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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 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 | 55 | ||
56 | struct thread; |
56 | struct thread; |
57 | 57 | ||
58 | /** Task structure. */ |
58 | /** Task structure. */ |
59 | typedef struct task { |
59 | typedef struct task { |
60 | /** Task's linkage for the tasks_tree AVL tree. */ |
60 | /** Task's linkage for the tasks_tree AVL tree. */ |
61 | avltree_node_t tasks_tree_node; |
61 | avltree_node_t tasks_tree_node; |
62 | 62 | ||
63 | /** Task lock. |
63 | /** Task lock. |
64 | * |
64 | * |
65 | * Must be acquired before threads_lock and thread lock of any of its |
65 | * Must be acquired before threads_lock and thread lock of any of its |
66 | * threads. |
66 | * threads. |
67 | */ |
67 | */ |
68 | SPINLOCK_DECLARE(lock); |
68 | SPINLOCK_DECLARE(lock); |
69 | 69 | ||
70 | char *name; |
70 | char *name; |
71 | /** List of threads contained in this task. */ |
71 | /** List of threads contained in this task. */ |
72 | link_t th_head; |
72 | link_t th_head; |
73 | /** Address space. */ |
73 | /** Address space. */ |
74 | as_t *as; |
74 | as_t *as; |
75 | /** Unique identity of task. */ |
75 | /** Unique identity of task. */ |
76 | task_id_t taskid; |
76 | task_id_t taskid; |
77 | /** Task security context. */ |
77 | /** Task security context. */ |
78 | context_id_t context; |
78 | context_id_t context; |
79 | 79 | ||
80 | /** Number of references (i.e. threads). */ |
80 | /** Number of references (i.e. threads). */ |
81 | atomic_t refcount; |
81 | atomic_t refcount; |
82 | /** Number of threads that haven't exited yet. */ |
82 | /** Number of threads that haven't exited yet. */ |
83 | atomic_t lifecount; |
83 | atomic_t lifecount; |
84 | 84 | ||
85 | /** Task capabilities. */ |
85 | /** Task capabilities. */ |
86 | cap_t capabilities; |
86 | cap_t capabilities; |
87 | 87 | ||
88 | /* IPC stuff */ |
88 | /* IPC stuff */ |
89 | answerbox_t answerbox; /**< Communication endpoint */ |
89 | answerbox_t answerbox; /**< Communication endpoint */ |
90 | phone_t phones[IPC_MAX_PHONES]; |
90 | phone_t phones[IPC_MAX_PHONES]; |
91 | /** |
91 | /** |
92 | * Active asynchronous messages. It is used for limiting uspace to |
92 | * Active asynchronous messages. It is used for limiting uspace to |
93 | * certain extent. |
93 | * certain extent. |
94 | */ |
94 | */ |
95 | atomic_t active_calls; |
95 | atomic_t active_calls; |
96 | 96 | ||
97 | /** Architecture specific task data. */ |
97 | /** Architecture specific task data. */ |
98 | task_arch_t arch; |
98 | task_arch_t arch; |
99 | 99 | ||
100 | /** |
100 | /** |
101 | * Serializes access to the B+tree of task's futexes. This mutex is |
101 | * Serializes access to the B+tree of task's futexes. This mutex is |
102 | * independent on the task spinlock. |
102 | * independent on the task spinlock. |
103 | */ |
103 | */ |
104 | mutex_t futexes_lock; |
104 | mutex_t futexes_lock; |
105 | /** B+tree of futexes referenced by this task. */ |
105 | /** B+tree of futexes referenced by this task. */ |
106 | btree_t futexes; |
106 | btree_t futexes; |
107 | 107 | ||
108 | /** Accumulated accounting. */ |
108 | /** Accumulated accounting. */ |
109 | uint64_t cycles; |
109 | uint64_t cycles; |
110 | } task_t; |
110 | } task_t; |
111 | 111 | ||
112 | SPINLOCK_EXTERN(tasks_lock); |
112 | SPINLOCK_EXTERN(tasks_lock); |
113 | extern avltree_t tasks_tree; |
113 | extern avltree_t tasks_tree; |
114 | 114 | ||
115 | extern void task_init(void); |
115 | extern void task_init(void); |
116 | extern void task_done(void); |
116 | extern void task_done(void); |
117 | extern task_t *task_create(as_t *as, char *name); |
117 | extern task_t *task_create(as_t *as, char *name); |
118 | extern void task_destroy(task_t *t); |
118 | extern void task_destroy(task_t *t); |
119 | extern task_t *task_find_by_id(task_id_t id); |
119 | extern task_t *task_find_by_id(task_id_t id); |
120 | extern int task_kill(task_id_t id); |
120 | extern int task_kill(task_id_t id); |
121 | extern uint64_t task_get_accounting(task_t *t); |
121 | extern uint64_t task_get_accounting(task_t *t); |
122 | 122 | ||
123 | extern void cap_set(task_t *t, cap_t caps); |
123 | extern void cap_set(task_t *t, cap_t caps); |
124 | extern cap_t cap_get(task_t *t); |
124 | extern cap_t cap_get(task_t *t); |
125 | 125 | ||
126 | #ifndef task_create_arch |
126 | #ifndef task_create_arch |
127 | extern void task_create_arch(task_t *t); |
127 | extern void task_create_arch(task_t *t); |
128 | #endif |
128 | #endif |
129 | 129 | ||
130 | #ifndef task_destroy_arch |
130 | #ifndef task_destroy_arch |
131 | extern void task_destroy_arch(task_t *t); |
131 | extern void task_destroy_arch(task_t *t); |
132 | #endif |
132 | #endif |
133 | 133 | ||
134 | extern unative_t sys_task_get_id(task_id_t *uspace_task_id); |
134 | extern unative_t sys_task_get_id(task_id_t *uspace_task_id); |
135 | 135 | ||
136 | #endif |
136 | #endif |
137 | 137 | ||
138 | /** @} |
138 | /** @} |
139 | */ |
139 | */ |
140 | 140 |