Subversion Repositories HelenOS

Rev

Rev 3424 | Rev 3431 | Go to most recent revision | 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>
2825 svoboda 55
#include <udebug/udebug.h>
1 jermar 56
 
2089 decky 57
struct thread;
58
 
703 jermar 59
/** Task structure. */
2089 decky 60
typedef struct task {
2504 jermar 61
    /** Task's linkage for the tasks_tree AVL tree. */
62
    avltree_node_t tasks_tree_node;
63
 
1579 jermar 64
    /** Task lock.
65
     *
2106 jermar 66
     * Must be acquired before threads_lock and thread lock of any of its
67
     * threads.
1579 jermar 68
     */
623 jermar 69
    SPINLOCK_DECLARE(lock);
1579 jermar 70
 
1062 jermar 71
    char *name;
2106 jermar 72
    /** List of threads contained in this task. */
73
    link_t th_head;
74
    /** Address space. */
75
    as_t *as;
76
    /** Unique identity of task. */
77
    task_id_t taskid;
78
    /** Task security context. */
79
    context_id_t context;  
1005 palkovsky 80
 
2106 jermar 81
    /** Number of references (i.e. threads). */
2446 jermar 82
    atomic_t refcount;
83
    /** Number of threads that haven't exited yet. */
84
    atomic_t lifecount;
1579 jermar 85
 
2106 jermar 86
    /** Task capabilities. */
87
    cap_t capabilities;
1579 jermar 88
 
998 palkovsky 89
    /* IPC stuff */
955 palkovsky 90
    answerbox_t answerbox;  /**< Communication endpoint */
91
    phone_t phones[IPC_MAX_PHONES];
2106 jermar 92
    /**
93
     * Active asynchronous messages. It is used for limiting uspace to
94
     * certain extent.
95
     */
2216 decky 96
    atomic_t active_calls;
2801 svoboda 97
 
98
    /** Debugging stuff */
3014 svoboda 99
    udebug_task_t udebug;
2808 svoboda 100
 
2839 svoboda 101
    /** Kernel answerbox */
2808 svoboda 102
    answerbox_t kernel_box;
2839 svoboda 103
    /** Thread used to service kernel answerbox */
2808 svoboda 104
    struct thread *kb_thread;
2902 svoboda 105
    /** Kbox thread creation vs. begin of cleanup mutual exclusion */
3034 svoboda 106
    mutex_t kb_cleanup_lock;
2902 svoboda 107
    /** True if cleanup of kbox has already started */
108
    bool kb_finished;
1184 jermar 109
 
2106 jermar 110
    /** Architecture specific task data. */
2216 decky 111
    task_arch_t arch;
1460 jermar 112
 
113
    /**
1468 jermar 114
     * Serializes access to the B+tree of task's futexes. This mutex is
115
     * independent on the task spinlock.
116
     */
1460 jermar 117
    mutex_t futexes_lock;
2106 jermar 118
    /** B+tree of futexes referenced by this task. */
119
    btree_t futexes;   
2039 decky 120
 
2106 jermar 121
    /** Accumulated accounting. */
122
    uint64_t cycles;
2089 decky 123
} task_t;
1 jermar 124
 
2093 decky 125
SPINLOCK_EXTERN(tasks_lock);
2504 jermar 126
extern avltree_t tasks_tree;
1 jermar 127
 
128
extern void task_init(void);
2227 decky 129
extern void task_done(void);
1062 jermar 130
extern task_t *task_create(as_t *as, char *name);
1579 jermar 131
extern void task_destroy(task_t *t);
1178 jermar 132
extern task_t *task_find_by_id(task_id_t id);
1579 jermar 133
extern int task_kill(task_id_t id);
2039 decky 134
extern uint64_t task_get_accounting(task_t *t);
1 jermar 135
 
2089 decky 136
extern void cap_set(task_t *t, cap_t caps);
137
extern cap_t cap_get(task_t *t);
1579 jermar 138
 
1185 jermar 139
#ifndef task_create_arch
140
extern void task_create_arch(task_t *t);
141
#endif
142
 
1587 jermar 143
#ifndef task_destroy_arch
144
extern void task_destroy_arch(task_t *t);
145
#endif
146
 
1780 jermar 147
extern unative_t sys_task_get_id(task_id_t *uspace_task_id);
1176 jermar 148
 
1 jermar 149
#endif
1702 cejka 150
 
1888 jermar 151
/** @}
1702 cejka 152
 */