mdb_env_get_fd function

int mdb_env_get_fd(
  1. Pointer<MDB_env> env,
  2. Pointer<mdb_filehandle_t> fd
)

@brief Return the filedescriptor for the given environment.

This function may be called after fork(), so the descriptor can be closed before exec*(). Other LMDB file descriptors have FD_CLOEXEC. (Until LMDB 0.9.18, only the lockfile had that.)

@paramin env An environment handle returned by #mdb_env_create() @paramout fd Address of a mdb_filehandle_t to contain the descriptor. @return A non-zero error value on failure and 0 on success. Some possible errors are:

  • EINVAL - an invalid parameter was specified.

Implementation

@ffi.FfiNative<
    ffi.Int Function(
        ffi.Pointer<MDB_env>, ffi.Pointer<mdb_filehandle_t>)>('mdb_env_get_fd')
external int mdb_env_get_fd(
  ffi.Pointer<MDB_env> env,
  ffi.Pointer<mdb_filehandle_t> fd,
);