--- cvsroot/libeio/eio.c	2008/07/11 10:54:50	1.22
+++ cvsroot/libeio/eio.c	2008/09/21 00:23:45	1.23
@@ -952,6 +952,35 @@
   req->result = res;
 }
 
+#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO)
+# define msync(a,b,c) ENOSYS
+#endif
+
+int
+eio__mtouch (void *mem, size_t len, int flags)
+{
+  intptr_t addr = (intptr_t)mem;
+  intptr_t end = addr + len;
+#ifdef PAGESIZE
+  const intptr_t page = PAGESIZE;
+#else
+  static intptr_t page;
+
+  if (!page)
+    page = sysconf (_SC_PAGESIZE);
+#endif
+
+  addr &= ~(page - 1); /* assume page size is always a power of two */
+
+  if (addr < end)
+    if (flags) /* modify */
+      do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len);
+    else
+      do { *((volatile sig_atomic_t *)addr)     ; } while ((addr += page) < len);
+
+  return 0;
+}
+
 /*****************************************************************************/
 
 #define ALLOC(len)				\
@@ -1126,6 +1155,8 @@
       case EIO_SYNC:      req->result = 0; sync (); break;
       case EIO_FSYNC:     req->result = fsync     (req->int1); break;
       case EIO_FDATASYNC: req->result = fdatasync (req->int1); break;
+      case EIO_MSYNC:     req->result = msync (req->ptr2, req->size, req->int1); break;
+      case EIO_MTOUCH:    req->result = eio__mtouch (req->ptr2, req->size, req->int1); break;
 
       case EIO_READDIR:   eio__scandir (req, self); break;
 
@@ -1174,7 +1205,7 @@
         break;
 
       case EIO_CUSTOM:
-        req->feed (req);
+        ((void (*)(eio_req *))req->feed) (req);
         break;
 
       default:
@@ -1207,6 +1238,16 @@
   REQ (EIO_FSYNC); req->int1 = fd; SEND;
 }
 
+eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
+{
+  REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
+}
+
+eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data)
+{
+  REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND;
+}
+
 eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data)
 {
   REQ (EIO_FDATASYNC); req->int1 = fd; SEND;
@@ -1371,7 +1412,7 @@
 
 eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data)
 {
-  REQ (EIO_CUSTOM); req->feed = execute; SEND;
+  REQ (EIO_CUSTOM); req->feed = (void (*)(eio_req *))execute; SEND;
 }
 
 #endif