WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/include/ipc/ipc.h


/*
 * 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.
 */
 
#ifndef __IPC_H__
#define __IPC_H__
 
/* Length of data being transfered with IPC call */
/* - the uspace may not be able to utilize full length */
#define IPC_CALL_LEN    4
 
/** Maximum active async calls per thread */
#define IPC_MAX_ASYNC_CALLS  4
 
/* Flags for calls */
#define IPC_CALL_ANSWERED       (1<<0) /**< This is answer to a call */
#define IPC_CALL_STATIC_ALLOC   (1<<1) /**< This call will not be freed on error */
#define IPC_CALL_DISCARD_ANSWER (1<<2) /**< Answer will not be passed to
                    * userspace, will be discarded */
#define IPC_CALL_FORWARDED      (1<<3) /* Call was forwarded */
#define IPC_CALL_CONN_ME_TO     (1<<4) /* Identify connect_me_to */
#define IPC_CALL_NOTIF          (1<<5) /* Interrupt notification */
 
/* Flags for ipc_wait_for_call */
#define IPC_WAIT_NONBLOCKING   1
 
/* Flags of callid (the addresses are aligned at least to 4,
 * that is why we can use bottom 2 bits of the call address
 */
#define IPC_CALLID_ANSWERED       1 /**< Type of this msg is 'answer' */
#define IPC_CALLID_NOTIFICATION   2 /**< Type of this msg is 'notification' */
 
/* Return values from IPC_ASYNC */
#define IPC_CALLRET_FATAL         -1
#define IPC_CALLRET_TEMPORARY     -2
 
 
/* Macros for manipulating calling data */
#define IPC_SET_RETVAL(data, retval)   ((data).args[0] = (retval))
#define IPC_SET_METHOD(data, val)   ((data).args[0] = (val))
#define IPC_SET_ARG1(data, val)   ((data).args[1] = (val))
#define IPC_SET_ARG2(data, val)   ((data).args[2] = (val))
#define IPC_SET_ARG3(data, val)   ((data).args[3] = (val))
 
#define IPC_GET_METHOD(data)           ((data).args[0])
#define IPC_GET_RETVAL(data)           ((data).args[0])
 
#define IPC_GET_ARG1(data)              ((data).args[1])
#define IPC_GET_ARG2(data)              ((data).args[2])
#define IPC_GET_ARG3(data)              ((data).args[3])
 
/* Well known phone descriptors */
#define PHONE_NS              0
 
/* System-specific methods - only through special syscalls
 * These methods have special behaviour
 */
/** Protocol for CONNECT - TO - ME
 *
 * Calling process asks the callee to create a callback connection,
 * so that it can start initiating new messages.
 *
 * The protocol for negotiating is:
 * - sys_connect_to_me - sends a message IPC_M_CONNECTTOME
 * - sys_wait_for_call - upon receipt tries to allocate new phone
 *                       - if it fails, responds with ELIMIT
 *                     - passes call to userspace. If userspace
 *                       responds with error, phone is deallocated and
 *                       error is sent back to caller. Otherwise
 *                       the call is accepted and the response is sent back.
 *                     - the allocated phoneid is passed to userspace
 *                       (on the receiving sid) as ARG3 of the call.
 *                     - the caller obtains taskid of the called thread
 */
#define IPC_M_CONNECT_TO_ME     1
/** Protocol for CONNECT - ME - TO
 *
 * Calling process asks the callee to create for him a new connection.
 * E.g. the caller wants a name server to connect him to print server.
 *
 * The protocol for negotiating is:
 * - sys_connect_me_to - send a synchronous message to name server
 *                       indicating that it wants to be connected to some
 *                       service
 *                     - arg1/2 are user specified, arg3 contains
 *                       address of the phone that should be connected
 *                       (TODO: it leaks to userspace)
 *   recipient         -  if ipc_answer == 0, then accept connection
 *                     -  otherwise connection refused
 *                     -  recepient may forward message. Forwarding
 *                        system message
 *
 */
#define IPC_M_CONNECT_ME_TO     2
/** This message is sent to answerbox when the phone
 * is hung up
 */
#define IPC_M_PHONE_HUNGUP      3
/** Interrupt notification */
#define IPC_M_INTERRUPT         4
/** Send as_area over IPC
 * - ARG2 - src base address
 * - ARG3 - size of src as(filled automatically by kernel)
 * - on answer ARG1 - dst base adress
 */
#define IPC_M_AS_AREA_SEND      5
 
 
/* Well-known methods */
#define IPC_M_LAST_SYSTEM     511
#define IPC_M_PING            512
/* User methods */
#define FIRST_USER_METHOD     1024
 
#ifdef KERNEL
 
#include <synch/mutex.h>
#include <synch/condvar.h>
#include <adt/list.h>
 
#define IPC_MAX_PHONES  16
 
typedef struct answerbox_s answerbox_t;
typedef struct phone_s phone_t;
typedef struct {
    __native args[IPC_CALL_LEN];
    phone_t *phone;
}ipc_data_t;
 
struct answerbox_s {
    SPINLOCK_DECLARE(lock);
 
    task_t *task;
 
    waitq_t wq;
 
    link_t connected_phones; /**< Phones connected to this answerbox */
    link_t calls;            /**< Received calls */
    link_t dispatched_calls; /* Should be hash table in the future */
 
    link_t answers;          /**< Answered calls */
 
    SPINLOCK_DECLARE(irq_lock);
    link_t irq_notifs;       /**< Notifications from IRQ handlers */
};
 
typedef enum {
    IPC_BUSY_FREE = 0,
    IPC_BUSY_CONNECTING,
    IPC_BUSY_CONNECTED
} ipc_busy_t;
 
struct phone_s {
    SPINLOCK_DECLARE(lock);
    link_t list;
    answerbox_t *callee;
    ipc_busy_t busy;
    atomic_t active_calls;
};
 
typedef struct {
    link_t list;
 
    int flags;
 
    /* Identification of the caller */
    task_t *sender;
    /* The caller box is different from sender->answerbox
     * for synchronous calls
     */
    answerbox_t *callerbox;
 
    __native private; /**< Private data to internal IPC */
 
    ipc_data_t data;  /**< Data passed from/to userspace */
}call_t;
 
extern void ipc_init(void);
extern call_t * ipc_wait_for_call(answerbox_t *box, int flags);
extern void ipc_answer(answerbox_t *box, call_t *request);
extern int ipc_call(phone_t *phone, call_t *call);
extern void ipc_call_sync(phone_t *phone, call_t *request);
extern void ipc_phone_init(phone_t *phone);
extern void ipc_phone_connect(phone_t *phone, answerbox_t *box);
extern void ipc_call_free(call_t *call);
extern call_t * ipc_call_alloc(int flags);
extern void ipc_answerbox_init(answerbox_t *box);
extern void ipc_call_static_init(call_t *call);
extern void task_print_list(void);
extern int ipc_forward(call_t *call, phone_t *newphone, answerbox_t *oldbox);
extern void ipc_cleanup(task_t *task);
extern int ipc_phone_hangup(phone_t *phone);
extern void ipc_backsend_err(phone_t *phone, call_t *call, __native err);
 
 
extern answerbox_t *ipc_phone_0;
 
#endif
 
#endif
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/include/ipc/ipc.h – Rev 1342 → 1359

Rev 1342		Rev 1359
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	#ifndef __IPC_H__	29	#ifndef __IPC_H__
30	#define __IPC_H__	30	#define __IPC_H__
31		31
32	/* Length of data being transfered with IPC call */	32	/* Length of data being transfered with IPC call */
33	/* - the uspace may not be able to utilize full length */	33	/* - the uspace may not be able to utilize full length */
34	#define IPC_CALL_LEN 4	34	#define IPC_CALL_LEN 4
35		35
36	/** Maximum active async calls per thread */	36	/** Maximum active async calls per thread */
37	#define IPC_MAX_ASYNC_CALLS 4	37	#define IPC_MAX_ASYNC_CALLS 4
38		38
39	/* Flags for calls */	39	/* Flags for calls */
40	#define IPC_CALL_ANSWERED (1<<0) /*< This is answer to a call /	40	#define IPC_CALL_ANSWERED (1<<0) /*< This is answer to a call /
41	#define IPC_CALL_STATIC_ALLOC (1<<1) /*< This call will not be freed on error /	41	#define IPC_CALL_STATIC_ALLOC (1<<1) /*< This call will not be freed on error /
42	#define IPC_CALL_DISCARD_ANSWER (1<<2) /**< Answer will not be passed to	42	#define IPC_CALL_DISCARD_ANSWER (1<<2) /**< Answer will not be passed to
43	* userspace, will be discarded */	43	* userspace, will be discarded */
44	#define IPC_CALL_FORWARDED (1<<3) /* Call was forwarded */	44	#define IPC_CALL_FORWARDED (1<<3) /* Call was forwarded */
45	#define IPC_CALL_CONN_ME_TO (1<<4) /* Identify connect_me_to */	45	#define IPC_CALL_CONN_ME_TO (1<<4) /* Identify connect_me_to */
46	#define IPC_CALL_NOTIF (1<<5) /* Interrupt notification */	46	#define IPC_CALL_NOTIF (1<<5) /* Interrupt notification */
47		47
48	/* Flags for ipc_wait_for_call */	48	/* Flags for ipc_wait_for_call */
49	#define IPC_WAIT_NONBLOCKING 1	49	#define IPC_WAIT_NONBLOCKING 1
50		50
51	/* Flags of callid (the addresses are aligned at least to 4,	51	/* Flags of callid (the addresses are aligned at least to 4,
52	* that is why we can use bottom 2 bits of the call address	52	* that is why we can use bottom 2 bits of the call address
53	*/	53	*/
54	#define IPC_CALLID_ANSWERED 1 /*< Type of this msg is 'answer' /	54	#define IPC_CALLID_ANSWERED 1 /*< Type of this msg is 'answer' /
55	#define IPC_CALLID_NOTIFICATION 2 /*< Type of this msg is 'notification' /	55	#define IPC_CALLID_NOTIFICATION 2 /*< Type of this msg is 'notification' /
56		56
57	/* Return values from IPC_ASYNC */	57	/* Return values from IPC_ASYNC */
58	#define IPC_CALLRET_FATAL -1	58	#define IPC_CALLRET_FATAL -1
59	#define IPC_CALLRET_TEMPORARY -2	59	#define IPC_CALLRET_TEMPORARY -2
60		60
61		61
62	/* Macros for manipulating calling data */	62	/* Macros for manipulating calling data */
63	#define IPC_SET_RETVAL(data, retval) ((data).args[0] = (retval))	63	#define IPC_SET_RETVAL(data, retval) ((data).args[0] = (retval))
64	#define IPC_SET_METHOD(data, val) ((data).args[0] = (val))	64	#define IPC_SET_METHOD(data, val) ((data).args[0] = (val))
65	#define IPC_SET_ARG1(data, val) ((data).args[1] = (val))	65	#define IPC_SET_ARG1(data, val) ((data).args[1] = (val))
66	#define IPC_SET_ARG2(data, val) ((data).args[2] = (val))	66	#define IPC_SET_ARG2(data, val) ((data).args[2] = (val))
67	#define IPC_SET_ARG3(data, val) ((data).args[3] = (val))	67	#define IPC_SET_ARG3(data, val) ((data).args[3] = (val))
68		68
69	#define IPC_GET_METHOD(data) ((data).args[0])	69	#define IPC_GET_METHOD(data) ((data).args[0])
70	#define IPC_GET_RETVAL(data) ((data).args[0])	70	#define IPC_GET_RETVAL(data) ((data).args[0])
71		71
72	#define IPC_GET_ARG1(data) ((data).args[1])	72	#define IPC_GET_ARG1(data) ((data).args[1])
73	#define IPC_GET_ARG2(data) ((data).args[2])	73	#define IPC_GET_ARG2(data) ((data).args[2])
74	#define IPC_GET_ARG3(data) ((data).args[3])	74	#define IPC_GET_ARG3(data) ((data).args[3])
75		75
76	/* Well known phone descriptors */	76	/* Well known phone descriptors */
77	#define PHONE_NS 0	77	#define PHONE_NS 0
78		78
79	/* System-specific methods - only through special syscalls	79	/* System-specific methods - only through special syscalls
80	* These methods have special behaviour	80	* These methods have special behaviour
81	*/	81	*/
82	/** Protocol for CONNECT - TO - ME	82	/** Protocol for CONNECT - TO - ME
83	*	83	*
84	* Calling process asks the callee to create a callback connection,	84	* Calling process asks the callee to create a callback connection,
85	* so that it can start initiating new messages.	85	* so that it can start initiating new messages.
86	*	86	*
87	* The protocol for negotiating is:	87	* The protocol for negotiating is:
88	* - sys_connect_to_me - sends a message IPC_M_CONNECTTOME	88	* - sys_connect_to_me - sends a message IPC_M_CONNECTTOME
89	* - sys_wait_for_call - upon receipt tries to allocate new phone	89	* - sys_wait_for_call - upon receipt tries to allocate new phone
90	* - if it fails, responds with ELIMIT	90	* - if it fails, responds with ELIMIT
91	* - passes call to userspace. If userspace	91	* - passes call to userspace. If userspace
92	* responds with error, phone is deallocated and	92	* responds with error, phone is deallocated and
93	* error is sent back to caller. Otherwise	93	* error is sent back to caller. Otherwise
94	* the call is accepted and the response is sent back.	94	* the call is accepted and the response is sent back.
95	* - the allocated phoneid is passed to userspace	95	* - the allocated phoneid is passed to userspace
96	* (on the receiving sid) as ARG3 of the call.	96	* (on the receiving sid) as ARG3 of the call.
97	* - the caller obtains taskid of the called thread	97	* - the caller obtains taskid of the called thread
98	*/	98	*/
99	#define IPC_M_CONNECT_TO_ME 1	99	#define IPC_M_CONNECT_TO_ME 1
100	/** Protocol for CONNECT - ME - TO	100	/** Protocol for CONNECT - ME - TO
101	*	101	*
102	* Calling process asks the callee to create for him a new connection.	102	* Calling process asks the callee to create for him a new connection.
103	* E.g. the caller wants a name server to connect him to print server.	103	* E.g. the caller wants a name server to connect him to print server.
104	*	104	*
105	* The protocol for negotiating is:	105	* The protocol for negotiating is:
106	* - sys_connect_me_to - send a synchronous message to name server	106	* - sys_connect_me_to - send a synchronous message to name server
107	* indicating that it wants to be connected to some	107	* indicating that it wants to be connected to some
108	* service	108	* service
109	* - arg1/2 are user specified, arg3 contains	109	* - arg1/2 are user specified, arg3 contains
110	* address of the phone that should be connected	110	* address of the phone that should be connected
111	* (TODO: it leaks to userspace)	111	* (TODO: it leaks to userspace)
112	* recipient - if ipc_answer == 0, then accept connection	112	* recipient - if ipc_answer == 0, then accept connection
113	* - otherwise connection refused	113	* - otherwise connection refused
114	* - recepient may forward message. Forwarding	114	* - recepient may forward message. Forwarding
115	* system message	115	* system message
116	*	116	*
117	*/	117	*/
118	#define IPC_M_CONNECT_ME_TO 2	118	#define IPC_M_CONNECT_ME_TO 2
119	/** This message is sent to answerbox when the phone	119	/** This message is sent to answerbox when the phone
120	* is hung up	120	* is hung up
121	*/	121	*/
122	#define IPC_M_PHONE_HUNGUP 3	122	#define IPC_M_PHONE_HUNGUP 3
123	/** Interrupt notification */	123	/** Interrupt notification */
124	#define IPC_M_INTERRUPT 4	124	#define IPC_M_INTERRUPT 4
125	/** Send as_area over IPC	125	/** Send as_area over IPC
126	* - ARG2 - src base address	126	* - ARG2 - src base address
127	* - ARG3 - size of src as(filled automatically by kernel)	127	* - ARG3 - size of src as(filled automatically by kernel)
128	* - on answer ARG1 - dst base adress	128	* - on answer ARG1 - dst base adress
129	*/	129	*/
130	#define IPC_M_AS_SEND 5	130	#define IPC_M_AS_AREA_SEND 5
131		131
132		132
133	/* Well-known methods */	133	/* Well-known methods */
134	#define IPC_M_LAST_SYSTEM 511	134	#define IPC_M_LAST_SYSTEM 511
135	#define IPC_M_PING 512	135	#define IPC_M_PING 512
136	/* User methods */	136	/* User methods */
137	#define FIRST_USER_METHOD 1024	137	#define FIRST_USER_METHOD 1024
138		138
139	#ifdef KERNEL	139	#ifdef KERNEL
140		140
141	#include <synch/mutex.h>	141	#include <synch/mutex.h>
142	#include <synch/condvar.h>	142	#include <synch/condvar.h>
143	#include <adt/list.h>	143	#include <adt/list.h>
144		144
145	#define IPC_MAX_PHONES 16	145	#define IPC_MAX_PHONES 16
146		146
147	typedef struct answerbox_s answerbox_t;	147	typedef struct answerbox_s answerbox_t;
148	typedef struct phone_s phone_t;	148	typedef struct phone_s phone_t;
149	typedef struct {	149	typedef struct {
150	__native args[IPC_CALL_LEN];	150	__native args[IPC_CALL_LEN];
151	phone_t *phone;	151	phone_t *phone;
152	}ipc_data_t;	152	}ipc_data_t;
153		153
154	struct answerbox_s {	154	struct answerbox_s {
155	SPINLOCK_DECLARE(lock);	155	SPINLOCK_DECLARE(lock);
156		156
157	task_t *task;	157	task_t *task;
158		158
159	waitq_t wq;	159	waitq_t wq;
160		160
161	link_t connected_phones; /*< Phones connected to this answerbox /	161	link_t connected_phones; /*< Phones connected to this answerbox /
162	link_t calls; /*< Received calls /	162	link_t calls; /*< Received calls /
163	link_t dispatched_calls; /* Should be hash table in the future */	163	link_t dispatched_calls; /* Should be hash table in the future */
164		164
165	link_t answers; /*< Answered calls /	165	link_t answers; /*< Answered calls /
166		166
167	SPINLOCK_DECLARE(irq_lock);	167	SPINLOCK_DECLARE(irq_lock);
168	link_t irq_notifs; /*< Notifications from IRQ handlers /	168	link_t irq_notifs; /*< Notifications from IRQ handlers /
169	};	169	};
170		170
171	typedef enum {	171	typedef enum {
172	IPC_BUSY_FREE = 0,	172	IPC_BUSY_FREE = 0,
173	IPC_BUSY_CONNECTING,	173	IPC_BUSY_CONNECTING,
174	IPC_BUSY_CONNECTED	174	IPC_BUSY_CONNECTED
175	} ipc_busy_t;	175	} ipc_busy_t;
176		176
177	struct phone_s {	177	struct phone_s {
178	SPINLOCK_DECLARE(lock);	178	SPINLOCK_DECLARE(lock);
179	link_t list;	179	link_t list;
180	answerbox_t *callee;	180	answerbox_t *callee;
181	ipc_busy_t busy;	181	ipc_busy_t busy;
182	atomic_t active_calls;	182	atomic_t active_calls;
183	};	183	};
184		184
185	typedef struct {	185	typedef struct {
186	link_t list;	186	link_t list;
187		187
188	int flags;	188	int flags;
189		189
190	/* Identification of the caller */	190	/* Identification of the caller */
191	task_t *sender;	191	task_t *sender;
192	/* The caller box is different from sender->answerbox	192	/* The caller box is different from sender->answerbox
193	* for synchronous calls	193	* for synchronous calls
194	*/	194	*/
195	answerbox_t *callerbox;	195	answerbox_t *callerbox;
196		196
197	__native private; /*< Private data to internal IPC /	197	__native private; /*< Private data to internal IPC /
198		198
199	ipc_data_t data; /*< Data passed from/to userspace /	199	ipc_data_t data; /*< Data passed from/to userspace /
200	}call_t;	200	}call_t;
201		201
202	extern void ipc_init(void);	202	extern void ipc_init(void);
203	extern call_t * ipc_wait_for_call(answerbox_t *box, int flags);	203	extern call_t * ipc_wait_for_call(answerbox_t *box, int flags);
204	extern void ipc_answer(answerbox_t box, call_t request);	204	extern void ipc_answer(answerbox_t box, call_t request);
205	extern int ipc_call(phone_t phone, call_t call);	205	extern int ipc_call(phone_t phone, call_t call);
206	extern void ipc_call_sync(phone_t phone, call_t request);	206	extern void ipc_call_sync(phone_t phone, call_t request);
207	extern void ipc_phone_init(phone_t *phone);	207	extern void ipc_phone_init(phone_t *phone);
208	extern void ipc_phone_connect(phone_t phone, answerbox_t box);	208	extern void ipc_phone_connect(phone_t phone, answerbox_t box);
209	extern void ipc_call_free(call_t *call);	209	extern void ipc_call_free(call_t *call);
210	extern call_t * ipc_call_alloc(int flags);	210	extern call_t * ipc_call_alloc(int flags);
211	extern void ipc_answerbox_init(answerbox_t *box);	211	extern void ipc_answerbox_init(answerbox_t *box);
212	extern void ipc_call_static_init(call_t *call);	212	extern void ipc_call_static_init(call_t *call);
213	extern void task_print_list(void);	213	extern void task_print_list(void);
214	extern int ipc_forward(call_t call, phone_t newphone, answerbox_t *oldbox);	214	extern int ipc_forward(call_t call, phone_t newphone, answerbox_t *oldbox);
215	extern void ipc_cleanup(task_t *task);	215	extern void ipc_cleanup(task_t *task);
216	extern int ipc_phone_hangup(phone_t *phone);	216	extern int ipc_phone_hangup(phone_t *phone);
217	extern void ipc_backsend_err(phone_t phone, call_t call, __native err);	217	extern void ipc_backsend_err(phone_t phone, call_t call, __native err);
218		218
219		219
220	extern answerbox_t *ipc_phone_0;	220	extern answerbox_t *ipc_phone_0;
221		221
222	#endif	222	#endif
223		223
224	#endif	224	#endif
225		225