From: Daniel Golle <daniel@makrotopia.org>
Date: Mon, 2 Nov 2020 16:43:02 +0000 (+0000)
Subject: libopkg: tighten length of fields in struct abstract_pkg
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=532f92debcc24fae94246f9a40ef8aca7547930c;p=project%2Fopkg-lede.git

libopkg: tighten length of fields in struct abstract_pkg

Should reduce the size of that struct and hence memory consumption
during dependency resolution (48 bytes vs. 56 bytes on 64-bit).

Suggested-by: Jo-Philipp Wich <jo@mein.io>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---

diff --git a/libopkg/pkg.h b/libopkg/pkg.h
index 600fc9e..4ce13ea 100644
--- a/libopkg/pkg.h
+++ b/libopkg/pkg.h
@@ -105,17 +105,17 @@ enum pkg_fields {
 
 struct abstract_pkg {
 	char *name;
-	int dependencies_checked;
 	pkg_vec_t *pkgs;
-	pkg_state_status_t state_status;
-	pkg_state_flag_t state_flag;
+	int dependencies_checked:1;
+	pkg_state_status_t state_status:4;
+	pkg_state_flag_t state_flag:11;
 
 	/* XXX: This should be abstract_pkg_vec_t for consistency. */
 	struct abstract_pkg **depended_upon_by;
 
 	abstract_pkg_vec_t *provided_by;
 	abstract_pkg_vec_t *replaced_by;
-};
+} __attribute__((__packed__)) ;
 
 #include "pkg_depends.h"