/******************************************************************//**
This function is used in the insert buffer to move the ownership of an
x-latch on a buffer frame to the current thread. The x-latch was set by
the buffer read operation and it protected the buffer frame while the
read was done. The ownership is moved because we want that the current
thread is able to acquire a second x-latch which is stored in an mtr.
This, in turn, is needed to pass the debug checks of index page
operations. */
UNIV_INTERN
void
rw_lock_x_lock_move_ownership(
/*==========================*/
rw_lock_t* lock) /*!< in: lock which was x-locked in the
buffer read */
{
ut_ad(rw_lock_is_locked(lock, RW_LOCK_EX));
rw_lock_set_writer_id_and_recursion_flag(lock, TRUE);
}
void
rw_lock_x_lock_move_ownership(
/*==========================*/
rw_lock_t* lock) /* in: lock which was x-locked in the
buffer read */
{
ut_ad(rw_lock_is_locked(lock, RW_LOCK_EX));
mutex_enter(&(lock->mutex));
lock->writer_thread = os_thread_get_curr_id();
lock->pass = 0;
mutex_exit(&(lock->mutex));
}
