bridges/source/jni_uno/nativethreadpool.cxx

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