bridges/source/jni_uno/nativethreadpool.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20
  21 #include <string.h>
  22 #include "jvmaccess/virtualmachine.hxx"
  23 #include "rtl/byteseq.h"
  24 #include "rtl/byteseq.hxx"
  25 #include "rtl/ref.hxx"
  26 #include "sal/types.h"
  27 #include "uno/threadpool.h"
  28
  29 #include "jni.h"
  30
  31 #include <new>
  32
  33 /* The native implementation part of
  34  * jurt/com/sun/star/lib/uno/environments/remote/NativeThreadPool.java.
  35  */
  36
  37 namespace {
  38
  39 struct Pool {
  40     Pool(rtl::Reference< jvmaccess::VirtualMachine > const & theVirtualMachine,
  41          jmethodID theExecute, uno_ThreadPool thePool):
  42         virtualMachine(theVirtualMachine), execute(theExecute), pool(thePool) {}
  43
  44     rtl::Reference< jvmaccess::VirtualMachine > virtualMachine;
  45     jmethodID execute;
  46     uno_ThreadPool pool;
  47 };
  48
  49 struct Job {
  50     Job(Pool * thePool, jobject theJob): pool(thePool), job(theJob) {}
  51
  52     Pool * pool;
  53     jobject job;
  54 };
  55
  56 void throwOutOfMemory(JNIEnv * env) {
  57     jclass c = env->FindClass("java/lang/OutOfMemoryError");
  58     if (c != 0) {
  59         env->ThrowNew(c, "");
  60     }
  61 }
  62
  63 }
  64
  65 extern "C" {
  66
  67 static void SAL_CALL executeRequest(void * data) {
  68     Job * job = static_cast< Job * >(data);
  69     try {
  70         jvmaccess::VirtualMachine::AttachGuard guard(job->pool->virtualMachine);
  71         JNIEnv * env = guard.getEnvironment();
  72         // Failure of the following Job.execute Java call is ignored; if that
  73         // call fails, it should be due to a java.lang.Error, which is not
  74         // handled well, anyway:
  75         env->CallObjectMethod(job->job, job->pool->execute);
  76         env->DeleteGlobalRef(job->job);
  77         delete job;
  78     } catch (const jvmaccess::VirtualMachine::AttachGuard::CreationException &) {
  79         //TODO: DeleteGlobalRef(job->job)
  80         delete job;
  81     }
  82 }
  83
  84 }
  85
  86 extern "C" SAL_JNI_EXPORT jbyteArray JNICALL
  87 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_threadId(
  88     JNIEnv * env, SAL_UNUSED_PARAMETER jclass) SAL_THROW_EXTERN_C()
  89 {
  90     sal_Sequence * s = 0;
  91     uno_getIdOfCurrentThread(&s); //TODO: out of memory
  92     uno_releaseIdFromCurrentThread();
  93     rtl::ByteSequence seq(s);
  94     rtl_byte_sequence_release(s);
  95     sal_Int32 n = seq.getLength();
  96     jbyteArray a = env->NewByteArray(n);
  97         // sal_Int32 and jsize are compatible here
  98     if (a == 0) {
  99         return 0;
 100     }
 101     void * p = env->GetPrimitiveArrayCritical(a, 0);
 102     if (p == 0) {
 103         return 0;
 104     }
 105     memcpy(p, seq.getConstArray(), n);
 106         // sal_Int8 and jbyte ought to be compatible
 107     env->ReleasePrimitiveArrayCritical(a, p, 0);
 108     return a;
 109 }
 110
 111 extern "C" SAL_JNI_EXPORT jlong JNICALL
 112 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_create(
 113     JNIEnv * env, SAL_UNUSED_PARAMETER jclass) SAL_THROW_EXTERN_C()
 114 {
 115     JavaVM * vm;
 116     if (env->GetJavaVM(&vm) != JNI_OK) { //TODO: no Java exception raised?
 117         jclass c = env->FindClass("java/lang/RuntimeException");
 118         if (c != 0) {
 119             env->ThrowNew(c, "JNI GetJavaVM failed");
 120         }
 121         return 0;
 122     }
 123     jclass c = env->FindClass("com/sun/star/lib/uno/environments/remote/Job");
 124     if (c == 0) {
 125         return 0;
 126     }
 127     jmethodID execute = env->GetMethodID(c, "execute", "()Ljava/lang/Object;");
 128     if (execute == 0) {
 129         return 0;
 130     }
 131     try {
 132         return reinterpret_cast< jlong >(new Pool(
 133             new jvmaccess::VirtualMachine(vm, env->GetVersion(), false, env),
 134             execute, uno_threadpool_create()));
 135     } catch (const std::bad_alloc &) {
 136         throwOutOfMemory(env);
 137         return 0;
 138     }
 139 }
 140
 141 extern "C" SAL_JNI_EXPORT void JNICALL
 142 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_attach(
 143     SAL_UNUSED_PARAMETER JNIEnv *, SAL_UNUSED_PARAMETER jclass, jlong pool)
 144     SAL_THROW_EXTERN_C()
 145 {
 146     uno_threadpool_attach(reinterpret_cast< Pool * >(pool)->pool);
 147 }
 148
 149 extern "C" SAL_JNI_EXPORT jobject JNICALL
 150 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_enter(
 151     JNIEnv * env, SAL_UNUSED_PARAMETER jclass, jlong pool) SAL_THROW_EXTERN_C()
 152 {
 153     jobject job;
 154     uno_threadpool_enter(
 155         reinterpret_cast< Pool * >(pool)->pool,
 156         reinterpret_cast< void ** >(&job));
 157     if (job == 0) {
 158         return 0;
 159     }
 160     jobject ref = env->NewLocalRef(job);
 161     env->DeleteGlobalRef(job);
 162     return ref;
 163 }
 164
 165 extern "C" SAL_JNI_EXPORT void JNICALL
 166 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_detach(
 167     SAL_UNUSED_PARAMETER JNIEnv *, SAL_UNUSED_PARAMETER jclass, jlong pool)
 168     SAL_THROW_EXTERN_C()
 169 {
 170     uno_threadpool_detach(reinterpret_cast< Pool * >(pool)->pool);
 171 }
 172
 173 extern "C" SAL_JNI_EXPORT void JNICALL
 174 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_putJob(
 175     JNIEnv * env, SAL_UNUSED_PARAMETER jclass, jlong pool, jbyteArray threadId,
 176     jobject job, jboolean request, jboolean oneWay) SAL_THROW_EXTERN_C()
 177 {
 178     void * s = env->GetPrimitiveArrayCritical(threadId, 0);
 179     if (s == 0) {
 180         return;
 181     }
 182     rtl::ByteSequence seq(
 183         static_cast< sal_Int8 * >(s), env->GetArrayLength(threadId));
 184         // sal_Int8 and jbyte ought to be compatible; sal_Int32 and jsize are
 185         // compatible here
 186         //TODO: out of memory
 187     env->ReleasePrimitiveArrayCritical(threadId, s, JNI_ABORT);
 188     Pool * p = reinterpret_cast< Pool * >(pool);
 189     jobject ref = env->NewGlobalRef(job);
 190     if (ref == 0) {
 191         return;
 192     }
 193     Job * j = 0;
 194     if (request) {
 195         j = new(std::nothrow) Job(p, ref);
 196         if (j == 0) {
 197             env->DeleteGlobalRef(ref);
 198             throwOutOfMemory(env);
 199             return;
 200         }
 201     }
 202     uno_threadpool_putJob(
 203         p->pool, seq.getHandle(),
 204         request ? static_cast< void * >(j) : static_cast< void * >(ref),
 205         request ? executeRequest : 0, oneWay);
 206 }
 207
 208 extern "C" SAL_JNI_EXPORT void JNICALL
 209 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_dispose(
 210     SAL_UNUSED_PARAMETER JNIEnv *, SAL_UNUSED_PARAMETER jclass, jlong pool)
 211     SAL_THROW_EXTERN_C()
 212 {
 213     uno_threadpool_dispose(reinterpret_cast< Pool * >(pool)->pool);
 214 }
 215
 216 extern "C" SAL_JNI_EXPORT void JNICALL
 217 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_destroy(
 218     SAL_UNUSED_PARAMETER JNIEnv *, SAL_UNUSED_PARAMETER jclass, jlong pool)
 219     SAL_THROW_EXTERN_C()
 220 {
 221     Pool * p = reinterpret_cast< Pool * >(pool);
 222     uno_threadpool_destroy(p->pool);
 223     delete p;
 224 }
 225
 226 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */