diff options
Diffstat (limited to 'git-compat-util.h')
| -rw-r--r-- | git-compat-util.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/git-compat-util.h b/git-compat-util.h index d210cff058..00356476a9 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -1271,6 +1271,30 @@ __attribute__((format (printf, 1, 2))) NORETURN void BUG(const char *fmt, ...); #endif +#ifdef __APPLE__ +#define FSYNC_METHOD_DEFAULT FSYNC_METHOD_WRITEOUT_ONLY +#else +#define FSYNC_METHOD_DEFAULT FSYNC_METHOD_FSYNC +#endif + +enum fsync_action { + FSYNC_WRITEOUT_ONLY, + FSYNC_HARDWARE_FLUSH +}; + +/* + * Issues an fsync against the specified file according to the specified mode. + * + * FSYNC_WRITEOUT_ONLY attempts to use interfaces available on some operating + * systems to flush the OS cache without issuing a flush command to the storage + * controller. If those interfaces are unavailable, the function fails with + * ENOSYS. + * + * FSYNC_HARDWARE_FLUSH does an OS writeout and hardware flush to ensure that + * changes are durable. It is not expected to fail. + */ +int git_fsync(int fd, enum fsync_action action); + /* * Preserves errno, prints a message, but gives no warning for ENOENT. * Returns 0 on success, which includes trying to unlink an object that does |