1 files changed, 74 insertions, 0 deletions
diff --git a/lib/parallel_scan.h b/lib/parallel_scan.h
new file mode 100644
index 00000000..99424b2a
--- /dev/null
+++ b/lib/parallel_scan.h
@@ -0,0 +1,74 @@
+// **************************************************************************
+// * This file is part of the FreeFileSync project. It is distributed under *
+// * GNU General Public License: http://www.gnu.org/licenses/gpl.html       *
+// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de)                    *
+// **************************************************************************
+
+#ifndef PARALLEL_SCAN_H_INCLUDED
+#define PARALLEL_SCAN_H_INCLUDED
+
+#include <map>
+#include <set>
+#include "hard_filter.h"
+#include "../structures.h"
+#include "../file_hierarchy.h"
+
+namespace zen
+{
+struct DirectoryKey
+{
+    DirectoryKey(const Zstring& dirnameFull,
+                 const HardFilter::FilterRef& filter,
+                 SymLinkHandling handleSymlinks) :
+        dirnameFull_(dirnameFull),
+        filter_(filter),
+        handleSymlinks_(handleSymlinks) {}
+
+    Zstring dirnameFull_;
+    HardFilter::FilterRef filter_; //filter interface: always bound by design!
+    SymLinkHandling handleSymlinks_;
+};
+
+inline
+bool operator<(const DirectoryKey& lhs, const DirectoryKey& rhs)
+{
+    if (lhs.handleSymlinks_ != rhs.handleSymlinks_)
+        return lhs.handleSymlinks_ < rhs.handleSymlinks_;
+
+    if (!EqualFilename()(lhs.dirnameFull_, rhs.dirnameFull_))
+        return LessFilename()(lhs.dirnameFull_, rhs.dirnameFull_);
+
+    return *lhs.filter_ < *rhs.filter_;
+}
+
+
+struct DirectoryValue
+{
+    DirContainer dirCont;
+    std::set<Zstring> failedReads; //relative postfixed names of directories that could not be read (empty string for root), e.g. access denied, or temporal network drop
+};
+
+
+class FillBufferCallback
+{
+public:
+    virtual ~FillBufferCallback() {}
+
+    enum HandleError
+    {
+        TRAV_ERROR_RETRY,
+        TRAV_ERROR_IGNORE
+    };
+    virtual HandleError reportError (const std::wstring& errorText) = 0;               //may throw!
+    virtual void        reportStatus(const std::wstring& statusMsg, int itemTotal) = 0; //
+};
+
+//attention: ensure directory filtering is applied later to exclude filtered directories which have been kept as parent folders
+
+void fillBuffer(const std::set<DirectoryKey>& keysToRead, //in
+                std::map<DirectoryKey, DirectoryValue>& buf, //out
+                FillBufferCallback& callback,
+                size_t updateInterval); //unit: [ms]
+}
+
+#endif // PARALLEL_SCAN_H_INCLUDED