Move make_cleanup_close to common code

This commit moves the function make_cleanup_close from gdb/utils.[ch]
to gdb/common/filestuff.[ch] to make it usable from common code.

gdb/ChangeLog:

	* utils.h (make_cleanup_close): Moved to common/filestuff.h.
	* utils.c (do_close_cleanup): Moved to common/filestuff.c.
	(make_cleanup_close): Likewise.
	* common/filestuff.h (make_cleanup_close): Moved from utils.h.
	* common/filestuff.c (do_close_cleanup): Moved from utils.c.
	(make_cleanup_close): Likewise.

2 files changed, 25 insertions, 0 deletions

diff --git a/gdb/common/filestuff.c b/gdb/common/filestuff.c
index 14d6324..25ea8fa 100644
--- a/gdb/common/filestuff.c
+++ b/gdb/common/filestuff.c
@@ -404,3 +404,24 @@ gdb_pipe_cloexec (int filedes[2])
 
   return result;
 }
+
+/* Helper function which does the work for make_cleanup_close.  */
+
+static void
+do_close_cleanup (void *arg)
+{
+  int *fd = arg;
+
+  close (*fd);
+}
+
+/* See cleanup-utils.h.  */
+
+struct cleanup *
+make_cleanup_close (int fd)
+{
+  int *saved_fd = xmalloc (sizeof (fd));
+
+  *saved_fd = fd;
+  return make_cleanup_dtor (do_close_cleanup, saved_fd, xfree);
+}
diff --git a/gdb/common/filestuff.h b/gdb/common/filestuff.h
index 98522a6..e997ecc 100644
--- a/gdb/common/filestuff.h
+++ b/gdb/common/filestuff.h
@@ -67,4 +67,8 @@ extern int gdb_socket_cloexec (int domain, int style, int protocol);
 
 extern int gdb_pipe_cloexec (int filedes[2]);
 
+/* Return a new cleanup that closes FD.  */
+
+extern struct cleanup *make_cleanup_close (int fd);
+
 #endif /* FILESTUFF_H */