rshen/c-capnproto
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Align capn_segment to 64-bit boundaries on MSVC

Browse source 
Unless capn_segment is defined with __declspec(align(64)),
check_segment_alignment fails to compile in x86 mode, as (sizeof(struct
capn_segment)&7) -> (44 & 7) evaluates to 4
Always compiles in x64 mode, as (sizeof(struct capn_segment)&7) -> (80 &
7) evaluates to 0
This commit is contained in:
Nathanael Jones 2016-05-11 10:30:41 -07:00
parent 8f37e0f618
commit 27df3d6064
2 changed files with 8 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

5
lib/capn-malloc.c
View file

@ -14,6 +14,11 @@
#include <limits.h>
#include <errno.h>
/* Visual Studio notes:
* Unless capn_segment is defined with __declspec(align(64)), check_segment_alignment
* Fails to compile in x86 mode, as (sizeof(struct capn_segment)&7) -> (44 & 7) evaluates to 4
* Compiles in x64 mode, as (sizeof(struct capn_segment)&7) -> (80 & 7) evaluates to 0
*/
struct check_segment_alignment {
unsigned int foo : (sizeof(struct capn_segment)&7) ? -1 : 1;
};