Introduce hard mode when we are OOM

Start killing documents when memory usage goes above threshold.

Also make it possible to close documents from admin instance.
In DocumentBroker::closeDocument, just set the _stop flag and wake
up the polling thread which will terminate the children, instead of
manually terminating the children.

Change-Id: Ie70e05b3fb6ea816a87b6dcfaed92cdddb94aa90

1 files changed, 21 insertions, 0 deletions

diff --git a/wsd/AdminModel.hpp b/wsd/AdminModel.hpp
index b217c2bea4..d56bdb7040 100644
--- a/wsd/AdminModel.hpp
+++ b/wsd/AdminModel.hpp
@@ -54,6 +54,22 @@ struct DocProcSettings
     size_t LimitFileSizeMb;
 };
 
+/// Containing basic information about document
+struct DocBasicInfo
+{
+    std::string _docKey;
+    std::time_t _idleTime;
+    bool _saved;
+    int _mem;
+
+    DocBasicInfo(const std::string& docKey, std::time_t idleTime, bool saved, int mem)
+        : _docKey(docKey),
+          _idleTime(idleTime),
+          _saved(saved),
+          _mem(mem)
+        { }
+};
+
 /// A document in Admin controller.
 class Document
 {
@@ -73,6 +89,8 @@ public:
     {
     }
 
+    const std::string getDocKey() const { return _docKey; }
+
     Poco::Process::PID getPid() const { return _pid; }
 
     std::string getFilename() const { return _filename; }
@@ -247,6 +265,9 @@ public:
     uint64_t getSentBytesTotal() { return _sentBytesTotal; }
     uint64_t getRecvBytesTotal() { return _recvBytesTotal; }
 
+    /// Document basic info list sorted by most idle time
+    std::list<DocBasicInfo> getDocumentsSortedByIdle() const;
+
 private:
     std::string getMemStats();