s currently executing then this will return NULL.</p>

<p>If executing within the context of a job (i.e. having been called directly or indirectly by the function &quot;func&quot; passed as an argument to ASYNC_start_job()) then ASYNC_pause_job() will immediately return control to the calling application with <b>ASYNC_PAUSE</b> returned from the ASYNC_start_job() call. A subsequent call to ASYNC_start_job passing in the relevant <b>ASYNC_JOB</b> in the <i>*job</i> parameter will resume execution from the AS