WebSVN – HelenOS – Diff – /branches/tracing/kernel/generic/include/proc/task.h


/*
 * Copyright (c) 2001-2004 Jakub Jermar
 * 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.
 */
 
/** @addtogroup genericproc
 * @{
 */
/** @file
 */
 
#ifndef KERN_TASK_H_
#define KERN_TASK_H_
 
#include <cpu.h>
#include <ipc/ipc.h>
#include <synch/spinlock.h>
#include <synch/mutex.h>
#include <synch/rwlock.h>
#include <synch/futex.h>
#include <adt/avl.h>
#include <adt/btree.h>
#include <adt/list.h>
#include <security/cap.h>
#include <arch/proc/task.h>
#include <arch/proc/thread.h>
#include <arch/context.h>
#include <arch/fpu_context.h>
#include <arch/cpu.h>
#include <mm/tlb.h>
#include <proc/scheduler.h>
#include <udebug/udebug.h>
 
struct thread;
 
/** Task structure. */
typedef struct task {
    /** Task's linkage for the tasks_tree AVL tree. */
    avltree_node_t tasks_tree_node;
   
    /** Task lock.
     *
     * Must be acquired before threads_lock and thread lock of any of its
     * threads.
     */
    SPINLOCK_DECLARE(lock);
   
    char *name;
    /** List of threads contained in this task. */
    link_t th_head;
    /** Address space. */
    as_t *as;
    /** Unique identity of task. */
    task_id_t taskid;
    /** Task security context. */
    context_id_t context;  
 
    /** Number of references (i.e. threads). */
    atomic_t refcount;
    /** Number of threads that haven't exited yet. */
    atomic_t lifecount;
 
    /** Task capabilities. */
    cap_t capabilities;
 
    /* IPC stuff */
    answerbox_t answerbox;  /**< Communication endpoint */
    phone_t phones[IPC_MAX_PHONES];
    /**
     * Active asynchronous messages. It is used for limiting uspace to
     * certain extent.
     */
    atomic_t active_calls;
 
    /** Debugging stuff */
    udebug_task_state_t dt_state;
    call_t *debug_begin_call;
    int not_stoppable_count;
    struct task *debugger;
    udebug_evmask_t debug_evmask;
 
    /** Kernel answerbox */
    answerbox_t kernel_box;
    /** Thread used to service kernel answerbox */
    struct thread *kb_thread;
    /** Kbox thread creation vs. begin of cleanup mutual exclusion */
    SPINLOCK_DECLARE(kb_cleanup_lock);
    /** True if cleanup of kbox has already started */
    bool kb_finished;
    /** Used for waiting on kbox thread shutdown */
    waitq_t kb_thread_shutdown_wq;
   
    /** Architecture specific task data. */
    task_arch_t arch;
   
    /**
     * Serializes access to the B+tree of task's futexes. This mutex is
     * independent on the task spinlock.
     */
    mutex_t futexes_lock;
    /** B+tree of futexes referenced by this task. */
    btree_t futexes;   
   
    /** Accumulated accounting. */
    uint64_t cycles;
} task_t;
 
SPINLOCK_EXTERN(tasks_lock);
extern avltree_t tasks_tree;
 
extern void task_init(void);
extern void task_done(void);
extern task_t *task_create(as_t *as, char *name);
extern void task_destroy(task_t *t);
extern task_t *task_run_program(void *program_addr, char *name);
extern task_t *task_find_by_id(task_id_t id);
extern int task_kill(task_id_t id);
extern uint64_t task_get_accounting(task_t *t);
 
extern void cap_set(task_t *t, cap_t caps);
extern cap_t cap_get(task_t *t);
 
#ifndef task_create_arch
extern void task_create_arch(task_t *t);
#endif
 
#ifndef task_destroy_arch
extern void task_destroy_arch(task_t *t);
#endif
 
extern unative_t sys_task_get_id(task_id_t *uspace_task_id);
 
#endif
 
/** @}
 */
 

Rev 2899	Rev 2902
1	/*	1	/*
2	* Copyright (c) 2001-2004 Jakub Jermar	2	* Copyright (c) 2001-2004 Jakub Jermar
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	/** @addtogroup genericproc	29	/** @addtogroup genericproc
30	* @{	30	* @{
31	*/	31	*/
32	/** @file	32	/** @file
33	*/	33	*/
34		34
35	#ifndef KERN_TASK_H_	35	#ifndef KERN_TASK_H_
36	#define KERN_TASK_H_	36	#define KERN_TASK_H_
37		37
38	#include <cpu.h>	38	#include <cpu.h>
39	#include <ipc/ipc.h>	39	#include <ipc/ipc.h>
40	#include <synch/spinlock.h>	40	#include <synch/spinlock.h>
41	#include <synch/mutex.h>	41	#include <synch/mutex.h>
42	#include <synch/rwlock.h>	42	#include <synch/rwlock.h>
43	#include <synch/futex.h>	43	#include <synch/futex.h>
44	#include <adt/avl.h>	44	#include <adt/avl.h>
45	#include <adt/btree.h>	45	#include <adt/btree.h>
46	#include <adt/list.h>	46	#include <adt/list.h>
47	#include <security/cap.h>	47	#include <security/cap.h>
48	#include <arch/proc/task.h>	48	#include <arch/proc/task.h>
49	#include <arch/proc/thread.h>	49	#include <arch/proc/thread.h>
50	#include <arch/context.h>	50	#include <arch/context.h>
51	#include <arch/fpu_context.h>	51	#include <arch/fpu_context.h>
52	#include <arch/cpu.h>	52	#include <arch/cpu.h>
53	#include <mm/tlb.h>	53	#include <mm/tlb.h>
54	#include <proc/scheduler.h>	54	#include <proc/scheduler.h>
55	#include <udebug/udebug.h>	55	#include <udebug/udebug.h>
56		56
57	struct thread;	57	struct thread;
58		58
59	/** Task structure. */	59	/** Task structure. */
60	typedef struct task {	60	typedef struct task {
61	/** Task's linkage for the tasks_tree AVL tree. */	61	/** Task's linkage for the tasks_tree AVL tree. */
62	avltree_node_t tasks_tree_node;	62	avltree_node_t tasks_tree_node;
63		63
64	/** Task lock.	64	/** Task lock.
65	*	65	*
66	* Must be acquired before threads_lock and thread lock of any of its	66	* Must be acquired before threads_lock and thread lock of any of its
67	* threads.	67	* threads.
68	*/	68	*/
69	SPINLOCK_DECLARE(lock);	69	SPINLOCK_DECLARE(lock);
70		70
71	char *name;	71	char *name;
72	/** List of threads contained in this task. */	72	/** List of threads contained in this task. */
73	link_t th_head;	73	link_t th_head;
74	/** Address space. */	74	/** Address space. */
75	as_t *as;	75	as_t *as;
76	/** Unique identity of task. */	76	/** Unique identity of task. */
77	task_id_t taskid;	77	task_id_t taskid;
78	/** Task security context. */	78	/** Task security context. */
79	context_id_t context;	79	context_id_t context;
80		80
81	/** Number of references (i.e. threads). */	81	/** Number of references (i.e. threads). */
82	atomic_t refcount;	82	atomic_t refcount;
83	/** Number of threads that haven't exited yet. */	83	/** Number of threads that haven't exited yet. */
84	atomic_t lifecount;	84	atomic_t lifecount;
85		85
86	/** Task capabilities. */	86	/** Task capabilities. */
87	cap_t capabilities;	87	cap_t capabilities;
88		88
89	/* IPC stuff */	89	/* IPC stuff */
90	answerbox_t answerbox; /*< Communication endpoint /	90	answerbox_t answerbox; /*< Communication endpoint /
91	phone_t phones[IPC_MAX_PHONES];	91	phone_t phones[IPC_MAX_PHONES];
92	/**	92	/**
93	* Active asynchronous messages. It is used for limiting uspace to	93	* Active asynchronous messages. It is used for limiting uspace to
94	* certain extent.	94	* certain extent.
95	*/	95	*/
96	atomic_t active_calls;	96	atomic_t active_calls;
97		97
98	/** Debugging stuff */	98	/** Debugging stuff */
99	udebug_task_state_t dt_state;	99	udebug_task_state_t dt_state;
100	call_t *debug_begin_call;	100	call_t *debug_begin_call;
101	int not_stoppable_count;	101	int not_stoppable_count;
102	struct task *debugger;	102	struct task *debugger;
103	udebug_evmask_t debug_evmask;	103	udebug_evmask_t debug_evmask;
104		104
105	/** Kernel answerbox */	105	/** Kernel answerbox */
106	answerbox_t kernel_box;	106	answerbox_t kernel_box;
107	/** Thread used to service kernel answerbox */	107	/** Thread used to service kernel answerbox */
108	struct thread *kb_thread;	108	struct thread *kb_thread;
-		109	/** Kbox thread creation vs. begin of cleanup mutual exclusion */
-		110	SPINLOCK_DECLARE(kb_cleanup_lock);
109	/** True if kb_thread != NULL or is being prepared */	111	/** True if cleanup of kbox has already started */
-		112	bool kb_finished;
-		113	/** Used for waiting on kbox thread shutdown */
110	bool kb_thread_at_hand;	114	waitq_t kb_thread_shutdown_wq;
111		115
112	/** Architecture specific task data. */	116	/** Architecture specific task data. */
113	task_arch_t arch;	117	task_arch_t arch;
114		118
115	/**	119	/**
116	* Serializes access to the B+tree of task's futexes. This mutex is	120	* Serializes access to the B+tree of task's futexes. This mutex is
117	* independent on the task spinlock.	121	* independent on the task spinlock.
118	*/	122	*/
119	mutex_t futexes_lock;	123	mutex_t futexes_lock;
120	/** B+tree of futexes referenced by this task. */	124	/** B+tree of futexes referenced by this task. */
121	btree_t futexes;	125	btree_t futexes;
122		126
123	/** Accumulated accounting. */	127	/** Accumulated accounting. */
124	uint64_t cycles;	128	uint64_t cycles;
125	} task_t;	129	} task_t;
126		130
127	SPINLOCK_EXTERN(tasks_lock);	131	SPINLOCK_EXTERN(tasks_lock);
128	extern avltree_t tasks_tree;	132	extern avltree_t tasks_tree;
129		133
130	extern void task_init(void);	134	extern void task_init(void);
131	extern void task_done(void);	135	extern void task_done(void);
132	extern task_t task_create(as_t as, char *name);	136	extern task_t task_create(as_t as, char *name);
133	extern void task_destroy(task_t *t);	137	extern void task_destroy(task_t *t);
134	extern task_t task_run_program(void program_addr, char *name);	138	extern task_t task_run_program(void program_addr, char *name);
135	extern task_t *task_find_by_id(task_id_t id);	139	extern task_t *task_find_by_id(task_id_t id);
136	extern int task_kill(task_id_t id);	140	extern int task_kill(task_id_t id);
137	extern uint64_t task_get_accounting(task_t *t);	141	extern uint64_t task_get_accounting(task_t *t);
138		142
139	extern void cap_set(task_t *t, cap_t caps);	143	extern void cap_set(task_t *t, cap_t caps);
140	extern cap_t cap_get(task_t *t);	144	extern cap_t cap_get(task_t *t);
141		145
142	#ifndef task_create_arch	146	#ifndef task_create_arch
143	extern void task_create_arch(task_t *t);	147	extern void task_create_arch(task_t *t);
144	#endif	148	#endif
145		149
146	#ifndef task_destroy_arch	150	#ifndef task_destroy_arch
147	extern void task_destroy_arch(task_t *t);	151	extern void task_destroy_arch(task_t *t);
148	#endif	152	#endif
149		153
150	extern unative_t sys_task_get_id(task_id_t *uspace_task_id);	154	extern unative_t sys_task_get_id(task_id_t *uspace_task_id);
151		155
152	#endif	156	#endif
153		157
154	/** @}	158	/** @}
155	*/	159	*/
156		160

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(root)/branches/tracing/kernel/generic/include/proc/task.h – Rev 2899 → 2902