Subversion Repositories HelenOS

Rev

Rev 3983 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
2090 decky 1
/*
2071 jermar 2
 * Copyright (c) 2001-2004 Jakub Jermar
1 jermar 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
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
15
 *   derived from this software without specific prior written permission.
16
 *
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
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
1820 decky 29
/** @addtogroup genericproc
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
1888 jermar 35
#ifndef KERN_TASK_H_
36
#define KERN_TASK_H_
1 jermar 37
 
2092 decky 38
#include <cpu.h>
2105 decky 39
#include <ipc/ipc.h>
1 jermar 40
#include <synch/spinlock.h>
1460 jermar 41
#include <synch/mutex.h>
2089 decky 42
#include <synch/rwlock.h>
1583 jermar 43
#include <synch/futex.h>
2504 jermar 44
#include <adt/avl.h>
1159 jermar 45
#include <adt/btree.h>
788 jermar 46
#include <adt/list.h>
1174 jermar 47
#include <security/cap.h>
1184 jermar 48
#include <arch/proc/task.h>
2089 decky 49
#include <arch/proc/thread.h>
50
#include <arch/context.h>
51
#include <arch/fpu_context.h>
52
#include <arch/cpu.h>
53
#include <mm/tlb.h>
54
#include <proc/scheduler.h>
3438 svoboda 55
#include <udebug/udebug.h>
3620 svoboda 56
#include <ipc/kbox.h>
1 jermar 57
 
3566 svoboda 58
#define TASK_NAME_BUFLEN    20
59
 
2089 decky 60
struct thread;
61
 
703 jermar 62
/** Task structure. */
2089 decky 63
typedef struct task {
2504 jermar 64
    /** Task's linkage for the tasks_tree AVL tree. */
65
    avltree_node_t tasks_tree_node;
66
 
1579 jermar 67
    /** Task lock.
68
     *
2106 jermar 69
     * Must be acquired before threads_lock and thread lock of any of its
70
     * threads.
1579 jermar 71
     */
623 jermar 72
    SPINLOCK_DECLARE(lock);
3566 svoboda 73
 
74
    char name[TASK_NAME_BUFLEN];
2106 jermar 75
    /** List of threads contained in this task. */
76
    link_t th_head;
77
    /** Address space. */
78
    as_t *as;
79
    /** Unique identity of task. */
80
    task_id_t taskid;
81
    /** Task security context. */
82
    context_id_t context;  
1005 palkovsky 83
 
2106 jermar 84
    /** Number of references (i.e. threads). */
2446 jermar 85
    atomic_t refcount;
86
    /** Number of threads that haven't exited yet. */
87
    atomic_t lifecount;
1579 jermar 88
 
2106 jermar 89
    /** Task capabilities. */
90
    cap_t capabilities;
1579 jermar 91
 
998 palkovsky 92
    /* IPC stuff */
955 palkovsky 93
    answerbox_t answerbox;  /**< Communication endpoint */
94
    phone_t phones[IPC_MAX_PHONES];
2106 jermar 95
    /**
96
     * Active asynchronous messages. It is used for limiting uspace to
97
     * certain extent.
98
     */
2216 decky 99
    atomic_t active_calls;
3438 svoboda 100
 
101
#ifdef CONFIG_UDEBUG
3620 svoboda 102
    /** Debugging stuff. */
3438 svoboda 103
    udebug_task_t udebug;
104
 
3620 svoboda 105
    /** Kernel answerbox. */
106
    kbox_t kb;
3438 svoboda 107
#endif
3620 svoboda 108
 
2106 jermar 109
    /** Architecture specific task data. */
2216 decky 110
    task_arch_t arch;
1460 jermar 111
 
112
    /**
1468 jermar 113
     * Serializes access to the B+tree of task's futexes. This mutex is
114
     * independent on the task spinlock.
115
     */
1460 jermar 116
    mutex_t futexes_lock;
2106 jermar 117
    /** B+tree of futexes referenced by this task. */
118
    btree_t futexes;   
2039 decky 119
 
2106 jermar 120
    /** Accumulated accounting. */
121
    uint64_t cycles;
2089 decky 122
} task_t;
1 jermar 123
 
2093 decky 124
SPINLOCK_EXTERN(tasks_lock);
2504 jermar 125
extern avltree_t tasks_tree;
1 jermar 126
 
127
extern void task_init(void);
2227 decky 128
extern void task_done(void);
1062 jermar 129
extern task_t *task_create(as_t *as, char *name);
1579 jermar 130
extern void task_destroy(task_t *t);
1178 jermar 131
extern task_t *task_find_by_id(task_id_t id);
1579 jermar 132
extern int task_kill(task_id_t id);
2039 decky 133
extern uint64_t task_get_accounting(task_t *t);
1 jermar 134
 
2089 decky 135
extern void cap_set(task_t *t, cap_t caps);
136
extern cap_t cap_get(task_t *t);
1579 jermar 137
 
1185 jermar 138
#ifndef task_create_arch
139
extern void task_create_arch(task_t *t);
140
#endif
141
 
1587 jermar 142
#ifndef task_destroy_arch
143
extern void task_destroy_arch(task_t *t);
144
#endif
145
 
1780 jermar 146
extern unative_t sys_task_get_id(task_id_t *uspace_task_id);
3983 svoboda 147
extern unative_t sys_task_set_name(const char *uspace_name, size_t name_len);
1176 jermar 148
 
1 jermar 149
#endif
1702 cejka 150
 
1888 jermar 151
/** @}
1702 cejka 152
 */