Function sentinelScheduleScriptExecution

app/redis-6.2.6/src/sentinel.c:779–823

#define SENTINEL_SCRIPT_MAX_ARGS 16
void sentinelScheduleScriptExecution(char *path, ...) {
    va_list ap;
    char *argv[SENTINEL_SCRIPT_MAX_ARGS+1];
    int argc = 1;
    sentinelScriptJob *sj;

    va_start(ap, path);
    while(argc < SENTINEL_SCRIPT_MAX_ARGS) {
        argv[argc] = va_arg(ap,char*);
        if (!argv[argc]) break;
        argv[argc] = sdsnew(argv[argc]); /* Copy the string. */
        argc++;
    }
    va_end(ap);
    argv[0] = sdsnew(path);

    sj = zmalloc(sizeof(*sj));
    sj->flags = SENTINEL_SCRIPT_NONE;
    sj->retry_num = 0;
    sj->argv = zmalloc(sizeof(char*)*(argc+1));
    sj->start_time = 0;
    sj->pid = 0;
    memcpy(sj->argv,argv,sizeof(char*)*(argc+1));

    listAddNodeTail(sentinel.scripts_queue,sj);

    /* Remove the oldest non running script if we already hit the limit. */
    if (listLength(sentinel.scripts_queue) > SENTINEL_SCRIPT_MAX_QUEUE) {
        listNode *ln;
        listIter li;

        listRewind(sentinel.scripts_queue,&li);
        while ((ln = listNext(&li)) != NULL) {
            sj = ln->value;

            if (sj->flags & SENTINEL_SCRIPT_RUNNING) continue;
            /* The first node is the oldest as we add on tail. */
            listDelNode(sentinel.scripts_queue,ln);
            sentinelReleaseScriptJob(sj);
            break;
        }
        serverAssert(listLength(sentinel.scripts_queue) <=
                    SENTINEL_SCRIPT_MAX_QUEUE);
    }
}

/* Lookup a script in the scripts queue via pid, and returns the list node
 * (so that we can easily remove it from the queue if needed). */