.

setup.py

@@ -233,7 +233,12 @@ setup(
                     _bigfile,
 
                     PyGoExt('wcfs.internal._wcfs',
-                        ['wcfs/internal/_wcfs.pyx', 'wcfs/internal/wcfs_virtmem.cpp']),
+                        ['wcfs/internal/_wcfs.pyx', 'wcfs/internal/wcfs_virtmem.cpp'],
+                        include_dirs = [    # XXX -> common place
+                            './include',
+                            './3rdparty/ccan',
+                            './3rdparty/include'
+                        ]),
 
                     PyGoExt('wcfs.internal.wcfs_test',
                         ['wcfs/internal/wcfs_test.pyx']),

wcfs/internal/wcfs_virtmem.cpp

@@ -24,15 +24,17 @@
 #include <golang/libgolang.h>
 using namespace golang;
 
+#include <wendelin/bug.h>
+
 #include <unordered_map>
+#include <vector>
+#include <stdint.h>
+
 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?
 typedef uint64_t Oid;   // XXX ok?
 
@@ -77,8 +79,8 @@ private:
 // XXX doc
 struct _File {
     Conn    *wconn;
-    Oid     foid;   // hex of ZBigFile root object ID
-    // .blksize      block size of this file
+    Oid     foid;       // hex of ZBigFile root object ID
+    int64_t 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
@@ -89,7 +91,13 @@ struct _File {
 struct _Mapping {
     _File   *file;
     int     blk_start;  // offset of this mapping in file
-    // .mem          mmaped memory
+    uint8_t *mem_start; // mmapped memory [mem_start, mem_stop)
+    uint8_t *mem_stop;
+
+    int64_t blk_stop() const {
+        ASSERT((mem_stop - mem_start) % file->blksize == 0);
+        return blk_start + (mem_stop - mem_start) / file->blksize;
+    }
 };
 
 
@@ -167,5 +175,10 @@ void Conn::_pin1(SrvReq *req) {
 
     // XXX relock wconn -> f ?
 
+    for (auto mmap : f->mmaps) {    // XXX use ↑blk_start for binary search
+        if (!(mmap->blk_start <= req->blk && req->blk < mmap->blk_stop()))
+            continue;   // blk ∉ mmap
+    }
+
     wconn->_filemu.unlock();
 }