WebSVN – HelenOS – Diff – /trunk/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 <synch/spinlock.h>
#include <synch/mutex.h>
#include <synch/rwlock.h>
#include <synch/futex.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>
 
#define IPC_MAX_PHONES  16
#define THREAD_NAME_BUFLEN  20
 
struct answerbox;
struct task;
struct thread;
 
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) */
typedef struct {
    SPINLOCK_DECLARE(lock);
    link_t link;
    struct answerbox *callee;
    ipc_phone_state_t state;
    atomic_t active_calls;
} phone_t;
 
typedef struct answerbox {
    SPINLOCK_DECLARE(lock);
 
    struct task *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 */
    link_t irq_head;        /**< IRQs with notifications to this answerbox. */
} answerbox_t;
 
/** Task structure. */
typedef struct task {
    /** Task lock.
     *
     * Must be acquired before threads_lock and thread lock of any of its threads.
     */
    SPINLOCK_DECLARE(lock);
   
    char *name;
    struct thread *main_thread; /**< Pointer to the main thread. */
    link_t th_head;     /**< List of threads contained in this task. */
    as_t *as;       /**< Address space. */
    task_id_t taskid;   /**< Unique identity of task */
    context_id_t context;   /**< Task security context */
 
    /** If this is true, new threads can become part of the task. */
    bool accept_new_threads;
 
    count_t refcount;   /**< Number of references (i.e. threads). */
 
    cap_t capabilities; /**< Task capabilities. */
 
    /* IPC stuff */
    answerbox_t answerbox;  /**< Communication endpoint */
    phone_t phones[IPC_MAX_PHONES];
    atomic_t active_calls;  /**< Active asynchronous messages.
                 *   It is used for limiting uspace to
                 *   certain extent. */
   
    task_arch_t arch;   /**< Architecture specific task data. */
   
    /**
     * Serializes access to the B+tree of task's futexes. This mutex is
     * independent on the task spinlock.
     */
    mutex_t futexes_lock;
    btree_t futexes;    /**< B+tree of futexes referenced by this task. */
   
    uint64_t cycles;    /**< Accumulated accounting. */
} task_t;
 
typedef void (* timeout_handler_t)(void *arg);
 
typedef struct {
    SPINLOCK_DECLARE(lock);
 
    link_t link;            /**< Link to the list of active timeouts on THE->cpu */
   
    uint64_t ticks;         /**< Timeout will be activated in this amount of clock() ticks. */
 
    timeout_handler_t handler;  /**< Function that will be called on timeout activation. */
    void *arg;          /**< Argument to be passed to handler() function. */
   
    cpu_t *cpu;         /**< On which processor is this timeout registered. */
} timeout_t;
 
/** Thread states. */
typedef enum {
    Invalid,    /**< It is an error, if thread is found in this state. */
    Running,    /**< State of a thread that is currently executing on some CPU. */
    Sleeping,   /**< Thread in this state is waiting for an event. */
    Ready,      /**< State of threads in a run queue. */
    Entering,   /**< Threads are in this state before they are first readied. */
    Exiting,    /**< After a thread calls thread_exit(), it is put into Exiting state. */
    Undead      /**< Threads that were not detached but exited are in the Undead state. */
} state_t;
 
/** Join types. */
typedef enum {
    None,
    TaskClnp,   /**< The thread will be joined by ktaskclnp thread. */
    TaskGC      /**< The thread will be joined by ktaskgc thread. */
} thread_join_type_t;
 
/** Thread structure. There is one per thread. */
typedef struct thread {
    link_t rq_link;             /**< Run queue link. */
    link_t wq_link;             /**< Wait queue link. */
    link_t th_link;             /**< Links to threads within containing task. */
   
    /** Lock protecting thread structure.
     *
     * Protects the whole thread structure except list links above.
     */
    SPINLOCK_DECLARE(lock);
 
    char name[THREAD_NAME_BUFLEN];
 
    void (* thread_code)(void *);       /**< Function implementing the thread. */
    void *thread_arg;           /**< Argument passed to thread_code() function. */
 
    /** From here, the stored context is restored when the thread is scheduled. */
    context_t saved_context;
    /** From here, the stored timeout context is restored when sleep times out. */
    context_t sleep_timeout_context;
    /** From here, the stored interruption context is restored when sleep is interrupted. */
    context_t sleep_interruption_context;
 
    bool sleep_interruptible;       /**< If true, the thread can be interrupted from sleep. */
    waitq_t *sleep_queue;           /**< Wait queue in which this thread sleeps. */
    timeout_t sleep_timeout;        /**< Timeout used for timeoutable sleeping.  */
    volatile int timeout_pending;       /**< Flag signalling sleep timeout in progress. */
 
    /** True if this thread is executing copy_from_uspace(). False otherwise. */
    bool in_copy_from_uspace;
    /** True if this thread is executing copy_to_uspace(). False otherwise. */
    bool in_copy_to_uspace;
   
    /**
     * If true, the thread will not go to sleep at all and will
     * call thread_exit() before returning to userspace.
     */
    bool interrupted;          
   
    thread_join_type_t  join_type;  /**< Who joinins the thread. */
    bool detached;              /**< If true, thread_join_timeout() cannot be used on this thread. */
    waitq_t join_wq;            /**< Waitq for thread_join_timeout(). */
 
    fpu_context_t *saved_fpu_context;
    int fpu_context_exists;
 
    /*
     * Defined only if thread doesn't run.
     * It means that fpu context is in CPU that last time executes this thread.
     * This disables migration.
     */
    int fpu_context_engaged;
 
    rwlock_type_t rwlock_holder_type;
 
    void (* call_me)(void *);       /**< Funtion to be called in scheduler before the thread is put asleep. */
    void *call_me_with;         /**< Argument passed to call_me(). */
 
    state_t state;              /**< Thread's state. */
    int flags;              /**< Thread's flags. */
   
    cpu_t *cpu;             /**< Thread's CPU. */
    task_t *task;               /**< Containing task. */
 
    uint64_t ticks;             /**< Ticks before preemption. */
   
    uint64_t cycles;            /**< Thread accounting. */
    uint64_t last_cycle;        /**< Last sampled cycle. */
    bool uncounted;             /**< Thread doesn't affect accumulated accounting. */
 
    int priority;               /**< Thread's priority. Implemented as index to CPU->rq */
    uint32_t tid;               /**< Thread ID. */
   
    thread_arch_t arch;         /**< Architecture-specific data. */
 
    uint8_t *kstack;            /**< Thread's kernel stack. */
} thread_t;
 
SPINLOCK_EXTERN(tasks_lock);
extern btree_t tasks_btree;
 
extern void task_init(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 2092	Rev 2093
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 <synch/spinlock.h>	39	#include <synch/spinlock.h>
40	#include <synch/mutex.h>	40	#include <synch/mutex.h>
41	#include <synch/rwlock.h>	41	#include <synch/rwlock.h>
42	#include <synch/futex.h>	42	#include <synch/futex.h>
43	#include <adt/btree.h>	43	#include <adt/btree.h>
44	#include <adt/list.h>	44	#include <adt/list.h>
45	#include <security/cap.h>	45	#include <security/cap.h>
46	#include <arch/proc/task.h>	46	#include <arch/proc/task.h>
47	#include <arch/proc/thread.h>	47	#include <arch/proc/thread.h>
48	#include <arch/context.h>	48	#include <arch/context.h>
49	#include <arch/fpu_context.h>	49	#include <arch/fpu_context.h>
50	#include <arch/cpu.h>	50	#include <arch/cpu.h>
51	#include <mm/tlb.h>	51	#include <mm/tlb.h>
52	#include <proc/scheduler.h>	52	#include <proc/scheduler.h>
53		53
54	#define IPC_MAX_PHONES 16	54	#define IPC_MAX_PHONES 16
55	#define THREAD_NAME_BUFLEN 20	55	#define THREAD_NAME_BUFLEN 20
56		56
57	struct answerbox;	57	struct answerbox;
58	struct task;	58	struct task;
59	struct thread;	59	struct thread;
60		60
61	typedef enum {	61	typedef enum {
62	IPC_PHONE_FREE = 0, /*< Phone is free and can be allocated /	62	IPC_PHONE_FREE = 0, /*< Phone is free and can be allocated /
63	IPC_PHONE_CONNECTING, /*< Phone is connecting somewhere /	63	IPC_PHONE_CONNECTING, /*< Phone is connecting somewhere /
64	IPC_PHONE_CONNECTED, /*< Phone is connected /	64	IPC_PHONE_CONNECTED, /*< Phone is connected /
65	IPC_PHONE_HUNGUP, /*< Phone is hung up, waiting for answers to come /	65	IPC_PHONE_HUNGUP, /*< Phone is hung up, waiting for answers to come /
66	IPC_PHONE_SLAMMED /*< Phone was hungup from server /	66	IPC_PHONE_SLAMMED /*< Phone was hungup from server /
67	} ipc_phone_state_t;	67	} ipc_phone_state_t;
68		68
69	/** Structure identifying phone (in TASK structure) */	69	/** Structure identifying phone (in TASK structure) */
70	typedef struct {	70	typedef struct {
71	SPINLOCK_DECLARE(lock);	71	SPINLOCK_DECLARE(lock);
72	link_t link;	72	link_t link;
73	struct answerbox *callee;	73	struct answerbox *callee;
74	ipc_phone_state_t state;	74	ipc_phone_state_t state;
75	atomic_t active_calls;	75	atomic_t active_calls;
76	} phone_t;	76	} phone_t;
77		77
78	typedef struct answerbox {	78	typedef struct answerbox {
79	SPINLOCK_DECLARE(lock);	79	SPINLOCK_DECLARE(lock);
80		80
81	struct task *task;	81	struct task *task;
82		82
83	waitq_t wq;	83	waitq_t wq;
84		84
85	link_t connected_phones; /*< Phones connected to this answerbox /	85	link_t connected_phones; /*< Phones connected to this answerbox /
86	link_t calls; /*< Received calls /	86	link_t calls; /*< Received calls /
87	link_t dispatched_calls; /* Should be hash table in the future */	87	link_t dispatched_calls; /* Should be hash table in the future */
88		88
89	link_t answers; /*< Answered calls /	89	link_t answers; /*< Answered calls /
90		90
91	SPINLOCK_DECLARE(irq_lock);	91	SPINLOCK_DECLARE(irq_lock);
92	link_t irq_notifs; /*< Notifications from IRQ handlers /	92	link_t irq_notifs; /*< Notifications from IRQ handlers /
93	link_t irq_head; /*< IRQs with notifications to this answerbox. /	93	link_t irq_head; /*< IRQs with notifications to this answerbox. /
94	} answerbox_t;	94	} answerbox_t;
95		95
96	/** Task structure. */	96	/** Task structure. */
97	typedef struct task {	97	typedef struct task {
98	/** Task lock.	98	/** Task lock.
99	*	99	*
100	* Must be acquired before threads_lock and thread lock of any of its threads.	100	* Must be acquired before threads_lock and thread lock of any of its threads.
101	*/	101	*/
102	SPINLOCK_DECLARE(lock);	102	SPINLOCK_DECLARE(lock);
103		103
104	char *name;	104	char *name;
105	struct thread main_thread; /< Pointer to the main thread. /	105	struct thread main_thread; /< Pointer to the main thread. /
106	link_t th_head; /*< List of threads contained in this task. /	106	link_t th_head; /*< List of threads contained in this task. /
107	as_t as; /< Address space. /	107	as_t as; /< Address space. /
108	task_id_t taskid; /*< Unique identity of task /	108	task_id_t taskid; /*< Unique identity of task /
109	context_id_t context; /*< Task security context /	109	context_id_t context; /*< Task security context /
110		110
111	/** If this is true, new threads can become part of the task. */	111	/** If this is true, new threads can become part of the task. */
112	bool accept_new_threads;	112	bool accept_new_threads;
113		113
114	count_t refcount; /*< Number of references (i.e. threads). /	114	count_t refcount; /*< Number of references (i.e. threads). /
115		115
116	cap_t capabilities; /*< Task capabilities. /	116	cap_t capabilities; /*< Task capabilities. /
117		117
118	/* IPC stuff */	118	/* IPC stuff */
119	answerbox_t answerbox; /*< Communication endpoint /	119	answerbox_t answerbox; /*< Communication endpoint /
120	phone_t phones[IPC_MAX_PHONES];	120	phone_t phones[IPC_MAX_PHONES];
121	atomic_t active_calls; /**< Active asynchronous messages.	121	atomic_t active_calls; /**< Active asynchronous messages.
122	* It is used for limiting uspace to	122	* It is used for limiting uspace to
123	* certain extent. */	123	* certain extent. */
124		124
125	task_arch_t arch; /*< Architecture specific task data. /	125	task_arch_t arch; /*< Architecture specific task data. /
126		126
127	/**	127	/**
128	* Serializes access to the B+tree of task's futexes. This mutex is	128	* Serializes access to the B+tree of task's futexes. This mutex is
129	* independent on the task spinlock.	129	* independent on the task spinlock.
130	*/	130	*/
131	mutex_t futexes_lock;	131	mutex_t futexes_lock;
132	btree_t futexes; /*< B+tree of futexes referenced by this task. /	132	btree_t futexes; /*< B+tree of futexes referenced by this task. /
133		133
134	uint64_t cycles; /*< Accumulated accounting. /	134	uint64_t cycles; /*< Accumulated accounting. /
135	} task_t;	135	} task_t;
136		136
137	typedef void (* timeout_handler_t)(void *arg);	137	typedef void (* timeout_handler_t)(void *arg);
138		138
139	typedef struct {	139	typedef struct {
140	SPINLOCK_DECLARE(lock);	140	SPINLOCK_DECLARE(lock);
141		141
142	link_t link; /*< Link to the list of active timeouts on THE->cpu /	142	link_t link; /*< Link to the list of active timeouts on THE->cpu /
143		143
144	uint64_t ticks; /*< Timeout will be activated in this amount of clock() ticks. /	144	uint64_t ticks; /*< Timeout will be activated in this amount of clock() ticks. /
145		145
146	timeout_handler_t handler; /*< Function that will be called on timeout activation. /	146	timeout_handler_t handler; /*< Function that will be called on timeout activation. /
147	void arg; /< Argument to be passed to handler() function. /	147	void arg; /< Argument to be passed to handler() function. /
148		148
149	cpu_t cpu; /< On which processor is this timeout registered. /	149	cpu_t cpu; /< On which processor is this timeout registered. /
150	} timeout_t;	150	} timeout_t;
151		151
152	/** Thread states. */	152	/** Thread states. */
153	typedef enum {	153	typedef enum {
154	Invalid, /*< It is an error, if thread is found in this state. /	154	Invalid, /*< It is an error, if thread is found in this state. /
155	Running, /*< State of a thread that is currently executing on some CPU. /	155	Running, /*< State of a thread that is currently executing on some CPU. /
156	Sleeping, /*< Thread in this state is waiting for an event. /	156	Sleeping, /*< Thread in this state is waiting for an event. /
157	Ready, /*< State of threads in a run queue. /	157	Ready, /*< State of threads in a run queue. /
158	Entering, /*< Threads are in this state before they are first readied. /	158	Entering, /*< Threads are in this state before they are first readied. /
159	Exiting, /*< After a thread calls thread_exit(), it is put into Exiting state. /	159	Exiting, /*< After a thread calls thread_exit(), it is put into Exiting state. /
160	Undead /*< Threads that were not detached but exited are in the Undead state. /	160	Undead /*< Threads that were not detached but exited are in the Undead state. /
161	} state_t;	161	} state_t;
162		162
163	/** Join types. */	163	/** Join types. */
164	typedef enum {	164	typedef enum {
165	None,	165	None,
166	TaskClnp, /*< The thread will be joined by ktaskclnp thread. /	166	TaskClnp, /*< The thread will be joined by ktaskclnp thread. /
167	TaskGC /*< The thread will be joined by ktaskgc thread. /	167	TaskGC /*< The thread will be joined by ktaskgc thread. /
168	} thread_join_type_t;	168	} thread_join_type_t;
169		169
170	/** Thread structure. There is one per thread. */	170	/** Thread structure. There is one per thread. */
171	typedef struct thread {	171	typedef struct thread {
172	link_t rq_link; /*< Run queue link. /	172	link_t rq_link; /*< Run queue link. /
173	link_t wq_link; /*< Wait queue link. /	173	link_t wq_link; /*< Wait queue link. /
174	link_t th_link; /*< Links to threads within containing task. /	174	link_t th_link; /*< Links to threads within containing task. /
175		175
176	/** Lock protecting thread structure.	176	/** Lock protecting thread structure.
177	*	177	*
178	* Protects the whole thread structure except list links above.	178	* Protects the whole thread structure except list links above.
179	*/	179	*/
180	SPINLOCK_DECLARE(lock);	180	SPINLOCK_DECLARE(lock);
181		181
182	char name[THREAD_NAME_BUFLEN];	182	char name[THREAD_NAME_BUFLEN];
183		183
184	void (* thread_code)(void ); /< Function implementing the thread. /	184	void (* thread_code)(void ); /< Function implementing the thread. /
185	void thread_arg; /< Argument passed to thread_code() function. /	185	void thread_arg; /< Argument passed to thread_code() function. /
186		186
187	/** From here, the stored context is restored when the thread is scheduled. */	187	/** From here, the stored context is restored when the thread is scheduled. */
188	context_t saved_context;	188	context_t saved_context;
189	/** From here, the stored timeout context is restored when sleep times out. */	189	/** From here, the stored timeout context is restored when sleep times out. */
190	context_t sleep_timeout_context;	190	context_t sleep_timeout_context;
191	/** From here, the stored interruption context is restored when sleep is interrupted. */	191	/** From here, the stored interruption context is restored when sleep is interrupted. */
192	context_t sleep_interruption_context;	192	context_t sleep_interruption_context;
193		193
194	bool sleep_interruptible; /*< If true, the thread can be interrupted from sleep. /	194	bool sleep_interruptible; /*< If true, the thread can be interrupted from sleep. /
195	waitq_t sleep_queue; /< Wait queue in which this thread sleeps. /	195	waitq_t sleep_queue; /< Wait queue in which this thread sleeps. /
196	timeout_t sleep_timeout; /*< Timeout used for timeoutable sleeping. /	196	timeout_t sleep_timeout; /*< Timeout used for timeoutable sleeping. /
197	volatile int timeout_pending; /*< Flag signalling sleep timeout in progress. /	197	volatile int timeout_pending; /*< Flag signalling sleep timeout in progress. /
198		198
199	/** True if this thread is executing copy_from_uspace(). False otherwise. */	199	/** True if this thread is executing copy_from_uspace(). False otherwise. */
200	bool in_copy_from_uspace;	200	bool in_copy_from_uspace;
201	/** True if this thread is executing copy_to_uspace(). False otherwise. */	201	/** True if this thread is executing copy_to_uspace(). False otherwise. */
202	bool in_copy_to_uspace;	202	bool in_copy_to_uspace;
203		203
204	/**	204	/**
205	* If true, the thread will not go to sleep at all and will	205	* If true, the thread will not go to sleep at all and will
206	* call thread_exit() before returning to userspace.	206	* call thread_exit() before returning to userspace.
207	*/	207	*/
208	bool interrupted;	208	bool interrupted;
209		209
210	thread_join_type_t join_type; /*< Who joinins the thread. /	210	thread_join_type_t join_type; /*< Who joinins the thread. /
211	bool detached; /*< If true, thread_join_timeout() cannot be used on this thread. /	211	bool detached; /*< If true, thread_join_timeout() cannot be used on this thread. /
212	waitq_t join_wq; /*< Waitq for thread_join_timeout(). /	212	waitq_t join_wq; /*< Waitq for thread_join_timeout(). /
213		213
214	fpu_context_t *saved_fpu_context;	214	fpu_context_t *saved_fpu_context;
215	int fpu_context_exists;	215	int fpu_context_exists;
216		216
217	/*	217	/*
218	* Defined only if thread doesn't run.	218	* Defined only if thread doesn't run.
219	* It means that fpu context is in CPU that last time executes this thread.	219	* It means that fpu context is in CPU that last time executes this thread.
220	* This disables migration.	220	* This disables migration.
221	*/	221	*/
222	int fpu_context_engaged;	222	int fpu_context_engaged;
223		223
224	rwlock_type_t rwlock_holder_type;	224	rwlock_type_t rwlock_holder_type;
225		225
226	void (* call_me)(void ); /< Funtion to be called in scheduler before the thread is put asleep. /	226	void (* call_me)(void ); /< Funtion to be called in scheduler before the thread is put asleep. /
227	void call_me_with; /< Argument passed to call_me(). /	227	void call_me_with; /< Argument passed to call_me(). /
228		228
229	state_t state; /*< Thread's state. /	229	state_t state; /*< Thread's state. /
230	int flags; /*< Thread's flags. /	230	int flags; /*< Thread's flags. /
231		231
232	cpu_t cpu; /< Thread's CPU. /	232	cpu_t cpu; /< Thread's CPU. /
233	task_t task; /< Containing task. /	233	task_t task; /< Containing task. /
234		234
235	uint64_t ticks; /*< Ticks before preemption. /	235	uint64_t ticks; /*< Ticks before preemption. /
236		236
237	uint64_t cycles; /*< Thread accounting. /	237	uint64_t cycles; /*< Thread accounting. /
238	uint64_t last_cycle; /*< Last sampled cycle. /	238	uint64_t last_cycle; /*< Last sampled cycle. /
239	bool uncounted; /*< Thread doesn't affect accumulated accounting. /	239	bool uncounted; /*< Thread doesn't affect accumulated accounting. /
240		240
241	int priority; /*< Thread's priority. Implemented as index to CPU->rq /	241	int priority; /*< Thread's priority. Implemented as index to CPU->rq /
242	uint32_t tid; /*< Thread ID. /	242	uint32_t tid; /*< Thread ID. /
243		243
244	thread_arch_t arch; /*< Architecture-specific data. /	244	thread_arch_t arch; /*< Architecture-specific data. /
245		245
246	uint8_t kstack; /< Thread's kernel stack. /	246	uint8_t kstack; /< Thread's kernel stack. /
247	} thread_t;	247	} thread_t;
248		248
249	extern spinlock_t tasks_lock;	249	SPINLOCK_EXTERN(tasks_lock);
250	extern btree_t tasks_btree;	250	extern btree_t tasks_btree;
251		251
252	extern void task_init(void);	252	extern void task_init(void);
253	extern task_t task_create(as_t as, char *name);	253	extern task_t task_create(as_t as, char *name);
254	extern void task_destroy(task_t *t);	254	extern void task_destroy(task_t *t);
255	extern task_t task_run_program(void program_addr, char *name);	255	extern task_t task_run_program(void program_addr, char *name);
256	extern task_t *task_find_by_id(task_id_t id);	256	extern task_t *task_find_by_id(task_id_t id);
257	extern int task_kill(task_id_t id);	257	extern int task_kill(task_id_t id);
258	extern uint64_t task_get_accounting(task_t *t);	258	extern uint64_t task_get_accounting(task_t *t);
259		259
260	extern void cap_set(task_t *t, cap_t caps);	260	extern void cap_set(task_t *t, cap_t caps);
261	extern cap_t cap_get(task_t *t);	261	extern cap_t cap_get(task_t *t);
262		262
263		263
264	#ifndef task_create_arch	264	#ifndef task_create_arch
265	extern void task_create_arch(task_t *t);	265	extern void task_create_arch(task_t *t);
266	#endif	266	#endif
267		267
268	#ifndef task_destroy_arch	268	#ifndef task_destroy_arch
269	extern void task_destroy_arch(task_t *t);	269	extern void task_destroy_arch(task_t *t);
270	#endif	270	#endif
271		271
272	extern unative_t sys_task_get_id(task_id_t *uspace_task_id);	272	extern unative_t sys_task_get_id(task_id_t *uspace_task_id);
273		273
274	#endif	274	#endif
275		275
276	/** @}	276	/** @}
277	*/	277	*/
278		278

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(root)/trunk/kernel/generic/include/proc/task.h – Rev 2092 → 2093