Cygwin: move get_obj_handle_count() to miscfuncs.cc

get_obj_handle_count() is used in flock only so far, but pipe
handling might have a usage, too, soon.  Given that this function
might be generally useful and isn't restricted to flock usage,
move it to miscfuncs.cc and make it non-static.  Add a prototype
in miscfuncs.h.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/cygwin/flock.cc

@@ -216,22 +216,6 @@ allow_others_to_sync ()
   done = true;
 }
 
-/* Get the handle count of an object. */
-static ULONG
-get_obj_handle_count (HANDLE h)
-{
-  OBJECT_BASIC_INFORMATION obi;
-  NTSTATUS status;
-  ULONG hdl_cnt = 0;
-
-  status = NtQueryObject (h, ObjectBasicInformation, &obi, sizeof obi, NULL);
-  if (!NT_SUCCESS (status))
-    debug_printf ("NtQueryObject: %y", status);
-  else
-    hdl_cnt = obi.HandleCount;
-  return hdl_cnt;
-}
-
 /* Helper struct to construct a local OBJECT_ATTRIBUTES on the stack. */
 struct lockfattr_t
 {

winsup/cygwin/miscfuncs.cc

@@ -18,6 +18,22 @@ details. */
 #include "tls_pbuf.h"
 #include "mmap_alloc.h"
 
+/* Get handle count of an object. */
+ULONG
+get_obj_handle_count (HANDLE h)
+{
+  OBJECT_BASIC_INFORMATION obi;
+  NTSTATUS status;
+  ULONG hdl_cnt = 0;
+
+  status = NtQueryObject (h, ObjectBasicInformation, &obi, sizeof obi, NULL);
+  if (!NT_SUCCESS (status))
+    debug_printf ("NtQueryObject: %y", status);
+  else
+    hdl_cnt = obi.HandleCount;
+  return hdl_cnt;
+}
+
 int __reg2
 check_invalid_virtual_addr (const void *s, unsigned sz)
 {

winsup/cygwin/miscfuncs.h

@@ -98,6 +98,9 @@ transform_chars (PUNICODE_STRING upath, USHORT start_idx)
 
 PWCHAR transform_chars_af_unix (PWCHAR, const char *, __socklen_t);
 
+/* Get handle count of an object. */
+ULONG get_obj_handle_count (HANDLE h);
+
 /* Memory checking */
 int __reg2 check_invalid_virtual_addr (const void *s, unsigned sz);