WebSVN – HelenOS – Diff – /trunk/uspace/lib/libc/generic/async.c



        tmp = tmp->next;
    }
    list_append(&wd->link, tmp);
}
 
 
 
/** Try to route a call to an appropriate connection fibril
 *
 */
static int route_call(ipc_callid_t callid, ipc_call_t *call)
{
    connection_t *conn;

    futex_up(&async_futex);
 
    return 1;
}
 
/** Return new incoming message for the current (fibril-local) connection */
ipc_callid_t async_get_call_timeout(ipc_call_t *call, suseconds_t usecs)
{
    msg_t *msg;
    ipc_callid_t callid;
    connection_t *conn;

   
    futex_up(&async_futex);
    return callid;
}
 
/** Fibril function that gets created on new connection
 *
 * This function is defined as a weak symbol - to be redefined in
 * user code.
 */
static void default_client_connection(ipc_callid_t callid, ipc_call_t *call)

}
static void default_interrupt_received(ipc_callid_t callid, ipc_call_t *call)
{
}
 
/** Wrapper for client connection fibril.
 *
 * When new connection arrives, a fibril with this implementing function is
 * created. It calls client_connection() and does the final cleanup.
 *
 
 * @param arg       Connection structure pointer
 *
 * @return      Always zero.
 */
static int connection_fibril(void  *arg)
{
    unsigned long key;
    msg_t *msg;
    int close_answered = 0;
 
    /* Setup fibril-local connection pointer */
    FIBRIL_connection = (connection_t *) arg;
    FIBRIL_connection->cfibril(FIBRIL_connection->callid,
        &FIBRIL_connection->call);
   
    /* Remove myself from connection hash table */

        ipc_answer_fast(FIBRIL_connection->close_callid, 0, 0, 0);
   
    return 0;
}
 
/** Create a new fibril for a new connection.
 *
 * Creates new fibril for connection, fills in connection structures and inserts
 
 * it into the hash table, so that later we can easily do routing of messages to
 * particular fibrils.
 *
 * @param in_phone_hash Identification of the incoming connection
 * @param callid    Callid of the IPC_M_CONNECT_ME_TO packet
 * @param call      Call data of the opening packet
 * @param cfibril   Fibril function that should be called upon
 *                  opening the connection
 * @return      New fibril id.
 */
fid_t async_new_connection(ipcarg_t in_phone_hash, ipc_callid_t callid,
    ipc_call_t *call, void (*cfibril)(ipc_callid_t, ipc_call_t *))
{
    connection_t *conn;

    fibril_add_ready(conn->wdata.fid);
 
    return conn->wdata.fid;
}
 
/** Handle a call that was received. */
static void handle_call(ipc_callid_t callid, ipc_call_t *call)
{
    /* Unrouted call - do some default behaviour */
    if ((callid & IPC_CALLID_NOTIFICATION)) {
        in_interrupt_handler = 1;

        return;
    }      
 
    switch (IPC_GET_METHOD(*call)) {
    case IPC_M_CONNECT_ME_TO:
        /* Open new connection with fibril etc. */
        async_new_connection(IPC_GET_ARG3(*call), callid, call,
            client_connection);
        return;
    }
 

 
    /* Unknown call from unknown phone - hang it up */
    ipc_answer_fast(callid, EHANGUP, 0, 0);
}
 
/** Fire all timeouts that expired. */
 
 
static void handle_expired_timeouts(void)
{
    struct timeval tv;
    awaiter_t *waiter;
    link_t *cur;

            break;
        cur = cur->next;
        list_remove(&waiter->link);
        waiter->inlist = 0;
        waiter->timedout = 1;
        /* Redundant condition? The fibril should not
         * be active when it gets here.
         */
        if (!waiter->active) {
            waiter->active = 1;
            fibril_add_ready(waiter->fid);

 
    while (1) {
        if (fibril_schedule_next_adv(FIBRIL_FROM_MANAGER)) {
            futex_up(&async_futex);
            /* async_futex is always held
             * when entering manager fibril
             */
            continue;
        }
        futex_down(&async_futex);
        if (!list_empty(&timeout_list)) {

    }
   
    return 0;
}
 
/** Function to start async_manager as a standalone fibril.
 *
 * When more kernel threads are used, one async manager should
 
 
 * exist per thread.
 */
static int async_manager_fibril(void *arg)
{
    futex_up(&async_futex);
    /* async_futex is always locked when entering

 
/** IPC handler for messages in async framework
 *
 * Notify the fibril which is waiting for this message, that it arrived
 */
static void reply_received(void *private, int retval, ipc_call_t *data)
 
{
    amsg_t *msg = (amsg_t *) private;
 
    msg->retval = retval;
 

 *
 * The return value can be used as input for async_wait() to wait
 * for completion.
 */
aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2,
    ipc_call_t *dataptr)
{
    amsg_t *msg;
 
    if (in_interrupt_handler) {
        printf("Cannot send asynchronous request in interrupt "

 *
 * The return value can be used as input for async_wait() to wait
 * for completion.
 */
aid_t async_send_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2,
    ipcarg_t arg3, ipc_call_t *dataptr)
{
    amsg_t *msg;
 
    if (in_interrupt_handler) {
        printf("Cannot send asynchronous request in interrupt handler.\n");

    return (aid_t) msg;
}
 
/** Wait for a message sent by async framework
 *
 * @param amsgid    Message ID to wait for
 * @param retval    Pointer to variable where will be stored retval of the
 *          answered message. If NULL, it is ignored.
 
 */
void async_wait_for(aid_t amsgid, ipcarg_t *retval)
{
    amsg_t *msg = (amsg_t *) amsgid;
 

    gettimeofday(&msg->wdata.expires, NULL);
    tv_add(&msg->wdata.expires, timeout);
 
    futex_down(&async_futex);
    insert_timeout(&msg->wdata);
    /* Leave locked the async_futex when entering this function */
    fibril_schedule_next_adv(FIBRIL_TO_MANAGER);
    /* futex is up automatically after fibril_schedule_next_adv()...*/
    free(msg);
}
 
/** Set function that is called when IPC_M_CONNECT_ME_TO is received.
 *
 * @param conn Function that will form a new fibril.
 */
void async_set_client_connection(async_client_conn_t conn)
{
    client_connection = conn;
}

Rev 2484	Rev 2485
Line 254...	Line 254...
254	tmp = tmp->next;	254	tmp = tmp->next;
255	}	255	}
256	list_append(&wd->link, tmp);	256	list_append(&wd->link, tmp);
257	}	257	}
258		258
259	/*************************************************/	-
260		-
261	/** Try to route a call to an appropriate connection thread	259	/** Try to route a call to an appropriate connection fibril
262	*	260	*
263	*/	261	*/
264	static int route_call(ipc_callid_t callid, ipc_call_t *call)	262	static int route_call(ipc_callid_t callid, ipc_call_t *call)
265	{	263	{
266	connection_t *conn;	264	connection_t *conn;
Line 300...	Line 298...
300	futex_up(&async_futex);	298	futex_up(&async_futex);
301		299
302	return 1;	300	return 1;
303	}	301	}
304		302
305	/** Return new incoming message for current(thread-local) connection */	303	/** Return new incoming message for the current (fibril-local) connection */
306	ipc_callid_t async_get_call_timeout(ipc_call_t *call, suseconds_t usecs)	304	ipc_callid_t async_get_call_timeout(ipc_call_t *call, suseconds_t usecs)
307	{	305	{
308	msg_t *msg;	306	msg_t *msg;
309	ipc_callid_t callid;	307	ipc_callid_t callid;
310	connection_t *conn;	308	connection_t *conn;
Line 351...	Line 349...
351		349
352	futex_up(&async_futex);	350	futex_up(&async_futex);
353	return callid;	351	return callid;
354	}	352	}
355		353
356	/** Thread function that gets created on new connection	354	/** Fibril function that gets created on new connection
357	*	355	*
358	* This function is defined as a weak symbol - to be redefined in	356	* This function is defined as a weak symbol - to be redefined in
359	* user code.	357	* user code.
360	*/	358	*/
361	static void default_client_connection(ipc_callid_t callid, ipc_call_t *call)	359	static void default_client_connection(ipc_callid_t callid, ipc_call_t *call)
Line 364...	Line 362...
364	}	362	}
365	static void default_interrupt_received(ipc_callid_t callid, ipc_call_t *call)	363	static void default_interrupt_received(ipc_callid_t callid, ipc_call_t *call)
366	{	364	{
367	}	365	}
368		366
369	/** Wrapper for client connection thread	367	/** Wrapper for client connection fibril.
-		368	*
-		369	* When new connection arrives, a fibril with this implementing function is
-		370	* created. It calls client_connection() and does the final cleanup.
370	*	371	*
371	* When new connection arrives, thread with this function is created.	-
372	* It calls client_connection and does final cleanup.	372	* @param arg Connection structure pointer
373	*	373	*
374	* @param arg Connection structure pointer	374	* @return Always zero.
375	*/	375	*/
376	static int connection_fibril(void *arg)	376	static int connection_fibril(void *arg)
377	{	377	{
378	unsigned long key;	378	unsigned long key;
379	msg_t *msg;	379	msg_t *msg;
380	int close_answered = 0;	380	int close_answered = 0;
381		381
382	/* Setup thread local connection pointer */	382	/* Setup fibril-local connection pointer */
383	FIBRIL_connection = (connection_t *) arg;	383	FIBRIL_connection = (connection_t *) arg;
384	FIBRIL_connection->cfibril(FIBRIL_connection->callid,	384	FIBRIL_connection->cfibril(FIBRIL_connection->callid,
385	&FIBRIL_connection->call);	385	&FIBRIL_connection->call);
386		386
387	/* Remove myself from connection hash table */	387	/* Remove myself from connection hash table */
Line 404...	Line 404...
404	ipc_answer_fast(FIBRIL_connection->close_callid, 0, 0, 0);	404	ipc_answer_fast(FIBRIL_connection->close_callid, 0, 0, 0);
405		405
406	return 0;	406	return 0;
407	}	407	}
408		408
409	/** Create new thread for a new connection	409	/** Create a new fibril for a new connection.
410	*	410	*
411	* Creates new thread for connection, fills in connection	411	* Creates new fibril for connection, fills in connection structures and inserts
412	* structures and inserts it into the hash table, so that	-
413	* later we can easily do routing of messages to particular	412	* it into the hash table, so that later we can easily do routing of messages to
414	* threads.	413	* particular fibrils.
415	*	414	*
416	* @param in_phone_hash Identification of the incoming connection	415	* @param in_phone_hash Identification of the incoming connection
417	* @param callid Callid of the IPC_M_CONNECT_ME_TO packet	416	* @param callid Callid of the IPC_M_CONNECT_ME_TO packet
418	* @param call Call data of the opening packet	417	* @param call Call data of the opening packet
419	* @param cfibril Fibril function that should be called upon	418	* @param cfibril Fibril function that should be called upon
420	* opening the connection	419	* opening the connection
421	* @return New fibril id.	420	* @return New fibril id.
422	*/	421	*/
423	fid_t async_new_connection(ipcarg_t in_phone_hash, ipc_callid_t callid,	422	fid_t async_new_connection(ipcarg_t in_phone_hash, ipc_callid_t callid,
424	ipc_call_t call, void (cfibril)(ipc_callid_t, ipc_call_t *))	423	ipc_call_t call, void (cfibril)(ipc_callid_t, ipc_call_t *))
425	{	424	{
426	connection_t *conn;	425	connection_t *conn;
Line 455...	Line 454...
455	fibril_add_ready(conn->wdata.fid);	454	fibril_add_ready(conn->wdata.fid);
456		455
457	return conn->wdata.fid;	456	return conn->wdata.fid;
458	}	457	}
459		458
460	/** Handle call that was received */	459	/** Handle a call that was received. */
461	static void handle_call(ipc_callid_t callid, ipc_call_t *call)	460	static void handle_call(ipc_callid_t callid, ipc_call_t *call)
462	{	461	{
463	/* Unrouted call - do some default behaviour */	462	/* Unrouted call - do some default behaviour */
464	if ((callid & IPC_CALLID_NOTIFICATION)) {	463	if ((callid & IPC_CALLID_NOTIFICATION)) {
465	in_interrupt_handler = 1;	464	in_interrupt_handler = 1;
Line 468...	Line 467...
468	return;	467	return;
469	}	468	}
470		469
471	switch (IPC_GET_METHOD(*call)) {	470	switch (IPC_GET_METHOD(*call)) {
472	case IPC_M_CONNECT_ME_TO:	471	case IPC_M_CONNECT_ME_TO:
473	/* Open new connection with thread etc. */	472	/* Open new connection with fibril etc. */
474	async_new_connection(IPC_GET_ARG3(*call), callid, call,	473	async_new_connection(IPC_GET_ARG3(*call), callid, call,
475	client_connection);	474	client_connection);
476	return;	475	return;
477	}	476	}
478		477
Line 482...	Line 481...
482		481
483	/* Unknown call from unknown phone - hang it up */	482	/* Unknown call from unknown phone - hang it up */
484	ipc_answer_fast(callid, EHANGUP, 0, 0);	483	ipc_answer_fast(callid, EHANGUP, 0, 0);
485	}	484	}
486		485
487	/** Fire all timeouts that expired	486	/** Fire all timeouts that expired. */
488	*	-
489	*/	-
490	static void handle_expired_timeouts(void)	487	static void handle_expired_timeouts(void)
491	{	488	{
492	struct timeval tv;	489	struct timeval tv;
493	awaiter_t *waiter;	490	awaiter_t *waiter;
494	link_t *cur;	491	link_t *cur;
Line 503...	Line 500...
503	break;	500	break;
504	cur = cur->next;	501	cur = cur->next;
505	list_remove(&waiter->link);	502	list_remove(&waiter->link);
506	waiter->inlist = 0;	503	waiter->inlist = 0;
507	waiter->timedout = 1;	504	waiter->timedout = 1;
508	/* Redundant condition? The thread should not	505	/* Redundant condition? The fibril should not
509	* be active when it gets here.	506	* be active when it gets here.
510	*/	507	*/
511	if (!waiter->active) {	508	if (!waiter->active) {
512	waiter->active = 1;	509	waiter->active = 1;
513	fibril_add_ready(waiter->fid);	510	fibril_add_ready(waiter->fid);
Line 528...	Line 525...
528		525
529	while (1) {	526	while (1) {
530	if (fibril_schedule_next_adv(FIBRIL_FROM_MANAGER)) {	527	if (fibril_schedule_next_adv(FIBRIL_FROM_MANAGER)) {
531	futex_up(&async_futex);	528	futex_up(&async_futex);
532	/* async_futex is always held	529	/* async_futex is always held
533	* when entering manager thread	530	* when entering manager fibril
534	*/	531	*/
535	continue;	532	continue;
536	}	533	}
537	futex_down(&async_futex);	534	futex_down(&async_futex);
538	if (!list_empty(&timeout_list)) {	535	if (!list_empty(&timeout_list)) {
Line 564...	Line 561...
564	}	561	}
565		562
566	return 0;	563	return 0;
567	}	564	}
568		565
569	/** Function to start async_manager as a standalone thread	566	/** Function to start async_manager as a standalone fibril.
570	*	567	*
571	* When more kernel threads are used, one async manager should	568	* When more kernel threads are used, one async manager should
572	* exist per thread. The particular implementation may change,	-
573	* currently one async_manager is started automatically per kernel	-
574	* thread except the main thread.	569	* exist per thread.
575	*/	570	*/
576	static int async_manager_fibril(void *arg)	571	static int async_manager_fibril(void *arg)
577	{	572	{
578	futex_up(&async_futex);	573	futex_up(&async_futex);
579	/* async_futex is always locked when entering	574	/* async_futex is always locked when entering
Line 612...	Line 607...
612		607
613	/** IPC handler for messages in async framework	608	/** IPC handler for messages in async framework
614	*	609	*
615	* Notify the fibril which is waiting for this message, that it arrived	610	* Notify the fibril which is waiting for this message, that it arrived
616	*/	611	*/
617	static void reply_received(void *private, int retval,	612	static void reply_received(void private, int retval, ipc_call_t data)
618	ipc_call_t *data)	-
619	{	613	{
620	amsg_t msg = (amsg_t ) private;	614	amsg_t msg = (amsg_t ) private;
621		615
622	msg->retval = retval;	616	msg->retval = retval;
623		617
Line 644...	Line 638...
644	*	638	*
645	* The return value can be used as input for async_wait() to wait	639	* The return value can be used as input for async_wait() to wait
646	* for completion.	640	* for completion.
647	*/	641	*/
648	aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2,	642	aid_t async_send_2(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2,
649	ipc_call_t *dataptr)	643	ipc_call_t *dataptr)
650	{	644	{
651	amsg_t *msg;	645	amsg_t *msg;
652		646
653	if (in_interrupt_handler) {	647	if (in_interrupt_handler) {
654	printf("Cannot send asynchronous request in interrupt "	648	printf("Cannot send asynchronous request in interrupt "
Line 671...	Line 665...
671	*	665	*
672	* The return value can be used as input for async_wait() to wait	666	* The return value can be used as input for async_wait() to wait
673	* for completion.	667	* for completion.
674	*/	668	*/
675	aid_t async_send_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2,	669	aid_t async_send_3(int phoneid, ipcarg_t method, ipcarg_t arg1, ipcarg_t arg2,
676	ipcarg_t arg3, ipc_call_t *dataptr)	670	ipcarg_t arg3, ipc_call_t *dataptr)
677	{	671	{
678	amsg_t *msg;	672	amsg_t *msg;
679		673
680	if (in_interrupt_handler) {	674	if (in_interrupt_handler) {
681	printf("Cannot send asynchronous request in interrupt handler.\n");	675	printf("Cannot send asynchronous request in interrupt handler.\n");
Line 694...	Line 688...
694	return (aid_t) msg;	688	return (aid_t) msg;
695	}	689	}
696		690
697	/** Wait for a message sent by async framework	691	/** Wait for a message sent by async framework
698	*	692	*
699	* @param amsgid Message ID to wait for	693	* @param amsgid Message ID to wait for
700	* @param retval Pointer to variable where will be stored retval	694	* @param retval Pointer to variable where will be stored retval of the
701	* of the answered message. If NULL, it is ignored.	695	* answered message. If NULL, it is ignored.
702	*	-
703	*/	696	*/
704	void async_wait_for(aid_t amsgid, ipcarg_t *retval)	697	void async_wait_for(aid_t amsgid, ipcarg_t *retval)
705	{	698	{
706	amsg_t msg = (amsg_t ) amsgid;	699	amsg_t msg = (amsg_t ) amsgid;
707		700
Line 791...	Line 784...
791	gettimeofday(&msg->wdata.expires, NULL);	784	gettimeofday(&msg->wdata.expires, NULL);
792	tv_add(&msg->wdata.expires, timeout);	785	tv_add(&msg->wdata.expires, timeout);
793		786
794	futex_down(&async_futex);	787	futex_down(&async_futex);
795	insert_timeout(&msg->wdata);	788	insert_timeout(&msg->wdata);
796	/* Leave locked async_futex when entering this function */	789	/* Leave locked the async_futex when entering this function */
797	fibril_schedule_next_adv(FIBRIL_TO_MANAGER);	790	fibril_schedule_next_adv(FIBRIL_TO_MANAGER);
798	/* futex is up automatically after fibril_schedule_next...*/	791	/* futex is up automatically after fibril_schedule_next_adv()...*/
799	free(msg);	792	free(msg);
800	}	793	}
801		794
802	/** Set function that is called, IPC_M_CONNECT_ME_TO is received	795	/** Set function that is called when IPC_M_CONNECT_ME_TO is received.
803	*	796	*
804	* @param conn Function that will form new psthread.	797	* @param conn Function that will form a new fibril.
805	*/	798	*/
806	void async_set_client_connection(async_client_conn_t conn)	799	void async_set_client_connection(async_client_conn_t conn)
807	{	800	{
808	client_connection = conn;	801	client_connection = conn;
809	}	802	}

Subversion Repositories HelenOS

(root)/trunk/uspace/lib/libc/generic/async.c @ 4718 – Rev 2484 → 2485