src/exceptionmanager.h

   1 /*
   2         Author: Marco Costalba (C) 2005-2007
   3
   4         Copyright: See COPYING file that comes with this distribution
   5
   6 */
   7 #ifndef EXCEPTIONMANAGER_H
   8 #define EXCEPTIONMANAGER_H
   9
  10 #include <QVector>
  11 #include <QString>
  12 #include <QMap>
  13
  14 // exception manager sugar macro
  15 #define EM_DECLARE(x)    int x
  16 #define EM_INIT(x,y)     ExceptionManager::em()->init(&x, QString(y))
  17 #define EM_REGISTER(x)   ExceptionManager::em()->add(x, true)
  18 #define EM_REGISTER_Q(x) ExceptionManager::em()->add(x, false)
  19 #define EM_REMOVE(x)     ExceptionManager::em()->remove(x)
  20 #define EM_RAISE(x)      ExceptionManager::em()->raise(x)
  21 #define EM_MATCH(x,y,z)  ExceptionManager::em()->isMatch(x,y,QString(z))
  22 #define EM_DESC(x)       ExceptionManager::em()->desc(x)
  23 #define EM_IS_PENDING(x) ExceptionManager::em()->isPending(x)
  24 #define EM_THROW_PENDING ExceptionManager::em()->throwPending()
  25
  26 #define EM_BEFORE_PROCESS_EVENTS int _region = ExceptionManager::em()->saveThrowableSet()
  27
  28 #define EM_AFTER_PROCESS_EVENTS ExceptionManager::em()->restoreThrowableSet(_region); \
  29                                 ExceptionManager::em()->throwPending()
  30
  31 #define EM_PROCESS_EVENTS do { EM_BEFORE_PROCESS_EVENTS; \
  32                                qApp->processEvents();    \
  33                                EM_AFTER_PROCESS_EVENTS;  \
  34                           } while (false)
  35
  36 #define EM_PROCESS_EVENTS_NO_INPUT do { EM_BEFORE_PROCESS_EVENTS;                                \
  37                                         qApp->processEvents(QEventLoop::ExcludeUserInputEvents); \
  38                                         EM_AFTER_PROCESS_EVENTS;                                 \
  39                                    } while (false)
  40
  41 class ExceptionManager { // singleton class
  42 protected:
  43         ExceptionManager();
  44         ExceptionManager(const ExceptionManager&);
  45         ExceptionManager& operator=(const ExceptionManager&);
  46
  47 public:
  48         static ExceptionManager* em() {
  49                 static ExceptionManager private_em;
  50                 return &private_em;
  51         }
  52         void init(int* excpId, const QString& desc);
  53         void add(int excpId, bool verbose);
  54         void remove(int excpId);
  55         void raise(int excpId);
  56         void throwPending();
  57         int saveThrowableSet();
  58         void restoreThrowableSet(int regionId);
  59         bool isMatch(int value, int excpId, const QString& context);
  60         const QString desc(int excpId);
  61         bool isPending(int excpId);
  62
  63 private:
  64         int excpId;
  65         int regionId;
  66         int currentRegionId;
  67
  68         class Exception {
  69         public:
  70                 Exception() {}
  71                 Exception(int ex, bool v) : excpId(ex), verbose(v), isRaised(false) {}
  72                 int excpId;
  73                 bool verbose;
  74                 bool isRaised;
  75         };
  76         typedef QList<Exception> ThrowableSet;
  77         typedef ThrowableSet::iterator SetIt;
  78         QMap<int, ThrowableSet> throwableSetMap;
  79         ThrowableSet totalThrowableSet;
  80         ThrowableSet regionThrowableSet;
  81         QVector<QString> descriptions;
  82
  83         SetIt findExcp(ThrowableSet& ts, const SetIt& startIt, int excpId);
  84         void setRaisedFlag(ThrowableSet& ts, int excpId);
  85 };
  86
  87 #endif