JNoa.getNumThreads()
+}
+
+public fun setNumThreads(numThreads: Int): Unit {
+    JNoa.setNumThreads(numThreads)
+}
+
+public fun setSeed(seed: Int): Unit {
+    JNoa.setSeed(seed)
+}

kmath-noa/src/main/resources/space_kscience_kmath_noa_JNoa.h

@@ -23,6 +23,30 @@ JNIEXPORT jint JNICALL Java_space_kscience_kmath_noa_JNoa_testException
 JNIEXPORT jboolean JNICALL Java_space_kscience_kmath_noa_JNoa_cudaIsAvailable
   (JNIEnv *, jclass);
 
+/*
+ * Class:     space_kscience_kmath_noa_JNoa
+ * Method:    getNumThreads
+ * Signature: ()I
+ */
+JNIEXPORT jint JNICALL Java_space_kscience_kmath_noa_JNoa_getNumThreads
+  (JNIEnv *, jclass);
+
+/*
+ * Class:     space_kscience_kmath_noa_JNoa
+ * Method:    setNumThreads
+ * Signature: (I)V
+ */
+JNIEXPORT void JNICALL Java_space_kscience_kmath_noa_JNoa_setNumThreads
+  (JNIEnv *, jclass, jint);
+
+/*
+ * Class:     space_kscience_kmath_noa_JNoa
+ * Method:    setSeed
+ * Signature: (I)V
+ */
+JNIEXPORT void JNICALL Java_space_kscience_kmath_noa_JNoa_setSeed
+  (JNIEnv *, jclass, jint);
+
 #ifdef __cplusplus
 }
 #endif

kmath-noa/src/test/kotlin/space/kscience/kmath/noa/TestUtils.kt

@@ -19,4 +19,11 @@ class TestUtils {
         }
         assertEquals(i, 10)
     }
+
+    @Test
+    fun settingNumThreads(){
+        val numThreads = 2
+        setNumThreads(numThreads)
+        assertEquals(numThreads, getNumThreads())
+    }
 }