[binutils-gdb] gdb: add gdbarch_up

[Simon Marchi <simark@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=d246d904adf3e338c731c123219a8246281002e2

commit d246d904adf3e338c731c123219a8246281002e2
Author: Simon Marchi <simon.marchi@efficios.com>
Date:   Mon Oct 3 12:56:30 2022 -0400

    gdb: add gdbarch_up
    
    Add a gdbarch_up unique pointer type, that calls gdbarch_free on
    deletion.  This is used in the ROCm support patch at the end of this
    series.
    
    Change-Id: I4b808892d35d69a590ce83180f41afd91705b2c8
    Approved-By: Andrew Burgess <aburgess@redhat.com>

Diff:
---
 gdb/gdbarch.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h
index f4efd8c0bc7..f0399c2fa88 100644
--- a/gdb/gdbarch.h
+++ b/gdb/gdbarch.h
@@ -306,6 +306,14 @@ extern struct gdbarch *gdbarch_alloc (const struct gdbarch_info *info,
 
 extern void gdbarch_free (struct gdbarch *);
 
+struct gdbarch_deleter
+{
+  void operator() (gdbarch *arch) const
+  { gdbarch_free (arch); }
+};
+
+using gdbarch_up = std::unique_ptr<gdbarch, gdbarch_deleter>;
+
 /* Get the obstack owned by ARCH.  */
 
 extern obstack *gdbarch_obstack (gdbarch *arch);