Dep/MySQL: Updated MySQL sources to version 5.5.9 (current GA)

dep/mysqllite/mysys/my_delete.c

@@ -36,8 +36,8 @@ int my_delete(const char *name, myf MyFlags)
   DBUG_RETURN(err);
 } /* my_delete */
 
-#if defined(__WIN__) && defined(__NT__)
-/*
+#if defined(__WIN__)
+/**
   Delete file which is possibly not closed.
 
   This function is intended to be used exclusively as a temporal solution
@@ -53,6 +53,20 @@ int my_delete(const char *name, myf MyFlags)
   renamed to <name>.<num>.deleted where <name> - the initial name of the
   file, <num> - a hexadecimal number chosen to make the temporal name to
   be unique.
+
+  @param the name of the being deleted file
+  @param the flags instructing how to react on an error internally in
+         the function
+
+  @note The per-thread @c my_errno holds additional info for a caller to
+        decide how critical the error can be.
+
+  @retval
+    0	ok
+  @retval
+    1   error
+
+
 */
 int nt_share_delete(const char *name, myf MyFlags)
 {
@@ -63,6 +77,7 @@ int nt_share_delete(const char *name, myf MyFlags)
 
   for (cnt= GetTickCount(); cnt; cnt--)
   {
+    errno= 0;
     sprintf(buf, "%s.%08X.deleted", name, cnt);
     if (MoveFile(name, buf))
       break;
@@ -79,14 +94,32 @@ int nt_share_delete(const char *name, myf MyFlags)
     break;
   }
 
-  if (DeleteFile(buf))
-    DBUG_RETURN(0);
+  if (errno == ERROR_FILE_NOT_FOUND)
+  {
+    my_errno= ENOENT;    // marking, that `name' doesn't exist 
+  }
+  else if (errno == 0)
+  {
+    if (DeleteFile(buf))
+      DBUG_RETURN(0);
+    /*
+      The below is more complicated than necessary. For some reason, the
+      assignment to my_errno clears the error number, which is retrieved
+      by GetLastError() (VC2005EE). Assigning to errno first, allows to
+      retrieve the correct value.
+    */
+    errno= GetLastError();
+    if (errno == 0)
+      my_errno= ENOENT; // marking, that `buf' doesn't exist
+    else
+      my_errno= errno;
+  }
+  else
+    my_errno= errno;
 
-  my_errno= GetLastError();
   if (MyFlags & (MY_FAE+MY_WME))
     my_error(EE_DELETE, MYF(ME_BELL + ME_WAITTANG + (MyFlags & ME_NOINPUT)),
-	       name, my_errno);
-
+             name, my_errno);
   DBUG_RETURN(-1);
 }
 #endif