MemoryMappedFile::getTotalMapped

1 files changed, 9 insertions, 0 deletions

diff --git a/util/mmap.cpp b/util/mmap.cpp
index 5c571cc87a7..7d6b1d0b558 100644
--- a/util/mmap.cpp
+++ b/util/mmap.cpp
@@ -49,6 +49,15 @@ namespace mongo {
         --closingAllFiles;
     }
 
+    long long MemoryMappedFile::totalMappedLength(){
+        unsigned long long total = 0;
+        
+        for ( set<MemoryMappedFile*>::iterator i = mmfiles.begin(); i != mmfiles.end(); i++ )
+            total += (*i)->length();
+
+        return total;
+    }
+
     void MemoryMappedFile::updateLength( const char *filename, long &length ) {
         if ( !boost::filesystem::exists( filename ) )
             return;