assert_write_locked_by
assert_write_locked_by(&flock_fileA, -1);
assert_write_locked_by(&flock_fileA, -1);
static void assert_write_locked_by(lockinfo_t *, pid_t);
assert_write_locked_by(lock1, styleA == LSTYLE_POSIX ? pidA : -1);
assert_write_locked_by(lock1, styleB == LSTYLE_POSIX ? pidB : -1);
assert_write_locked_by(&flock_fileA, -1);