bridges/source/jni_uno/nativethreadpool.cxx

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  28
  29
  30 #include "jvmaccess/virtualmachine.hxx"
  31 #include "rtl/byteseq.h"
  32 #include "rtl/byteseq.hxx"
  33 #include "rtl/memory.h"
  34 #include "rtl/ref.hxx"
  35 #include "sal/types.h"
  36 #include "uno/threadpool.h"
  37
  38 #include "jni.h"
  39
  40 #include <new>
  41
  42 /* The native implementation part of
  43  * jurt/com/sun/star/lib/uno/environments/remote/NativeThreadPool.java.
  44  */
  45
  46 namespace {
  47
  48 struct Pool {
  49     Pool(rtl::Reference< jvmaccess::VirtualMachine > const & theVirtualMachine,
  50          jmethodID theExecute, uno_ThreadPool thePool):
  51         virtualMachine(theVirtualMachine), execute(theExecute), pool(thePool) {}
  52
  53     rtl::Reference< jvmaccess::VirtualMachine > virtualMachine;
  54     jmethodID execute;
  55     uno_ThreadPool pool;
  56 };
  57
  58 struct Job {
  59     Job(Pool * thePool, jobject theJob): pool(thePool), job(theJob) {}
  60
  61     Pool * pool;
  62     jobject job;
  63 };
  64
  65 void throwOutOfMemory(JNIEnv * env) {
  66     jclass c = env->FindClass("java/lang/OutOfMemoryError");
  67     if (c != 0) {
  68         env->ThrowNew(c, "");
  69     }
  70 }
  71
  72 }
  73
  74 extern "C" {
  75
  76 static void SAL_CALL executeRequest(void * data) {
  77     Job * job = static_cast< Job * >(data);
  78     try {
  79         jvmaccess::VirtualMachine::AttachGuard guard(job->pool->virtualMachine);
  80         JNIEnv * env = guard.getEnvironment();
  81         // Failure of the following Job.execute Java call is ignored; if that
  82         // call fails, it should be due to a java.lang.Error, which is not
  83         // handled well, anyway:
  84         env->CallObjectMethod(job->job, job->pool->execute);
  85         env->DeleteGlobalRef(job->job);
  86         delete job;
  87     } catch (const jvmaccess::VirtualMachine::AttachGuard::CreationException &) {
  88         //TODO: DeleteGlobalRef(job->job)
  89         delete job;
  90     }
  91 }
  92
  93 }
  94
  95 extern "C" JNIEXPORT jbyteArray JNICALL
  96 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_threadId(
  97     JNIEnv * env, SAL_UNUSED_PARAMETER jclass) SAL_THROW_EXTERN_C()
  98 {
  99     sal_Sequence * s = 0;
 100     uno_getIdOfCurrentThread(&s); //TODO: out of memory
 101     uno_releaseIdFromCurrentThread();
 102     rtl::ByteSequence seq(s);
 103     rtl_byte_sequence_release(s);
 104     sal_Int32 n = seq.getLength();
 105     jbyteArray a = env->NewByteArray(n);
 106         // sal_Int32 and jsize are compatible here
 107     if (a == 0) {
 108         return 0;
 109     }
 110     void * p = env->GetPrimitiveArrayCritical(a, 0);
 111     if (p == 0) {
 112         return 0;
 113     }
 114     rtl_copyMemory(p, seq.getConstArray(), n);
 115         // sal_Int8 and jbyte ought to be compatible
 116     env->ReleasePrimitiveArrayCritical(a, p, 0);
 117     return a;
 118 }
 119
 120 extern "C" JNIEXPORT jlong JNICALL
 121 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_create(
 122     JNIEnv * env, SAL_UNUSED_PARAMETER jclass) SAL_THROW_EXTERN_C()
 123 {
 124     JavaVM * vm;
 125     if (env->GetJavaVM(&vm) != JNI_OK) { //TODO: no Java exception raised?
 126         jclass c = env->FindClass("java/lang/RuntimeException");
 127         if (c != 0) {
 128             env->ThrowNew(c, "JNI GetJavaVM failed");
 129         }
 130         return 0;
 131     }
 132     jclass c = env->FindClass("com/sun/star/lib/uno/environments/remote/Job");
 133     if (c == 0) {
 134         return 0;
 135     }
 136     jmethodID execute = env->GetMethodID(c, "execute", "()Ljava/lang/Object;");
 137     if (execute == 0) {
 138         return 0;
 139     }
 140     try {
 141         return reinterpret_cast< jlong >(new Pool(
 142             new jvmaccess::VirtualMachine(vm, env->GetVersion(), false, env),
 143             execute, uno_threadpool_create()));
 144     } catch (const std::bad_alloc &) {
 145         throwOutOfMemory(env);
 146         return 0;
 147     }
 148 }
 149
 150 extern "C" JNIEXPORT void JNICALL
 151 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_attach(
 152     SAL_UNUSED_PARAMETER JNIEnv *, SAL_UNUSED_PARAMETER jclass, jlong pool)
 153     SAL_THROW_EXTERN_C()
 154 {
 155     uno_threadpool_attach(reinterpret_cast< Pool * >(pool)->pool);
 156 }
 157
 158 extern "C" JNIEXPORT jobject JNICALL
 159 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_enter(
 160     JNIEnv * env, SAL_UNUSED_PARAMETER jclass, jlong pool) SAL_THROW_EXTERN_C()
 161 {
 162     jobject job;
 163     uno_threadpool_enter(
 164         reinterpret_cast< Pool * >(pool)->pool,
 165         reinterpret_cast< void ** >(&job));
 166     if (job == 0) {
 167         return 0;
 168     }
 169     jobject ref = env->NewLocalRef(job);
 170     env->DeleteGlobalRef(job);
 171     return ref;
 172 }
 173
 174 extern "C" JNIEXPORT void JNICALL
 175 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_detach(
 176     SAL_UNUSED_PARAMETER JNIEnv *, SAL_UNUSED_PARAMETER jclass, jlong pool)
 177     SAL_THROW_EXTERN_C()
 178 {
 179     uno_threadpool_detach(reinterpret_cast< Pool * >(pool)->pool);
 180 }
 181
 182 extern "C" JNIEXPORT void JNICALL
 183 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_putJob(
 184     JNIEnv * env, SAL_UNUSED_PARAMETER jclass, jlong pool, jbyteArray threadId,
 185     jobject job, jboolean request, jboolean oneWay) SAL_THROW_EXTERN_C()
 186 {
 187     void * s = env->GetPrimitiveArrayCritical(threadId, 0);
 188     if (s == 0) {
 189         return;
 190     }
 191     rtl::ByteSequence seq(
 192         static_cast< sal_Int8 * >(s), env->GetArrayLength(threadId));
 193         // sal_Int8 and jbyte ought to be compatible; sal_Int32 and jsize are
 194         // compatible here
 195         //TODO: out of memory
 196     env->ReleasePrimitiveArrayCritical(threadId, s, JNI_ABORT);
 197     Pool * p = reinterpret_cast< Pool * >(pool);
 198     jobject ref = env->NewGlobalRef(job);
 199     if (ref == 0) {
 200         return;
 201     }
 202     Job * j = 0;
 203     if (request) {
 204         j = new(std::nothrow) Job(p, ref);
 205         if (j == 0) {
 206             env->DeleteGlobalRef(ref);
 207             throwOutOfMemory(env);
 208             return;
 209         }
 210     }
 211     uno_threadpool_putJob(
 212         p->pool, seq.getHandle(),
 213         request ? static_cast< void * >(j) : static_cast< void * >(ref),
 214         request ? executeRequest : 0, oneWay);
 215 }
 216
 217 extern "C" JNIEXPORT void JNICALL
 218 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_dispose(
 219     SAL_UNUSED_PARAMETER JNIEnv *, SAL_UNUSED_PARAMETER jclass, jlong pool)
 220     SAL_THROW_EXTERN_C()
 221 {
 222     uno_threadpool_dispose(reinterpret_cast< Pool * >(pool)->pool);
 223 }
 224
 225 extern "C" JNIEXPORT void JNICALL
 226 Java_com_sun_star_lib_uno_environments_remote_NativeThreadPool_destroy(
 227     SAL_UNUSED_PARAMETER JNIEnv *, SAL_UNUSED_PARAMETER jclass, jlong pool)
 228     SAL_THROW_EXTERN_C()
 229 {
 230     Pool * p = reinterpret_cast< Pool * >(pool);
 231     uno_threadpool_destroy(p->pool);
 232     delete p;
 233 }
 234
 235 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */