.

wcfs/internal/wcfs_virtmem.cpp

@@ -28,6 +28,9 @@ using namespace golang;
 template<typename Key, typename Value>
 using dict = std::unordered_map<Key, Value>;
 
+#include <vector>
+using std::vector;
+
 #include <stdint.h>
 
 typedef uint64_t Tid;   // XXX ok?
@@ -40,6 +43,7 @@ struct IContext {
 
 struct Conn;
 struct _File;
+struct _Mapping;
 struct WatchLink;
 struct SrvReq;
 
@@ -72,10 +76,21 @@ private:
 //
 // XXX doc
 struct _File {
-    // XXX
+    Conn    *wconn;
+    Oid     foid;   // hex of ZBigFile root object ID
+    // .blksize      block size of this file
+    // .headf        file object of head/file
+    // .headfsize    head/file size is known to be at least headfsize (size ↑=)
+    dict<int64_t, Tid> pinned;  // {} blk -> rev   that wcfs already sent us for this file
+    vector<_Mapping*> mmaps;    // []_Mapping ↑blk_start    mappings of this file
 };
 
-// XXX struct Mapping
+// _Mapping represents one mapping of _File.
+struct _Mapping {
+    _File   *file;
+    int     blk_start;  // offset of this mapping in file
+    // .mem          mmaped memory
+};
 
 
 // XXX struct WatchLink
@@ -150,5 +165,7 @@ void Conn::_pin1(SrvReq *req) {
 
     _File *f = _->second;
 
+    // XXX relock wconn -> f ?
+
     wconn->_filemu.unlock();
 }