+ /** \brief Represents an active action group.
+ *
+ * An action group is a group of actions that are currently being
+ * performed. While an active group is active, certain routine
+ * clean-up actions that would normally be performed after every
+ * cache operation are delayed until the action group is
+ * completed. This is necessary primarily to avoid inefficiencies
+ * when modifying a large number of packages at once.
+ *
+ * This class represents an active action group. Creating an
+ * instance will create an action group; destroying one will
+ * destroy the corresponding action group.
+ *
+ * The following operations are suppressed by this class:
+ *
+ * - Keeping the Marked and Garbage flags up to date.
+ *
+ * \note This can be used in the future to easily accumulate
+ * atomic actions for undo or to display "what apt did anyway";
+ * e.g., change the counter of how many action groups are active
+ * to a std::set of pointers to them and use those to store
+ * information about what happened in a group in the group.
+ */
+ class ActionGroup
+ {
+ pkgDepCache &cache;
+
+ bool released;
+
+ /** Action groups are noncopyable. */
+ ActionGroup(const ActionGroup &other);
+ public:
+ /** \brief Create a new ActionGroup.
+ *
+ * \param cache The cache that this ActionGroup should
+ * manipulate.
+ *
+ * As long as this object exists, no automatic cleanup
+ * operations will be undertaken.
+ */
+ ActionGroup(pkgDepCache &cache);
+
+ /** \brief Clean up the action group before it is destroyed.
+ *
+ * If it is destroyed later, no second cleanup wil be run.
+ */
+ void release();
+
+ /** \brief Destroy the action group.
+ *
+ * If this is the last action group, the automatic cache
+ * cleanup operations will be undertaken.
+ */
+ ~ActionGroup();
+ };
+
+ /** \brief Returns \b true for packages matching a regular
+ * expression in APT::NeverAutoRemove.
+ */
+ class DefaultRootSetFunc : public InRootSetFunc
+ {
+ std::vector<regex_t *> rootSetRegexp;
+ bool constructedSuccessfully;
+
+ public:
+ DefaultRootSetFunc();
+ ~DefaultRootSetFunc();
+
+ /** \return \b true if the class initialized successfully, \b
+ * false otherwise. Used to avoid throwing an exception, since
+ * APT classes generally don't.
+ */
+ bool wasConstructedSuccessfully() const { return constructedSuccessfully; }
+
+ bool InRootSet(const pkgCache::PkgIterator &pkg);
+ };
+
projects / apt.git / blobdiff