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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 __TASK_H__ |
35 | #ifndef __TASK_H__ |
36 | #define __TASK_H__ |
36 | #define __TASK_H__ |
37 | 37 | ||
38 | #include <typedefs.h> |
38 | #include <typedefs.h> |
39 | #include <synch/spinlock.h> |
39 | #include <synch/spinlock.h> |
40 | #include <synch/mutex.h> |
40 | #include <synch/mutex.h> |
41 | #include <synch/futex.h> |
41 | #include <synch/futex.h> |
42 | #include <adt/btree.h> |
42 | #include <adt/btree.h> |
43 | #include <adt/list.h> |
43 | #include <adt/list.h> |
44 | #include <ipc/ipc.h> |
44 | #include <ipc/ipc.h> |
45 | #include <security/cap.h> |
45 | #include <security/cap.h> |
46 | #include <arch/proc/task.h> |
46 | #include <arch/proc/task.h> |
47 | 47 | ||
48 | /** Task structure. */ |
48 | /** Task structure. */ |
49 | struct task { |
49 | struct task { |
50 | /** Task lock. |
50 | /** Task lock. |
51 | * |
51 | * |
52 | * Must be acquired before threads_lock and thread lock of any of its threads. |
52 | * Must be acquired before threads_lock and thread lock of any of its threads. |
53 | */ |
53 | */ |
54 | SPINLOCK_DECLARE(lock); |
54 | SPINLOCK_DECLARE(lock); |
55 | 55 | ||
56 | char *name; |
56 | char *name; |
57 | thread_t *main_thread; /**< Pointer to the main thread. */ |
57 | thread_t *main_thread; /**< Pointer to the main thread. */ |
58 | link_t th_head; /**< List of threads contained in this task. */ |
58 | link_t th_head; /**< List of threads contained in this task. */ |
59 | as_t *as; /**< Address space. */ |
59 | as_t *as; /**< Address space. */ |
60 | task_id_t taskid; /**< Unique identity of task */ |
60 | task_id_t taskid; /**< Unique identity of task */ |
61 | 61 | ||
62 | /** If this is true, new threads can become part of the task. */ |
62 | /** If this is true, new threads can become part of the task. */ |
63 | bool accept_new_threads; |
63 | bool accept_new_threads; |
64 | 64 | ||
65 | count_t refcount; /**< Number of references (i.e. threads). */ |
65 | count_t refcount; /**< Number of references (i.e. threads). */ |
66 | 66 | ||
67 | cap_t capabilities; /**< Task capabilities. */ |
67 | cap_t capabilities; /**< Task capabilities. */ |
68 | 68 | ||
69 | /* IPC stuff */ |
69 | /* IPC stuff */ |
70 | answerbox_t answerbox; /**< Communication endpoint */ |
70 | answerbox_t answerbox; /**< Communication endpoint */ |
71 | phone_t phones[IPC_MAX_PHONES]; |
71 | phone_t phones[IPC_MAX_PHONES]; |
72 | atomic_t active_calls; /**< Active asynchronous messages. |
72 | atomic_t active_calls; /**< Active asynchronous messages. |
73 | * It is used for limiting uspace to |
73 | * It is used for limiting uspace to |
74 | * certain extent. */ |
74 | * certain extent. */ |
75 | 75 | ||
76 | task_arch_t arch; /**< Architecture specific task data. */ |
76 | task_arch_t arch; /**< Architecture specific task data. */ |
77 | 77 | ||
78 | /** |
78 | /** |
79 | * Serializes access to the B+tree of task's futexes. This mutex is |
79 | * Serializes access to the B+tree of task's futexes. This mutex is |
80 | * independent on the task spinlock. |
80 | * independent on the task spinlock. |
81 | */ |
81 | */ |
82 | mutex_t futexes_lock; |
82 | mutex_t futexes_lock; |
83 | btree_t futexes; /**< B+tree of futexes referenced by this task. */ |
83 | btree_t futexes; /**< B+tree of futexes referenced by this task. */ |
84 | }; |
84 | }; |
85 | 85 | ||
86 | extern spinlock_t tasks_lock; |
86 | extern spinlock_t tasks_lock; |
87 | extern btree_t tasks_btree; |
87 | extern btree_t tasks_btree; |
88 | 88 | ||
89 | extern void task_init(void); |
89 | extern void task_init(void); |
90 | extern task_t *task_create(as_t *as, char *name); |
90 | extern task_t *task_create(as_t *as, char *name); |
91 | extern void task_destroy(task_t *t); |
91 | extern void task_destroy(task_t *t); |
92 | extern task_t *task_run_program(void *program_addr, char *name); |
92 | extern task_t *task_run_program(void *program_addr, char *name); |
93 | extern task_t *task_find_by_id(task_id_t id); |
93 | extern task_t *task_find_by_id(task_id_t id); |
94 | extern int task_kill(task_id_t id); |
94 | extern int task_kill(task_id_t id); |
95 | 95 | ||
96 | 96 | ||
97 | #ifndef task_create_arch |
97 | #ifndef task_create_arch |
98 | extern void task_create_arch(task_t *t); |
98 | extern void task_create_arch(task_t *t); |
99 | #endif |
99 | #endif |
100 | 100 | ||
101 | #ifndef task_destroy_arch |
101 | #ifndef task_destroy_arch |
102 | extern void task_destroy_arch(task_t *t); |
102 | extern void task_destroy_arch(task_t *t); |
103 | #endif |
103 | #endif |
104 | 104 | ||
105 | extern __native sys_task_get_id(task_id_t *uspace_task_id); |
105 | extern unative_t sys_task_get_id(task_id_t *uspace_task_id); |
106 | 106 | ||
107 | #endif |
107 | #endif |
108 | 108 | ||
109 | /** @} |
109 | /** @} |
110 | */ |
110 | */ |
111 | 111 | ||
112 | 112 |