WebSVN – HelenOS-historic – Diff – /uspace/trunk/libc/generic/ipc.c


/*
 * Copyright (C) 2006 Ondrej Palkovsky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <ipc.h>
#include <libc.h>
#include <malloc.h>
#include <errno.h>
#include <list.h>
#include <stdio.h>
#include <unistd.h>
 
/** Structure used for keeping track of sent async msgs
 * and queing unsent msgs
 *
 */
typedef struct {
    link_t list;
 
    ipc_async_callback_t callback;
    void *private;
    union {
        ipc_callid_t callid;
        struct {
            int phoneid;
            ipc_data_t data;
        } msg;
    }u;
} async_call_t;
 
LIST_INITIALIZE(dispatched_calls);
LIST_INITIALIZE(queued_calls);
 
int ipc_call_sync(int phoneid, ipcarg_t method, ipcarg_t arg1,
          ipcarg_t *result)
{
    ipc_data_t resdata;
    int callres;
   
    callres = __SYSCALL4(SYS_IPC_CALL_SYNC_FAST, phoneid, method, arg1,
                 (sysarg_t)&resdata);
    if (callres)
        return callres;
    if (result)
        *result = IPC_GET_ARG1(resdata);
    return IPC_GET_RETVAL(resdata);
}
 
int ipc_call_sync_3(int phoneid, ipcarg_t method, ipcarg_t arg1,
            ipcarg_t arg2, ipcarg_t arg3,
            ipcarg_t *result1, ipcarg_t *result2, ipcarg_t *result3)
{
    ipc_data_t data;
    int callres;
 
    IPC_SET_METHOD(data, method);
    IPC_SET_ARG1(data, arg1);
    IPC_SET_ARG2(data, arg2);
    IPC_SET_ARG3(data, arg3);
 
    callres = __SYSCALL3(SYS_IPC_CALL_SYNC, phoneid, (sysarg_t)&data,
                 (sysarg_t)&data);
    if (callres)
        return callres;
 
    if (result1)
        *result1 = IPC_GET_ARG1(data);
    if (result2)
        *result2 = IPC_GET_ARG2(data);
    if (result3)
        *result3 = IPC_GET_ARG3(data);
    return IPC_GET_RETVAL(data);
}
 
/** Syscall to send asynchronous message */
static  ipc_callid_t _ipc_call_async(int phoneid, ipc_data_t *data)
{
    return __SYSCALL2(SYS_IPC_CALL_ASYNC, phoneid, (sysarg_t)data);
}
 
/** Send asynchronous message
 *
 * - if fatal error, call callback handler with proper error code
 * - if message cannot be temporarily sent, add to queue
 */
void ipc_call_async_2(int phoneid, ipcarg_t method, ipcarg_t arg1,
              ipcarg_t arg2, void *private,
              ipc_async_callback_t callback)
{
    async_call_t *call;
    ipc_callid_t callid;
 
    call = malloc(sizeof(*call));
    if (!call) {
        callback(private, ENOMEM, NULL);
        return;
    }
       
    callid = __SYSCALL4(SYS_IPC_CALL_ASYNC_FAST, phoneid, method, arg1, arg2);
    if (callid == IPC_CALLRET_FATAL) {
        /* Call asynchronous handler with error code */
        callback(private, ENOENT, NULL);
        free(call);
        return;
    }
 
    call->callback = callback;
    call->private = private;
 
    if (callid == IPC_CALLRET_TEMPORARY) {
        /* Add asynchronous call to queue of non-dispatched async calls */
        call->u.msg.phoneid = phoneid;
        IPC_SET_METHOD(call->u.msg.data, method);
        IPC_SET_ARG1(call->u.msg.data, arg1);
        IPC_SET_ARG2(call->u.msg.data, arg2);
 
        list_append(&call->list, &queued_calls);
        return;
    }
    call->u.callid = callid;
    /* Add call to list of dispatched calls */
    list_append(&call->list, &dispatched_calls);
}
 
 
/** Send answer to a received call */
void ipc_answer(ipc_callid_t callid, ipcarg_t retval, ipcarg_t arg1,
        ipcarg_t arg2)
{
    __SYSCALL4(SYS_IPC_ANSWER_FAST, callid, retval, arg1, arg2);
}
 
 
/** Call syscall function sys_ipc_wait_for_call */
static inline ipc_callid_t _ipc_wait_for_call(ipc_call_t *call, int flags)
{
    return __SYSCALL3(SYS_IPC_WAIT, (sysarg_t)&call->data,
              (sysarg_t)&call->taskid, flags);
}
 
/** Try to dispatch queed calls from async queue */
static void try_dispatch_queued_calls(void)
{
    async_call_t *call;
    ipc_callid_t callid;
 
    while (!list_empty(&queued_calls)) {
        call = list_get_instance(queued_calls.next, async_call_t,
                     list);
 
        callid = _ipc_call_async(call->u.msg.phoneid,
                     &call->u.msg.data);
        if (callid == IPC_CALLRET_TEMPORARY)
            break;
        list_remove(&call->list);
        if (callid == IPC_CALLRET_FATAL) {
            call->callback(call->private, ENOENT, NULL);
            free(call);
        } else {
            call->u.callid = callid;
            list_append(&call->list, &dispatched_calls);
        }
    }
}
 
/** Handle received answer
 *
 * TODO: Make it use hash table
 *
 * @param callid Callid (with first bit set) of the answered call
 */
static void handle_answer(ipc_callid_t callid, ipc_data_t *data)
{
    link_t *item;
    async_call_t *call;
 
    callid &= ~IPC_CALLID_ANSWERED;
   
    for (item = dispatched_calls.next; item != &dispatched_calls;
         item = item->next) {
        call = list_get_instance(item, async_call_t, list);
        if (call->u.callid == callid) {
            list_remove(&call->list);
            call->callback(call->private,
                       IPC_GET_RETVAL(*data),
                       data);
            return;
        }
    }
    printf("Received unidentified answer: %P!!!\n", callid);
}
 
 
/** Wait for IPC call and return
 *
 * - dispatch ASYNC reoutines in the background
 * @param data Space where the message is stored
 * @return Callid or 0 if nothing available and started with
 *         IPC_WAIT_NONBLOCKING
 */
ipc_callid_t ipc_wait_for_call(ipc_call_t *call, int flags)
{
    ipc_callid_t callid;
 
    do {
        try_dispatch_queued_calls();
 
        callid = _ipc_wait_for_call(call, flags);
        /* Handle received answers */
        if (callid & IPC_CALLID_ANSWERED)
            handle_answer(callid, &call->data);
    } while (callid & IPC_CALLID_ANSWERED);
 
    return callid;
}
 
/** Ask destination to do a callback connection */
int ipc_connect_to_me(int phoneid, int arg1, int arg2,
              unsigned long long *taskid)
{
    return __SYSCALL4(SYS_IPC_CONNECT_TO_ME, phoneid, arg1, arg2,
              (sysarg_t) taskid);
}
 

Rev 1006	Rev 1028
1	/*	1	/*
2	* Copyright (C) 2006 Ondrej Palkovsky	2	* Copyright (C) 2006 Ondrej Palkovsky
3	* All rights reserved.	3	* All rights reserved.
4	*	4	*
5	* Redistribution and use in source and binary forms, with or without	5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions	6	* modification, are permitted provided that the following conditions
7	* are met:	7	* are met:
8	*	8	*
9	* - Redistributions of source code must retain the above copyright	9	* - Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.	10	* notice, this list of conditions and the following disclaimer.
11	* - Redistributions in binary form must reproduce the above copyright	11	* - Redistributions in binary form must reproduce the above copyright
12	* notice, this list of conditions and the following disclaimer in the	12	* notice, this list of conditions and the following disclaimer in the
13	* documentation and/or other materials provided with the distribution.	13	* documentation and/or other materials provided with the distribution.
14	* - The name of the author may not be used to endorse or promote products	14	* - The name of the author may not be used to endorse or promote products
15	* derived from this software without specific prior written permission.	15	* derived from this software without specific prior written permission.
16	*	16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR	17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES	18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.	19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,	20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT	21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,	22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF	25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27	*/	27	*/
28		28
29	#include <ipc.h>	29	#include <ipc.h>
30	#include <libc.h>	30	#include <libc.h>
31	#include <malloc.h>	31	#include <malloc.h>
32	#include <errno.h>	32	#include <errno.h>
33	#include <list.h>	33	#include <list.h>
34	#include <stdio.h>	34	#include <stdio.h>
35	#include <unistd.h>	35	#include <unistd.h>
36		36
37	/** Structure used for keeping track of sent async msgs	37	/** Structure used for keeping track of sent async msgs
38	* and queing unsent msgs	38	* and queing unsent msgs
39	*	39	*
40	*/	40	*/
41	typedef struct {	41	typedef struct {
42	link_t list;	42	link_t list;
43		43
44	ipc_async_callback_t callback;	44	ipc_async_callback_t callback;
45	void *private;	45	void *private;
46	union {	46	union {
47	ipc_callid_t callid;	47	ipc_callid_t callid;
48	struct {	48	struct {
49	int phoneid;	49	int phoneid;
50	ipc_data_t data;	50	ipc_data_t data;
51	} msg;	51	} msg;
52	}u;	52	}u;
53	} async_call_t;	53	} async_call_t;
54		54
55	LIST_INITIALIZE(dispatched_calls);	55	LIST_INITIALIZE(dispatched_calls);
56	LIST_INITIALIZE(queued_calls);	56	LIST_INITIALIZE(queued_calls);
57		57
58	int ipc_call_sync(int phoneid, ipcarg_t method, ipcarg_t arg1,	58	int ipc_call_sync(int phoneid, ipcarg_t method, ipcarg_t arg1,
59	ipcarg_t *result)	59	ipcarg_t *result)
60	{	60	{
61	ipc_data_t resdata;	61	ipc_data_t resdata;
62	int callres;	62	int callres;
63		63
64	callres = __SYSCALL4(SYS_IPC_CALL_SYNC_FAST, phoneid, method, arg1,	64	callres = __SYSCALL4(SYS_IPC_CALL_SYNC_FAST, phoneid, method, arg1,
65	(sysarg_t)&resdata);	65	(sysarg_t)&resdata);
66	if (callres)	66	if (callres)
67	return callres;	67	return callres;
68	if (result)	68	if (result)
69	*result = IPC_GET_ARG1(resdata);	69	*result = IPC_GET_ARG1(resdata);
70	return IPC_GET_RETVAL(resdata);	70	return IPC_GET_RETVAL(resdata);
71	}	71	}
72		72
73	int ipc_call_sync_3(int phoneid, ipcarg_t method, ipcarg_t arg1,	73	int ipc_call_sync_3(int phoneid, ipcarg_t method, ipcarg_t arg1,
74	ipcarg_t arg2, ipcarg_t arg3,	74	ipcarg_t arg2, ipcarg_t arg3,
75	ipcarg_t result1, ipcarg_t result2, ipcarg_t *result3)	75	ipcarg_t result1, ipcarg_t result2, ipcarg_t *result3)
76	{	76	{
77	ipc_data_t data;	77	ipc_data_t data;
78	int callres;	78	int callres;
79		79
80	IPC_SET_METHOD(data, method);	80	IPC_SET_METHOD(data, method);
81	IPC_SET_ARG1(data, arg1);	81	IPC_SET_ARG1(data, arg1);
82	IPC_SET_ARG2(data, arg2);	82	IPC_SET_ARG2(data, arg2);
83	IPC_SET_ARG3(data, arg3);	83	IPC_SET_ARG3(data, arg3);
84		84
85	callres = __SYSCALL3(SYS_IPC_CALL_SYNC, phoneid, (sysarg_t)&data,	85	callres = __SYSCALL3(SYS_IPC_CALL_SYNC, phoneid, (sysarg_t)&data,
86	(sysarg_t)&data);	86	(sysarg_t)&data);
87	if (callres)	87	if (callres)
88	return callres;	88	return callres;
89		89
90	if (result1)	90	if (result1)
91	*result1 = IPC_GET_ARG1(data);	91	*result1 = IPC_GET_ARG1(data);
92	if (result2)	92	if (result2)
93	*result2 = IPC_GET_ARG2(data);	93	*result2 = IPC_GET_ARG2(data);
94	if (result3)	94	if (result3)
95	*result3 = IPC_GET_ARG3(data);	95	*result3 = IPC_GET_ARG3(data);
96	return IPC_GET_RETVAL(data);	96	return IPC_GET_RETVAL(data);
97	}	97	}
98		98
99	/** Syscall to send asynchronous message */	99	/** Syscall to send asynchronous message */
100	static ipc_callid_t _ipc_call_async(int phoneid, ipc_data_t *data)	100	static ipc_callid_t _ipc_call_async(int phoneid, ipc_data_t *data)
101	{	101	{
102	return __SYSCALL2(SYS_IPC_CALL_ASYNC, phoneid, (sysarg_t)data);	102	return __SYSCALL2(SYS_IPC_CALL_ASYNC, phoneid, (sysarg_t)data);
103	}	103	}
104		104
105	/** Send asynchronous message	105	/** Send asynchronous message
106	*	106	*
107	* - if fatal error, call callback handler with proper error code	107	* - if fatal error, call callback handler with proper error code
108	* - if message cannot be temporarily sent, add to queue	108	* - if message cannot be temporarily sent, add to queue
109	*/	109	*/
110	void ipc_call_async_2(int phoneid, ipcarg_t method, ipcarg_t arg1,	110	void ipc_call_async_2(int phoneid, ipcarg_t method, ipcarg_t arg1,
111	ipcarg_t arg2, void *private,	111	ipcarg_t arg2, void *private,
112	ipc_async_callback_t callback)	112	ipc_async_callback_t callback)
113	{	113	{
114	async_call_t *call;	114	async_call_t *call;
115	ipc_callid_t callid;	115	ipc_callid_t callid;
116		116
117	call = malloc(sizeof(*call));	117	call = malloc(sizeof(*call));
118	if (!call) {	118	if (!call) {
119	callback(private, ENOMEM, NULL);	119	callback(private, ENOMEM, NULL);
-		120	return;
120	}	121	}
121		122
122	callid = __SYSCALL4(SYS_IPC_CALL_ASYNC_FAST, phoneid, method, arg1, arg2);	123	callid = __SYSCALL4(SYS_IPC_CALL_ASYNC_FAST, phoneid, method, arg1, arg2);
123	if (callid == IPC_CALLRET_FATAL) {	124	if (callid == IPC_CALLRET_FATAL) {
124	/* Call asynchronous handler with error code */	125	/* Call asynchronous handler with error code */
125	callback(private, ENOENT, NULL);	126	callback(private, ENOENT, NULL);
126	free(call);	127	free(call);
127	return;	128	return;
128	}	129	}
129		130
130	call->callback = callback;	131	call->callback = callback;
131	call->private = private;	132	call->private = private;
132		133
133	if (callid == IPC_CALLRET_TEMPORARY) {	134	if (callid == IPC_CALLRET_TEMPORARY) {
134	/* Add asynchronous call to queue of non-dispatched async calls */	135	/* Add asynchronous call to queue of non-dispatched async calls */
135	call->u.msg.phoneid = phoneid;	136	call->u.msg.phoneid = phoneid;
136	IPC_SET_METHOD(call->u.msg.data, method);	137	IPC_SET_METHOD(call->u.msg.data, method);
137	IPC_SET_ARG1(call->u.msg.data, arg1);	138	IPC_SET_ARG1(call->u.msg.data, arg1);
138	IPC_SET_ARG2(call->u.msg.data, arg2);	139	IPC_SET_ARG2(call->u.msg.data, arg2);
139		140
140	list_append(&call->list, &queued_calls);	141	list_append(&call->list, &queued_calls);
141	return;	142	return;
142	}	143	}
143	call->u.callid = callid;	144	call->u.callid = callid;
144	/* Add call to list of dispatched calls */	145	/* Add call to list of dispatched calls */
145	list_append(&call->list, &dispatched_calls);	146	list_append(&call->list, &dispatched_calls);
146	}	147	}
147		148
148		149
149	/** Send answer to a received call */	150	/** Send answer to a received call */
150	void ipc_answer(ipc_callid_t callid, ipcarg_t retval, ipcarg_t arg1,	151	void ipc_answer(ipc_callid_t callid, ipcarg_t retval, ipcarg_t arg1,
151	ipcarg_t arg2)	152	ipcarg_t arg2)
152	{	153	{
153	__SYSCALL4(SYS_IPC_ANSWER_FAST, callid, retval, arg1, arg2);	154	__SYSCALL4(SYS_IPC_ANSWER_FAST, callid, retval, arg1, arg2);
154	}	155	}
155		156
156		157
157	/** Call syscall function sys_ipc_wait_for_call */	158	/** Call syscall function sys_ipc_wait_for_call */
158	static inline ipc_callid_t _ipc_wait_for_call(ipc_call_t *call, int flags)	159	static inline ipc_callid_t _ipc_wait_for_call(ipc_call_t *call, int flags)
159	{	160	{
160	return __SYSCALL3(SYS_IPC_WAIT, (sysarg_t)&call->data,	161	return __SYSCALL3(SYS_IPC_WAIT, (sysarg_t)&call->data,
161	(sysarg_t)&call->taskid, flags);	162	(sysarg_t)&call->taskid, flags);
162	}	163	}
163		164
164	/** Try to dispatch queed calls from async queue */	165	/** Try to dispatch queed calls from async queue */
165	static void try_dispatch_queued_calls(void)	166	static void try_dispatch_queued_calls(void)
166	{	167	{
167	async_call_t *call;	168	async_call_t *call;
168	ipc_callid_t callid;	169	ipc_callid_t callid;
169		170
170	while (!list_empty(&queued_calls)) {	171	while (!list_empty(&queued_calls)) {
171	call = list_get_instance(queued_calls.next, async_call_t,	172	call = list_get_instance(queued_calls.next, async_call_t,
172	list);	173	list);
173		174
174	callid = _ipc_call_async(call->u.msg.phoneid,	175	callid = _ipc_call_async(call->u.msg.phoneid,
175	&call->u.msg.data);	176	&call->u.msg.data);
176	if (callid == IPC_CALLRET_TEMPORARY)	177	if (callid == IPC_CALLRET_TEMPORARY)
177	break;	178	break;
178	list_remove(&call->list);	179	list_remove(&call->list);
179	if (callid == IPC_CALLRET_FATAL) {	180	if (callid == IPC_CALLRET_FATAL) {
180	call->callback(call->private, ENOENT, NULL);	181	call->callback(call->private, ENOENT, NULL);
181	free(call);	182	free(call);
182	} else {	183	} else {
183	call->u.callid = callid;	184	call->u.callid = callid;
184	list_append(&call->list, &dispatched_calls);	185	list_append(&call->list, &dispatched_calls);
185	}	186	}
186	}	187	}
187	}	188	}
188		189
189	/** Handle received answer	190	/** Handle received answer
190	*	191	*
191	* TODO: Make it use hash table	192	* TODO: Make it use hash table
192	*	193	*
193	* @param callid Callid (with first bit set) of the answered call	194	* @param callid Callid (with first bit set) of the answered call
194	*/	195	*/
195	static void handle_answer(ipc_callid_t callid, ipc_data_t *data)	196	static void handle_answer(ipc_callid_t callid, ipc_data_t *data)
196	{	197	{
197	link_t *item;	198	link_t *item;
198	async_call_t *call;	199	async_call_t *call;
199		200
200	callid &= ~IPC_CALLID_ANSWERED;	201	callid &= ~IPC_CALLID_ANSWERED;
201		202
202	for (item = dispatched_calls.next; item != &dispatched_calls;	203	for (item = dispatched_calls.next; item != &dispatched_calls;
203	item = item->next) {	204	item = item->next) {
204	call = list_get_instance(item, async_call_t, list);	205	call = list_get_instance(item, async_call_t, list);
205	if (call->u.callid == callid) {	206	if (call->u.callid == callid) {
206	list_remove(&call->list);	207	list_remove(&call->list);
207	call->callback(call->private,	208	call->callback(call->private,
208	IPC_GET_RETVAL(*data),	209	IPC_GET_RETVAL(*data),
209	data);	210	data);
210	return;	211	return;
211	}	212	}
212	}	213	}
213	printf("Received unidentified answer: %P!!!\n", callid);	214	printf("Received unidentified answer: %P!!!\n", callid);
214	}	215	}
215		216
216		217
217	/** Wait for IPC call and return	218	/** Wait for IPC call and return
218	*	219	*
219	* - dispatch ASYNC reoutines in the background	220	* - dispatch ASYNC reoutines in the background
220	* @param data Space where the message is stored	221	* @param data Space where the message is stored
221	* @return Callid or 0 if nothing available and started with	222	* @return Callid or 0 if nothing available and started with
222	* IPC_WAIT_NONBLOCKING	223	* IPC_WAIT_NONBLOCKING
223	*/	224	*/
224	int ipc_wait_for_call(ipc_call_t *call, int flags)	225	ipc_callid_t ipc_wait_for_call(ipc_call_t *call, int flags)
225	{	226	{
226	ipc_callid_t callid;	227	ipc_callid_t callid;
227		228
228	do {	229	do {
229	try_dispatch_queued_calls();	230	try_dispatch_queued_calls();
230		231
231	callid = _ipc_wait_for_call(call, flags);	232	callid = _ipc_wait_for_call(call, flags);
232	/* Handle received answers */	233	/* Handle received answers */
233	if (callid & IPC_CALLID_ANSWERED)	234	if (callid & IPC_CALLID_ANSWERED)
234	handle_answer(callid, &call->data);	235	handle_answer(callid, &call->data);
235	} while (callid & IPC_CALLID_ANSWERED);	236	} while (callid & IPC_CALLID_ANSWERED);
236		237
237	return callid;	238	return callid;
238	}	239	}
-		240
-		241	/** Ask destination to do a callback connection */
-		242	int ipc_connect_to_me(int phoneid, int arg1, int arg2,
-		243	unsigned long long *taskid)
-		244	{
-		245	return __SYSCALL4(SYS_IPC_CONNECT_TO_ME, phoneid, arg1, arg2,
-		246	(sysarg_t) taskid);
-		247	}
239		248

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(root)/uspace/trunk/libc/generic/ipc.c @ 1653 – Rev 1006 → 1028