diff options
Diffstat (limited to 'src/include/storage/fd.h')
| -rw-r--r-- | src/include/storage/fd.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/include/storage/fd.h b/src/include/storage/fd.h index 5b3c280dd7..2d843eb992 100644 --- a/src/include/storage/fd.h +++ b/src/include/storage/fd.h @@ -80,6 +80,22 @@ extern int max_safe_fds; #endif /* + * O_DIRECT is not standard, but almost every Unix has it. We translate it + * to the appropriate Windows flag in src/port/open.c. We simulate it with + * fcntl(F_NOCACHE) on macOS inside fd.c's open() wrapper. We use the name + * PG_O_DIRECT rather than defining O_DIRECT in that case (probably not a good + * idea on a Unix). + */ +#if defined(O_DIRECT) +#define PG_O_DIRECT O_DIRECT +#elif defined(F_NOCACHE) +#define PG_O_DIRECT 0x80000000 +#define PG_O_DIRECT_USE_F_NOCACHE +#else +#define PG_O_DIRECT 0 +#endif + +/* * prototypes for functions in fd.c */ |