# PR_JoinJob Blocks the current thread until a job has completed. ## Syntax ```{code} #include NSPR_API(PRStatus) PR_JoinJob(PRJob *job); ``` ### Parameter The function has the following parameter: `job` : A pointer to a {ref}`PRJob` structure returned by a {ref}`PR_QueueJob` function representing the job to be cancelled. ### Returns {ref}`PRStatus`