[PATCH] pack internal structs for 64-bit systems

[PATCH] pack internal structs for 64-bit systems

[Eric Wong]

This reduces stack usage in some places, perhaps providing a
miniscule improvement in GC performance.

struct          before  after   difference
splice_args	48	40	8
vmsplice_args	32	24	8
---
 ext/io_splice/io_splice_ext.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ext/io_splice/io_splice_ext.c b/ext/io_splice/io_splice_ext.c
index 2e2caec..276f3a6 100644
--- a/ext/io_splice/io_splice_ext.c
+++ b/ext/io_splice/io_splice_ext.c
@@ -125,8 +125,8 @@ static void * WITHOUT_GVL(rb_blocking_function_t *func, void *data1,
 
 struct splice_args {
 	int fd_in;
-	off_t *off_in;
 	int fd_out;
+	off_t *off_in;
 	off_t *off_out;
 	size_t len;
 	unsigned flags;
@@ -402,9 +402,9 @@ static VALUE trytee(int argc, VALUE *argv, VALUE self)
 
 struct vmsplice_args {
 	int fd;
+	unsigned flags;
 	struct iovec *iov;
 	unsigned long nr_segs;
-	unsigned flags;
 };
 
 static void * nogvl_vmsplice(void *ptr)
-- 
EW