1 files changed, 227 insertions, 0 deletions
diff --git a/bridges/source/jni_uno/nativethreadpool.cxx b/bridges/source/jni_uno/nativethreadpool.cxx
new file mode 100644
index 000000000..1d14c47bb
--- /dev/null
+++ b/bridges/source/jni_uno/nativethreadpool.cxx
@@ -0,0 +1,227 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+
+#include <string.h>
+#include <jvmaccess/virtualmachine.hxx>
+#include <rtl/byteseq.h>
+#include <rtl/byteseq.hxx>
+#include <rtl/ref.hxx>
+#include <sal/types.h>
+#include <uno/threadpool.h>
+
+#include <jni.h>
+
+#include <new>
+#include <utility>
+
+/* The native implementation part of
+ * jurt/com/sun/star/lib/uno/environments/remote/NativeThreadPool.java.
+ */
+
+namespace {
+
+struct Pool {
+    Pool(rtl::Reference< jvmaccess::VirtualMachine > theVirtualMachine,
+         jmethodID theExecute, uno_ThreadPool thePool):
+        virtualMachine(std::move(theVirtualMachine)), execute(theExecute), pool(thePool) {}
+
+    rtl::Reference< jvmaccess::VirtualMachine > virtualMachine;
+    jmethodID execute;
+    uno_ThreadPool pool;
+};
+
+struct Job {
+    Job(Pool * thePool, jobject theJob): pool(thePool), job(theJob) {}
+
+    Pool * pool;
+    jobject job;
+};
+
+void throwOutOfMemory(JNIEnv * env) {
+    jclass c = env->FindClass("java/lang/OutOfMemoryError");
+    if (c != nullptr) {
+        env->ThrowNew(c, "");
+    }
+}
+
+}
+
+extern "C" {
+
+static void executeRequest(void * data) {
+    Job * job = static_cast< Job * >(data);
+    try {
+        jvmaccess::VirtualMachine::AttachGuard guard(job->pool->virtualMachine);
+        JNIEnv * env = guard.getEnvironment();
+        // Failure of the following Job.execute Java call is ignored; if that
+        // call fails, it should be due to a java.lang.Error, which is not
+        // handled well, anyway:
+        env->CallObjectMethod(job->job, job->pool->execute);
+        env->DeleteGlobalRef(job->job);
+        delete job;
+    } catch (const jvmaccess::VirtualMachine::AttachGuard::CreationException &) {
+        //TODO: DeleteGlobalRef(job->job)
+        delete job;
+    }
+}
+
+}
+
+extern "C" SAL_JNI_EXPORT jbyteArray JNICALL
+Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_threadId(
+    JNIEnv * env, SAL_UNUSED_PARAMETER jclass) SAL_THROW_EXTERN_C()
+{
+    sal_Sequence * s = nullptr;
+    uno_getIdOfCurrentThread(&s); //TODO: out of memory
+    uno_releaseIdFromCurrentThread();
+    rtl::ByteSequence seq(s);
+    rtl_byte_sequence_release(s);
+    sal_Int32 n = seq.getLength();
+    jbyteArray a = env->NewByteArray(n);
+        // sal_Int32 and jsize are compatible here
+    if (a == nullptr) {
+        return nullptr;
+    }
+    void * p = env->GetPrimitiveArrayCritical(a, nullptr);
+    if (p == nullptr) {
+        return nullptr;
+    }
+    memcpy(p, seq.getConstArray(), n);
+        // sal_Int8 and jbyte ought to be compatible
+    env->ReleasePrimitiveArrayCritical(a, p, 0);
+    return a;
+}
+
+extern "C" SAL_JNI_EXPORT jlong JNICALL
+Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_create(
+    JNIEnv * env, SAL_UNUSED_PARAMETER jclass) SAL_THROW_EXTERN_C()
+{
+    JavaVM * vm;
+    if (env->GetJavaVM(&vm) != JNI_OK) { //TODO: no Java exception raised?
+        jclass c = env->FindClass("java/lang/RuntimeException");
+        if (c != nullptr) {
+            env->ThrowNew(c, "JNI GetJavaVM failed");
+        }
+        return 0;
+    }
+    jclass c = env->FindClass("com/sun/star/lib/uno/environments/remote/Job");
+    if (c == nullptr) {
+        return 0;
+    }
+    jmethodID execute = env->GetMethodID(c, "execute", "()Ljava/lang/Object;");
+    if (execute == nullptr) {
+        return 0;
+    }
+    try {
+        return reinterpret_cast< jlong >(new Pool(
+            new jvmaccess::VirtualMachine(vm, env->GetVersion(), false, env),
+            execute, uno_threadpool_create()));
+    } catch (const std::bad_alloc &) {
+        throwOutOfMemory(env);
+        return 0;
+    }
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL
+Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_attach(
+    SAL_UNUSED_PARAMETER JNIEnv *, SAL_UNUSED_PARAMETER jclass, jlong pool)
+    SAL_THROW_EXTERN_C()
+{
+    uno_threadpool_attach(reinterpret_cast< Pool * >(pool)->pool);
+}
+
+extern "C" SAL_JNI_EXPORT jobject JNICALL
+Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_enter(
+    JNIEnv * env, SAL_UNUSED_PARAMETER jclass, jlong pool) SAL_THROW_EXTERN_C()
+{
+    jobject job;
+    uno_threadpool_enter(
+        reinterpret_cast< Pool * >(pool)->pool,
+        reinterpret_cast< void ** >(&job));
+    if (job == nullptr) {
+        return nullptr;
+    }
+    jobject ref = env->NewLocalRef(job);
+    env->DeleteGlobalRef(job);
+    return ref;
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL
+Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_detach(
+    SAL_UNUSED_PARAMETER JNIEnv *, SAL_UNUSED_PARAMETER jclass, jlong pool)
+    SAL_THROW_EXTERN_C()
+{
+    uno_threadpool_detach(reinterpret_cast< Pool * >(pool)->pool);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL
+Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_putJob(
+    JNIEnv * env, SAL_UNUSED_PARAMETER jclass, jlong pool, jbyteArray threadId,
+    jobject job, jboolean request, jboolean oneWay) SAL_THROW_EXTERN_C()
+{
+    void * s = env->GetPrimitiveArrayCritical(threadId, nullptr);
+    if (s == nullptr) {
+        return;
+    }
+    rtl::ByteSequence seq(
+        static_cast< sal_Int8 * >(s), env->GetArrayLength(threadId));
+        // sal_Int8 and jbyte ought to be compatible; sal_Int32 and jsize are
+        // compatible here
+        //TODO: out of memory
+    env->ReleasePrimitiveArrayCritical(threadId, s, JNI_ABORT);
+    Pool * p = reinterpret_cast< Pool * >(pool);
+    jobject ref = env->NewGlobalRef(job);
+    if (ref == nullptr) {
+        return;
+    }
+    Job * j = nullptr;
+    if (request) {
+        j = new(std::nothrow) Job(p, ref);
+        if (j == nullptr) {
+            env->DeleteGlobalRef(ref);
+            throwOutOfMemory(env);
+            return;
+        }
+    }
+    uno_threadpool_putJob(
+        p->pool, seq.getHandle(),
+        request ? static_cast< void * >(j) : static_cast< void * >(ref),
+        request ? executeRequest : nullptr, oneWay);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL
+Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_dispose(
+    SAL_UNUSED_PARAMETER JNIEnv *, SAL_UNUSED_PARAMETER jclass, jlong pool)
+    SAL_THROW_EXTERN_C()
+{
+    uno_threadpool_dispose(reinterpret_cast< Pool * >(pool)->pool);
+}
+
+extern "C" SAL_JNI_EXPORT void JNICALL
+Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_destroy(
+    SAL_UNUSED_PARAMETER JNIEnv *, SAL_UNUSED_PARAMETER jclass, jlong pool)
+    SAL_THROW_EXTERN_C()
+{
+    Pool * p = reinterpret_cast< Pool * >(pool);
+    uno_threadpool_destroy(p->pool);
+    delete p;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */