clang and exceptions

kmath-noa/build.gradle.kts

@@ -27,14 +27,18 @@ val cppSources = projectDir.resolve("src/main/cpp")
 val cudaHome: String? = System.getenv("CUDA_HOME")
 val cudaDefault = file("/usr/local/cuda").exists()
 val cudaFound = cudaHome?.isNotEmpty() ?: false or cudaDefault
+
 val cmakeArchive = "cmake-3.20.5-linux-x86_64"
+val clangArchive = "clang+llvm-12.0.0-x86_64-linux-gnu-ubuntu-16.04"
 val torchArchive = "libtorch"
 
 val cmakeCmd = "$thirdPartyDir/cmake/$cmakeArchive/bin/cmake"
+val clangRootDir = "$thirdPartyDir/clang/$clangArchive"
+val clangCmd = "$clangRootDir/bin/clang"
+val clangxxCmd = "$clangRootDir/bin/clang++"
 val ninjaCmd = "$thirdPartyDir/ninja/ninja"
 
 val generateJNIHeader by tasks.registering {
-    println(cmakeCmd)
     doLast {
         exec {
             workingDir(projectDir.resolve("src/main/java/space/kscience/kmath/noa"))
@@ -50,6 +54,13 @@ val downloadCMake by tasks.registering(Download::class) {
     overwrite(false)
 }
 
+val downloadClang by tasks.registering(Download::class) {
+    val tarFile = "$clangArchive.tar.xz"
+    src("https://github.com/llvm/llvm-project/releases/download/llvmorg-12.0.0/$tarFile")
+    dest(File("$thirdPartyDir/clang", tarFile))
+    overwrite(false)
+}
+
 val downloadNinja by tasks.registering(Download::class) {
     src("https://github.com/ninja-build/ninja/releases/download/v1.10.2/ninja-linux.zip")
     dest(File("$thirdPartyDir/ninja", "ninja-linux.zip"))
@@ -72,6 +83,17 @@ val extractCMake by tasks.registering(Copy::class) {
     into("$thirdPartyDir/cmake")
 }
 
+val extractClang by tasks.registering {
+    dependsOn(downloadClang)
+    onlyIf { !file(clangRootDir).exists() }
+    doLast {
+        exec {
+            workingDir("$thirdPartyDir/clang")
+            commandLine("tar", "-xf", "$clangArchive.tar.xz")
+        }
+    }
+}
+
 val extractNinja by tasks.registering(Copy::class) {
     dependsOn(downloadNinja)
     from(zipTree(downloadNinja.get().dest))
@@ -86,6 +108,7 @@ val extractTorch by tasks.registering(Copy::class) {
 
 val configureCpp by tasks.registering {
     dependsOn(extractCMake)
+    dependsOn(extractClang)
     dependsOn(extractNinja)
     dependsOn(extractTorch)
     onlyIf { !file(cppBuildDir).exists() }
@@ -100,6 +123,8 @@ val configureCpp by tasks.registering {
                 cmakeCmd,
                 cppSources,
                 "-GNinja",
+                "-DCMAKE_C_COMPILER=$clangCmd",
+                "-DCMAKE_CXX_COMPILER=$clangxxCmd",
                 "-DCMAKE_MAKE_PROGRAM=$ninjaCmd",
                 "-DCMAKE_PREFIX_PATH=$thirdPartyDir/torch/$torchArchive",
                 "-DJAVA_HOME=$javaHome",

kmath-noa/src/main/cpp/jnoa.cc

@@ -1,17 +1,47 @@
 /*
- * Copyright 2018-2021 KMath contributors.
+ * BSD 2-Clause License
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ *
+ * Copyright (c) 2021, Roland Grinis, GrinisRIT ltd. (roland.grinis@grinisrit.com)
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-
 #include <noa/ghmc.hh>
 #include <torch/torch.h>
 
-
 #include "space_kscience_kmath_noa_JNoa.h"
 
-
+JNIEXPORT jboolean JNICALL Java_space_kscience_kmath_noa_JNoa_cudaIsAvailable(JNIEnv *env, jclass)
-JNIEXPORT jboolean JNICALL Java_space_kscience_kmath_noa_JNoa_cudaIsAvailable(JNIEnv *, jclass)
 {
+    jclass noa_exception = env->FindClass("space/kscience/kmath/noa/NoaException");
+    try
+    {
+        std::cout << (torch::rand({2, 3}) + torch::rand({3, 2})) << "\n";
+    }
+    catch (const std::exception &e)
+    {
+        std::cout << "caught that in C++\n";
+        env->ThrowNew(noa_exception, e.what());
+    }
     return torch::cuda::is_available();
 }

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

@@ -0,0 +1,12 @@
+/*
+ * Copyright 2018-2021 KMath contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package space.kscience.kmath.noa;
+
+public class NoaException extends Exception {
+    public NoaException(String errorMessage) {
+        super(errorMessage);
+    }
+}

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

@@ -10,7 +10,12 @@ import kotlin.test.Test
 class TestUtils {
 
     @Test
-    fun checkCuda() {
+    fun testExceptions() {
-        println(cudaAvailable())
+        try {
+            println(cudaAvailable())
+        } catch(e:NoaException) {
+            println(e)
+            println("ALL GOOD")
+        }
     }
 }