| /* |
| * 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 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include "apr_thread_proc.h" |
| #include "apr_thread_mutex.h" |
| #include "apr_thread_cond.h" |
| template <class _Annotator> |
| class ThreadAnnotator : public uima::Annotator { |
| _Annotator *child; |
| apr_pool_t * threadPool; |
| apr_thread_t * my_thread; |
| apr_thread_cond_t *batton4P; |
| apr_thread_cond_t *batton4C; |
| apr_thread_mutex_t *mutex; |
| |
| /* all of these are not thread safe - parent must sleep when child runs |
| and vice versa */ |
| uima::AnnotatorContext *_ac; |
| uima::CAS *_cas; |
| uima::ResultSpecification const *_rs; |
| uima::TypeSystem const *_ts; |
| uima::TyErrorId ret; |
| bool threadReady; |
| |
| enum method { |
| NOP, INITIALIZE, RECONFIGURE, DESTROY, TYPESYSTEMINIT, |
| PROCESS, DESTRUCTOR, BATCHPROCESSCOMPLETE, COLLECTIONPROCESSCOMPLETE |
| }; |
| method signal; |
| |
| /* note that the parent object must be suspended when this wakes up */ |
| static void *APR_THREAD_FUNC threadfunc(apr_thread_t* this_thread, void *p) { |
| ThreadAnnotator<_Annotator> *parent = |
| static_cast<ThreadAnnotator<_Annotator> *>(p); |
| parent->threadReady = true; |
| while (true) { |
| apr_thread_cond_wait(parent->batton4C, parent->mutex); |
| apr_thread_mutex_unlock(parent->mutex); |
| |
| switch (parent->signal) { |
| case INITIALIZE: |
| parent->ret = |
| parent->child->initialize(*parent->_ac); |
| break; |
| case RECONFIGURE: |
| parent->ret = |
| parent->child->reconfigure(); |
| break; |
| case DESTROY: |
| parent->ret = |
| parent->child->destroy(); |
| apr_thread_cond_signal(parent->batton4P); |
| apr_thread_exit(this_thread, APR_SUCCESS); |
| case BATCHPROCESSCOMPLETE: |
| parent->ret = |
| parent->child->batchProcessComplete(); |
| break; |
| case COLLECTIONPROCESSCOMPLETE: |
| parent->ret = |
| parent->child->collectionProcessComplete(); |
| break; |
| case TYPESYSTEMINIT: |
| parent->ret = |
| parent->child->typeSystemInit(*parent->_ts); |
| break; |
| case PROCESS: |
| parent->ret = |
| parent->child->process(*parent->_cas, *parent->_rs); |
| break; |
| case NOP: |
| case DESTRUCTOR: |
| // worker thread should never be here! |
| break; |
| } |
| apr_thread_mutex_lock(parent->mutex); |
| apr_thread_cond_signal(parent->batton4P); |
| } |
| return p; |
| } |
| |
| void execThread() { |
| apr_thread_mutex_lock(mutex); |
| apr_thread_cond_signal(batton4C); |
| apr_thread_cond_wait(batton4P, mutex); |
| apr_thread_mutex_unlock(mutex); |
| } |
| |
| public: |
| ThreadAnnotator() : child( new _Annotator() ), signal(NOP) { |
| apr_status_t rv = apr_initialize(); |
| rv = apr_initialize(); |
| rv += atexit(apr_terminate); |
| rv += apr_pool_create(&threadPool, NULL); |
| rv += apr_thread_mutex_create(&mutex, APR_THREAD_MUTEX_UNNESTED, threadPool); |
| rv += apr_thread_cond_create(&batton4P, threadPool); |
| rv += apr_thread_cond_create(&batton4C, threadPool); |
| |
| threadReady = false; |
| rv = apr_thread_create(&my_thread, NULL, threadfunc, |
| static_cast<void *>( this), threadPool); |
| |
| // wait for worker thread to be ready |
| apr_sleep(1000); |
| apr_thread_mutex_lock(mutex); |
| if (!threadReady) { |
| std::cerr << "WARNING: ThreadAnnotator worker thread not ready! " << std::endl; |
| } |
| apr_thread_mutex_unlock(mutex); |
| } |
| ~ThreadAnnotator() { |
| delete child; |
| } |
| uima::TyErrorId initialize(uima::AnnotatorContext &ac) { |
| _ac = ∾ |
| signal = INITIALIZE; |
| execThread(); |
| return ret; |
| } |
| uima::TyErrorId typeSystemInit(uima::TypeSystem const &ts) { |
| _ts = &ts; |
| signal = TYPESYSTEMINIT; |
| execThread(); |
| return ret; |
| } |
| uima::TyErrorId process(uima::CAS &cas, uima::ResultSpecification const &rs) { |
| _cas = &cas; |
| _rs = &rs; |
| signal = PROCESS; |
| execThread(); |
| return ret; |
| } |
| uima::TyErrorId reconfigure() { |
| signal = RECONFIGURE; |
| execThread(); |
| return ret; |
| } |
| uima::TyErrorId batchProcessComplete() { |
| signal = BATCHPROCESSCOMPLETE; |
| execThread(); |
| return ret; |
| } |
| uima::TyErrorId collectionProcessComplete() { |
| signal = COLLECTIONPROCESSCOMPLETE; |
| execThread(); |
| return ret; |
| } |
| uima::TyErrorId destroy() { |
| signal = DESTROY; |
| execThread(); |
| apr_status_t status; |
| apr_thread_join(&status, my_thread); |
| apr_thread_cond_destroy(batton4P); |
| apr_thread_cond_destroy(batton4C); |
| apr_thread_mutex_destroy(mutex); |
| return ret; |
| } |
| }; |
| |