Changeset 3184 for trunk/src/lib/nt/kFsCache.h

Timestamp:

Mar 23, 2018, 11:36:43 PM (7 years ago)

Author:

bird

Message:

kFsCache,dir-nt-bird: Added locking to the cache to make it accessible from winchildren worker threads.

File:

• trunk/src/lib/nt/kFsCache.h (modified) (3 diffs)

trunk/src/lib/nt/kFsCache.h

@@ -55 +55 @@
 /** The max UTF-16 name length. */
 #define KFSCACHE_CFG_MAX_UTF16_NAME         (256*2 + 16)
+/** Enables locking of the cache and thereby making it thread safe. */
+#define KFSCACHE_CFG_LOCKING                1
 
 
@@ -372 +374 @@
     PKFSOBJ             pFsObj;
 } KFSHASHW;
+#endif
+
+
+/** @def KFSCACHE_LOCK
+ *  Locks the cache exclusively. */
+/** @def KFSCACHE_UNLOCK
+ *  Counterpart to KFSCACHE_LOCK. */
+#ifdef KFSCACHE_CFG_LOCKING
+# define KFSCACHE_LOCK(a_pCache)        EnterCriticalSection(&(a_pCache)->u.CritSect)
+# define KFSCACHE_UNLOCK(a_pCache)      LeaveCriticalSection(&(a_pCache)->u.CritSect)
+#else
+# define KFSCACHE_LOCK(a_pCache)        do { } while (0)
+# define KFSCACHE_UNLOCK(a_pCache)      do { } while (0)
 #endif
 
@@ -440 +455 @@
     KFSDIR              RootDir;
 
+#ifdef KFSCACHE_CFG_LOCKING
+    /** Critical section protecting the cache. */
+    union
+    {
+# ifdef _WINBASE_
+        CRITICAL_SECTION    CritSect;
+# endif
+        KU64                abPadding[2 * 4 + 4 * sizeof(void *)];
+    } u;
+#endif
+
     /** File system hash table for ANSI filename strings. */
     PKFSHASHA           apAnsiPaths[KFSCACHE_CFG_PATH_HASH_TAB_SIZE];