concurrent run will crash application

dsl.cc

@@ -56,6 +56,8 @@
 // For SVG handling
 #include <QtSvg/QSvgRenderer>
 
+#include <QtConcurrent>
+
 #include "utils.hh"
 
 namespace Dsl {
@@ -1561,6 +1563,7 @@ class DslArticleRequest: public Dictionary::DataRequest
 
   QAtomicInt isCancelled;
   QSemaphore hasExited;
+  QFuture< void > f;
 
 public:
 
@@ -1569,7 +1572,8 @@ public:
                      DslDictionary & dict_, bool ignoreDiacritics_ ):
     word( word_ ), alts( alts_ ), dict( dict_ ), ignoreDiacritics( ignoreDiacritics_ )
   {
-    QThreadPool::globalInstance()->start( [ this ]() { this->run(); } );
+    f = QtConcurrent::run( [ this ]() { this->run(); } );
+    // QThreadPool::globalInstance()->start( [ this ]() { this->run(); } );
   }
 
   void run();
@@ -1582,6 +1586,7 @@ public:
   ~DslArticleRequest()
   {
     isCancelled.ref();
+    f.waitForFinished();
     //hasExited.acquire();
   }
 };
@@ -1733,6 +1738,7 @@ class DslResourceRequest: public Dictionary::DataRequest
 
   QAtomicInt isCancelled;
   QSemaphore hasExited;
+  QFuture< void > f;
 
 public:
 
@@ -1741,7 +1747,8 @@ public:
     dict( dict_ ),
     resourceName( resourceName_ )
   {
-    QThreadPool::globalInstance()->start( [ this ]() { this->run(); } );
+    f = QtConcurrent::run( [ this ]() { this->run(); } );
+    // QThreadPool::globalInstance()->start( [ this ]() { this->run(); } );
   }
 
   void run();
@@ -1754,6 +1761,7 @@ public:
   ~DslResourceRequest()
   {
     isCancelled.ref();
+    f.waitForFinished();
     //hasExited.acquire();
   }
 };

epwing.cc

@@ -10,6 +10,7 @@
 #include <QSemaphore>
 
 #include <map>
+#include <QtConcurrent>
 #include <set>
 #include <string>
 
@@ -461,6 +462,7 @@ class EpwingArticleRequest: public Dictionary::DataRequest
 
   QAtomicInt isCancelled;
   QSemaphore hasExited;
+  QFuture< void > f;
 
 public:
 
@@ -469,8 +471,9 @@ public:
                         EpwingDictionary & dict_, bool ignoreDiacritics_ ):
     word( word_ ), alts( alts_ ), dict( dict_ ), ignoreDiacritics( ignoreDiacritics_ )
   {
-    QThreadPool::globalInstance()->start(
-      new EpwingArticleRequestRunnable( *this, hasExited ) );
+    f = QtConcurrent::run( [ this ]() { this->run(); } );
+    // QThreadPool::globalInstance()->start(
+    //   new EpwingArticleRequestRunnable( *this, hasExited ) );
   }
 
   void run(); // Run from another thread by EpwingArticleRequestRunnable
@@ -483,7 +486,8 @@ public:
   ~EpwingArticleRequest()
   {
     isCancelled.ref();
-    hasExited.acquire();
+    f.waitForFinished();
+    // hasExited.acquire();
   }
 };
 

ftshelpers.hh

@@ -10,6 +10,7 @@
 #include <QRunnable>
 #include <QSemaphore>
 #include <QList>
+#include <QtConcurrent>
 
 #include "dictionary.hh"
 #include "btreeidx.hh"
@@ -83,6 +84,7 @@ class FTSResultsRequest : public Dictionary::DataRequest
   QAtomicInt isCancelled;
 
   QAtomicInt results;
+  QFuture< void > f;
 
   QList< FTS::FtsHeadword > * foundHeadwords;
 
@@ -135,7 +137,8 @@ public:
 
     foundHeadwords = new QList< FTS::FtsHeadword >;
     results         = 0;
-    QThreadPool::globalInstance()->start( [ this ]() { this->run(); }, -100 );
+    f              = QtConcurrent::run( [ this ]() { this->run(); } );
+    // QThreadPool::globalInstance()->start( [ this ]() { this->run(); }, -100 );
   }
 
   void run();
@@ -148,6 +151,7 @@ public:
   ~FTSResultsRequest()
   {
     isCancelled.ref();
+    f.waitForFinished();
     if( foundHeadwords )
       delete foundHeadwords;
   }

mdx.cc

@@ -43,6 +43,7 @@
 #include "tiff.hh"
 #include "utils.hh"
 #include "base/globalregex.hh"
+#include <QtConcurrent>
 
 namespace Mdx
 {
@@ -533,6 +534,7 @@ class MdxArticleRequest: public Dictionary::DataRequest
 
   QAtomicInt isCancelled;
   QSemaphore hasExited;
+  QFuture< void > f;
 
 public:
 
@@ -545,7 +547,8 @@ public:
     dict( dict_ ),
     ignoreDiacritics( ignoreDiacritics_ )
   {
-    QThreadPool::globalInstance()->start( [ this ]() { this->run(); } );
+    f = QtConcurrent::run( [ this ]() { this->run(); } );
+    // QThreadPool::globalInstance()->start(  );
   }
 
   void run();
@@ -558,7 +561,8 @@ public:
   ~MdxArticleRequest()
   {
     isCancelled.ref();
-    //hasExited.acquire();
+    f.waitForFinished();
+    // hasExited.acquire();
   }
 };
 
@@ -687,6 +691,7 @@ class MddResourceRequest: public Dictionary::DataRequest
   wstring resourceName;
   QAtomicInt isCancelled;
   QSemaphore hasExited;
+  QFuture< void > f;
 
 public:
 
@@ -695,7 +700,8 @@ public:
     dict( dict_ ),
     resourceName( Utf8::decode( resourceName_ ) )
   {
-    QThreadPool::globalInstance()->start( [ this ]() { this->run(); } );
+    f = QtConcurrent::run( [ this ]() { this->run(); } );
+    // QThreadPool::globalInstance()->start( [ this ]() { this->run(); } );
   }
 
   void run();
@@ -708,6 +714,7 @@ public:
   ~MddResourceRequest()
   {
     isCancelled.ref();
+    f.waitForFinished();
     //hasExited.acquire();
   }
 };

zim.cc

@@ -41,6 +41,7 @@
 #include <set>
 #include <map>
 #include <algorithm>
+#include <QtConcurrent>
 
 namespace Zim {
 
@@ -1248,6 +1249,7 @@ class ZimArticleRequest: public Dictionary::DataRequest
 
   QAtomicInt isCancelled;
   QSemaphore hasExited;
+  QFuture< void > f;
 
 public:
 
@@ -1256,7 +1258,8 @@ public:
                      ZimDictionary & dict_, bool ignoreDiacritics_ ):
     word( word_ ), alts( alts_ ), dict( dict_ ), ignoreDiacritics( ignoreDiacritics_ )
   {
-    QThreadPool::globalInstance()->start( [ this ]() { this->run(); } );
+    f = QtConcurrent::run( [ this ]() { this->run(); } );
+    // QThreadPool::globalInstance()->start( [ this ]() { this->run(); } );
   }
 
   void run();
@@ -1269,6 +1272,7 @@ public:
   ~ZimArticleRequest()
   {
     isCancelled.ref();
+    f.waitForFinished();
     //hasExited.acquire();
   }
 };
@@ -1421,11 +1425,13 @@ class ZimResourceRequest: public Dictionary::DataRequest
 
   QAtomicInt isCancelled;
   QSemaphore hasExited;
+  QFuture< void > f;
 
 public:
   ZimResourceRequest(ZimDictionary &dict_, string const &resourceName_)
       : dict(dict_), resourceName(resourceName_) {
-    QThreadPool::globalInstance()->start( [ this ]() { this->run(); } );
+    f = QtConcurrent::run( [ this ]() { this->run(); } );
+    // QThreadPool::globalInstance()->start( [ this ]() { this->run(); } );
   }
 
   void run();
@@ -1438,6 +1444,7 @@ public:
   ~ZimResourceRequest()
   {
     isCancelled.ref();
+    f.waitForFinished();
     //hasExited.acquire();
   }
 };