Make WordPress Core

Changeset 32580


Ignore:
Timestamp:
05/24/2015 05:25:52 PM (9 years ago)
Author:
DrewAPicture
Message:

Improve inline documentation for the cron lock behavior.

Props ericlewis.
Fixes #32478.

Location:
trunk/src
Files:
2 edited

Legend:

Unmodified
Added
Removed
  • trunk/src/wp-cron.php

    r31804 r32580  
    6565    die();
    6666
    67 $doing_cron_transient = get_transient( 'doing_cron');
     67
     68// The cron lock: a unix timestamp from when the cron was spawned.
     69$doing_cron_transient = get_transient( 'doing_cron' );
    6870
    6971// Use global $doing_wp_cron lock otherwise use the GET lock. If no lock, trying grabbing a new lock.
     
    8082}
    8183
    82 // Check lock
     84/*
     85 * The cron lock (a unix timestamp set when the cron was spawned),
     86 * must match $doing_wp_cron (the "key").
     87 */
    8388if ( $doing_cron_transient != $doing_wp_cron )
    8489    return;
  • trunk/src/wp-includes/cron.php

    r32116 r32580  
    226226
    227227    /*
    228     * multiple processes on multiple web servers can run this code concurrently
    229     * try to make this as atomic as possible by setting doing_cron switch
    230     */
     228     * Get the cron lock, which is a unix timestamp of when the last cron was spawned
     229     * and has not finished running.
     230     *
     231     * Multiple processes on multiple web servers can run this code concurrently,
     232     * this lock attempts to make spawning as atomic as possible.
     233     */
    231234    $lock = get_transient('doing_cron');
    232235
     
    267270    }
    268271
     272    // Set the cron lock with the current unix timestamp, when the cron is being spawned.
    269273    $doing_wp_cron = sprintf( '%.22F', $gmt_time );
    270274    set_transient( 'doing_cron', $doing_wp_cron );
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