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 */
#ifdef CONFIG_DEBUG
# define IPC_MAX_ASYNC_CALLS  4
#else
# define IPC_MAX_ASYNC_CALLS  4000
#endif
 
/* 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 answer */
#define IPC_CALL_NOTIF          (1<<5) /* Interrupt notification */
 
/* 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
 
 
 
/** Send as_area over IPC
 * - ARG1 - src base address
 * - ARG2 - size of src as(filled automatically by kernel)
 * - ARG3 - flags of the area being sent
 * - on answer ARG1 - dst base adress
 */
#define IPC_M_AS_AREA_SEND      5
 
/** Get as_area over IPC
 * - ARG1 - Where the area will be mapped
 * - ARG2 - Expected size of area
 * - ARG3 - User defined argument
 * on answer - the server sets ARG1 as src as address of the as_area
 * to be shared, ARG2 is set to rights that will be used for sharing,
 * which is returned as part of answer back to the receiver
 */
#define IPC_M_AS_AREA_RECV      6
 
 
/* 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_PHONE_FREE = 0,     /**< Phone is free and can be allocated */
    IPC_PHONE_CONNECTING,   /**< Phone is connecting somewhere */
    IPC_PHONE_CONNECTED,    /**< Phone is connected */
    IPC_PHONE_HUNGUP,  /**< Phone is hung up, waiting for answers to come */
    IPC_PHONE_SLAMMED       /**< Phone was hungup from server */
} ipc_phone_state_t;
 
/** Structure identifying phone (in TASK structure) */
struct phone_s {
    SPINLOCK_DECLARE(lock);
    link_t link;
    answerbox_t *callee;
    ipc_phone_state_t state;
    atomic_t active_calls;
};
 
typedef struct {
    link_t link;
 
    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, __u32 usec, 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);
void ipc_cleanup(void);
int ipc_phone_hangup(phone_t *phone);
extern void ipc_backsend_err(phone_t *phone, call_t *call, __native err);
extern void ipc_print_task(task_id_t taskid);
 
extern answerbox_t *ipc_phone_0;
 
#endif
 
#endif
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/include/ipc/ipc.h – Rev 1643 → 1693

Rev 1643		Rev 1693
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	#ifdef CONFIG_DEBUG	37	#ifdef CONFIG_DEBUG
38	# define IPC_MAX_ASYNC_CALLS 4	38	# define IPC_MAX_ASYNC_CALLS 4
39	#else	39	#else
40	# define IPC_MAX_ASYNC_CALLS 4000	40	# define IPC_MAX_ASYNC_CALLS 4000
41	#endif	41	#endif
42		42
43	/* Flags for calls */	43	/* Flags for calls */
44	#define IPC_CALL_ANSWERED (1<<0) /*< This is answer to a call /	44	#define IPC_CALL_ANSWERED (1<<0) /*< This is answer to a call /
45	#define IPC_CALL_STATIC_ALLOC (1<<1) /*< This call will not be freed on error /	45	#define IPC_CALL_STATIC_ALLOC (1<<1) /*< This call will not be freed on error /
46	#define IPC_CALL_DISCARD_ANSWER (1<<2) /**< Answer will not be passed to	46	#define IPC_CALL_DISCARD_ANSWER (1<<2) /**< Answer will not be passed to
47	* userspace, will be discarded */	47	* userspace, will be discarded */
48	#define IPC_CALL_FORWARDED (1<<3) /* Call was forwarded */	48	#define IPC_CALL_FORWARDED (1<<3) /* Call was forwarded */
49	#define IPC_CALL_CONN_ME_TO (1<<4) /* Identify connect_me_to answer */	49	#define IPC_CALL_CONN_ME_TO (1<<4) /* Identify connect_me_to answer */
50	#define IPC_CALL_NOTIF (1<<5) /* Interrupt notification */	50	#define IPC_CALL_NOTIF (1<<5) /* Interrupt notification */
51		51
52	/* Flags of callid (the addresses are aligned at least to 4,	52	/* Flags of callid (the addresses are aligned at least to 4,
53	* that is why we can use bottom 2 bits of the call address	53	* that is why we can use bottom 2 bits of the call address
54	*/	54	*/
55	#define IPC_CALLID_ANSWERED 1 /*< Type of this msg is 'answer' /	55	#define IPC_CALLID_ANSWERED 1 /*< Type of this msg is 'answer' /
56	#define IPC_CALLID_NOTIFICATION 2 /*< Type of this msg is 'notification' /	56	#define IPC_CALLID_NOTIFICATION 2 /*< Type of this msg is 'notification' /
57		57
58	/* Return values from IPC_ASYNC */	58	/* Return values from IPC_ASYNC */
59	#define IPC_CALLRET_FATAL -1	59	#define IPC_CALLRET_FATAL -1
60	#define IPC_CALLRET_TEMPORARY -2	60	#define IPC_CALLRET_TEMPORARY -2
61		61
62		62
63	/* Macros for manipulating calling data */	63	/* Macros for manipulating calling data */
64	#define IPC_SET_RETVAL(data, retval) ((data).args[0] = (retval))	64	#define IPC_SET_RETVAL(data, retval) ((data).args[0] = (retval))
65	#define IPC_SET_METHOD(data, val) ((data).args[0] = (val))	65	#define IPC_SET_METHOD(data, val) ((data).args[0] = (val))
66	#define IPC_SET_ARG1(data, val) ((data).args[1] = (val))	66	#define IPC_SET_ARG1(data, val) ((data).args[1] = (val))
67	#define IPC_SET_ARG2(data, val) ((data).args[2] = (val))	67	#define IPC_SET_ARG2(data, val) ((data).args[2] = (val))
68	#define IPC_SET_ARG3(data, val) ((data).args[3] = (val))	68	#define IPC_SET_ARG3(data, val) ((data).args[3] = (val))
69		69
70	#define IPC_GET_METHOD(data) ((data).args[0])	70	#define IPC_GET_METHOD(data) ((data).args[0])
71	#define IPC_GET_RETVAL(data) ((data).args[0])	71	#define IPC_GET_RETVAL(data) ((data).args[0])
72		72
73	#define IPC_GET_ARG1(data) ((data).args[1])	73	#define IPC_GET_ARG1(data) ((data).args[1])
74	#define IPC_GET_ARG2(data) ((data).args[2])	74	#define IPC_GET_ARG2(data) ((data).args[2])
75	#define IPC_GET_ARG3(data) ((data).args[3])	75	#define IPC_GET_ARG3(data) ((data).args[3])
76		76
77	/* Well known phone descriptors */	77	/* Well known phone descriptors */
78	#define PHONE_NS 0	78	#define PHONE_NS 0
79		79
80	/* System-specific methods - only through special syscalls	80	/* System-specific methods - only through special syscalls
81	* These methods have special behaviour	81	* These methods have special behaviour
82	*/	82	*/
83	/** Protocol for CONNECT - TO - ME	83	/** Protocol for CONNECT - TO - ME
84	*	84	*
85	* Calling process asks the callee to create a callback connection,	85	* Calling process asks the callee to create a callback connection,
86	* so that it can start initiating new messages.	86	* so that it can start initiating new messages.
87	*	87	*
88	* The protocol for negotiating is:	88	* The protocol for negotiating is:
89	* - sys_connect_to_me - sends a message IPC_M_CONNECTTOME	89	* - sys_connect_to_me - sends a message IPC_M_CONNECTTOME
90	* - sys_wait_for_call - upon receipt tries to allocate new phone	90	* - sys_wait_for_call - upon receipt tries to allocate new phone
91	* - if it fails, responds with ELIMIT	91	* - if it fails, responds with ELIMIT
92	* - passes call to userspace. If userspace	92	* - passes call to userspace. If userspace
93	* responds with error, phone is deallocated and	93	* responds with error, phone is deallocated and
94	* error is sent back to caller. Otherwise	94	* error is sent back to caller. Otherwise
95	* the call is accepted and the response is sent back.	95	* the call is accepted and the response is sent back.
96	* - the allocated phoneid is passed to userspace	96	* - the allocated phoneid is passed to userspace
97	* (on the receiving sid) as ARG3 of the call.	97	* (on the receiving sid) as ARG3 of the call.
98	* - the caller obtains taskid of the called thread	98	* - the caller obtains taskid of the called thread
99	*/	99	*/
100	#define IPC_M_CONNECT_TO_ME 1	100	#define IPC_M_CONNECT_TO_ME 1
101	/** Protocol for CONNECT - ME - TO	101	/** Protocol for CONNECT - ME - TO
102	*	102	*
103	* Calling process asks the callee to create for him a new connection.	103	* Calling process asks the callee to create for him a new connection.
104	* E.g. the caller wants a name server to connect him to print server.	104	* E.g. the caller wants a name server to connect him to print server.
105	*	105	*
106	* The protocol for negotiating is:	106	* The protocol for negotiating is:
107	* - sys_connect_me_to - send a synchronous message to name server	107	* - sys_connect_me_to - send a synchronous message to name server
108	* indicating that it wants to be connected to some	108	* indicating that it wants to be connected to some
109	* service	109	* service
110	* - arg1/2 are user specified, arg3 contains	110	* - arg1/2 are user specified, arg3 contains
111	* address of the phone that should be connected	111	* address of the phone that should be connected
112	* (TODO: it leaks to userspace)	112	* (TODO: it leaks to userspace)
113	* recipient - if ipc_answer == 0, then accept connection	113	* recipient - if ipc_answer == 0, then accept connection
114	* - otherwise connection refused	114	* - otherwise connection refused
115	* - recepient may forward message. Forwarding	115	* - recepient may forward message. Forwarding
116	* system message	116	* system message
117	*	117	*
118	*/	118	*/
119	#define IPC_M_CONNECT_ME_TO 2	119	#define IPC_M_CONNECT_ME_TO 2
120	/** This message is sent to answerbox when the phone	120	/** This message is sent to answerbox when the phone
121	* is hung up	121	* is hung up
122	*/	122	*/
123	#define IPC_M_PHONE_HUNGUP 3	123	#define IPC_M_PHONE_HUNGUP 3
124	/** Interrupt notification */	-
125	#define IPC_M_INTERRUPT 4	-
126		124
127	/** Send as_area over IPC	125	/** Send as_area over IPC
128	* - ARG1 - src base address	126	* - ARG1 - src base address
129	* - ARG2 - size of src as(filled automatically by kernel)	127	* - ARG2 - size of src as(filled automatically by kernel)
130	* - ARG3 - flags of the area being sent	128	* - ARG3 - flags of the area being sent
131	* - on answer ARG1 - dst base adress	129	* - on answer ARG1 - dst base adress
132	*/	130	*/
133	#define IPC_M_AS_AREA_SEND 5	131	#define IPC_M_AS_AREA_SEND 5
134		132
135	/** Get as_area over IPC	133	/** Get as_area over IPC
136	* - ARG1 - Where the area will be mapped	134	* - ARG1 - Where the area will be mapped
137	* - ARG2 - Expected size of area	135	* - ARG2 - Expected size of area
138	* - ARG3 - User defined argument	136	* - ARG3 - User defined argument
139	* on answer - the server sets ARG1 as src as address of the as_area	137	* on answer - the server sets ARG1 as src as address of the as_area
140	* to be shared, ARG2 is set to rights that will be used for sharing,	138	* to be shared, ARG2 is set to rights that will be used for sharing,
141	* which is returned as part of answer back to the receiver	139	* which is returned as part of answer back to the receiver
142	*/	140	*/
143	#define IPC_M_AS_AREA_RECV 6	141	#define IPC_M_AS_AREA_RECV 6
144		142
145		143
146	/* Well-known methods */	144	/* Well-known methods */
147	#define IPC_M_LAST_SYSTEM 511	145	#define IPC_M_LAST_SYSTEM 511
148	#define IPC_M_PING 512	146	#define IPC_M_PING 512
149	/* User methods */	147	/* User methods */
150	#define FIRST_USER_METHOD 1024	148	#define FIRST_USER_METHOD 1024
151		149
152	#ifdef KERNEL	150	#ifdef KERNEL
153		151
154	#include <synch/mutex.h>	152	#include <synch/mutex.h>
155	#include <synch/condvar.h>	153	#include <synch/condvar.h>
156	#include <adt/list.h>	154	#include <adt/list.h>
157		155
158	#define IPC_MAX_PHONES 16	156	#define IPC_MAX_PHONES 16
159		157
160	typedef struct answerbox_s answerbox_t;	158	typedef struct answerbox_s answerbox_t;
161	typedef struct phone_s phone_t;	159	typedef struct phone_s phone_t;
162	typedef struct {	160	typedef struct {
163	__native args[IPC_CALL_LEN];	161	__native args[IPC_CALL_LEN];
164	phone_t *phone;	162	phone_t *phone;
165	}ipc_data_t;	163	}ipc_data_t;
166		164
167	struct answerbox_s {	165	struct answerbox_s {
168	SPINLOCK_DECLARE(lock);	166	SPINLOCK_DECLARE(lock);
169		167
170	task_t *task;	168	task_t *task;
171		169
172	waitq_t wq;	170	waitq_t wq;
173		171
174	link_t connected_phones; /*< Phones connected to this answerbox /	172	link_t connected_phones; /*< Phones connected to this answerbox /
175	link_t calls; /*< Received calls /	173	link_t calls; /*< Received calls /
176	link_t dispatched_calls; /* Should be hash table in the future */	174	link_t dispatched_calls; /* Should be hash table in the future */
177		175
178	link_t answers; /*< Answered calls /	176	link_t answers; /*< Answered calls /
179		177
180	SPINLOCK_DECLARE(irq_lock);	178	SPINLOCK_DECLARE(irq_lock);
181	link_t irq_notifs; /*< Notifications from IRQ handlers /	179	link_t irq_notifs; /*< Notifications from IRQ handlers /
182	};	180	};
183		181
184	typedef enum {	182	typedef enum {
185	IPC_PHONE_FREE = 0, /*< Phone is free and can be allocated /	183	IPC_PHONE_FREE = 0, /*< Phone is free and can be allocated /
186	IPC_PHONE_CONNECTING, /*< Phone is connecting somewhere /	184	IPC_PHONE_CONNECTING, /*< Phone is connecting somewhere /
187	IPC_PHONE_CONNECTED, /*< Phone is connected /	185	IPC_PHONE_CONNECTED, /*< Phone is connected /
188	IPC_PHONE_HUNGUP, /*< Phone is hung up, waiting for answers to come /	186	IPC_PHONE_HUNGUP, /*< Phone is hung up, waiting for answers to come /
189	IPC_PHONE_SLAMMED /*< Phone was hungup from server /	187	IPC_PHONE_SLAMMED /*< Phone was hungup from server /
190	} ipc_phone_state_t;	188	} ipc_phone_state_t;
191		189
192	/** Structure identifying phone (in TASK structure) */	190	/** Structure identifying phone (in TASK structure) */
193	struct phone_s {	191	struct phone_s {
194	SPINLOCK_DECLARE(lock);	192	SPINLOCK_DECLARE(lock);
195	link_t link;	193	link_t link;
196	answerbox_t *callee;	194	answerbox_t *callee;
197	ipc_phone_state_t state;	195	ipc_phone_state_t state;
198	atomic_t active_calls;	196	atomic_t active_calls;
199	};	197	};
200		198
201	typedef struct {	199	typedef struct {
202	link_t link;	200	link_t link;
203		201
204	int flags;	202	int flags;
205		203
206	/* Identification of the caller */	204	/* Identification of the caller */
207	task_t *sender;	205	task_t *sender;
208	/* The caller box is different from sender->answerbox	206	/* The caller box is different from sender->answerbox
209	* for synchronous calls	207	* for synchronous calls
210	*/	208	*/
211	answerbox_t *callerbox;	209	answerbox_t *callerbox;
212		210
213	__native private; /*< Private data to internal IPC /	211	__native private; /*< Private data to internal IPC /
214		212
215	ipc_data_t data; /*< Data passed from/to userspace /	213	ipc_data_t data; /*< Data passed from/to userspace /
216	}call_t;	214	}call_t;
217		215
218	extern void ipc_init(void);	216	extern void ipc_init(void);
219	extern call_t * ipc_wait_for_call(answerbox_t *box, __u32 usec, int flags);	217	extern call_t * ipc_wait_for_call(answerbox_t *box, __u32 usec, int flags);
220	extern void ipc_answer(answerbox_t box, call_t request);	218	extern void ipc_answer(answerbox_t box, call_t request);
221	extern int ipc_call(phone_t phone, call_t call);	219	extern int ipc_call(phone_t phone, call_t call);
222	extern void ipc_call_sync(phone_t phone, call_t request);	220	extern void ipc_call_sync(phone_t phone, call_t request);
223	extern void ipc_phone_init(phone_t *phone);	221	extern void ipc_phone_init(phone_t *phone);
224	extern void ipc_phone_connect(phone_t phone, answerbox_t box);	222	extern void ipc_phone_connect(phone_t phone, answerbox_t box);
225	extern void ipc_call_free(call_t *call);	223	extern void ipc_call_free(call_t *call);
226	extern call_t * ipc_call_alloc(int flags);	224	extern call_t * ipc_call_alloc(int flags);
227	extern void ipc_answerbox_init(answerbox_t *box);	225	extern void ipc_answerbox_init(answerbox_t *box);
228	extern void ipc_call_static_init(call_t *call);	226	extern void ipc_call_static_init(call_t *call);
229	extern void task_print_list(void);	227	extern void task_print_list(void);
230	extern int ipc_forward(call_t call, phone_t newphone, answerbox_t *oldbox);	228	extern int ipc_forward(call_t call, phone_t newphone, answerbox_t *oldbox);
231	void ipc_cleanup(void);	229	void ipc_cleanup(void);
232	int ipc_phone_hangup(phone_t *phone);	230	int ipc_phone_hangup(phone_t *phone);
233	extern void ipc_backsend_err(phone_t phone, call_t call, __native err);	231	extern void ipc_backsend_err(phone_t phone, call_t call, __native err);
234	extern void ipc_print_task(task_id_t taskid);	232	extern void ipc_print_task(task_id_t taskid);
235		233
236	extern answerbox_t *ipc_phone_0;	234	extern answerbox_t *ipc_phone_0;
237		235
238	#endif	236	#endif
239		237
240	#endif	238	#endif
241		239