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| 1 | jermar | 1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #ifndef __TASK_H__ |
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| 30 | #define __TASK_H__ |
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| 31 | |||
| 32 | #include <typedefs.h> |
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| 33 | #include <synch/spinlock.h> |
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| 1460 | jermar | 34 | #include <synch/mutex.h> |
| 1159 | jermar | 35 | #include <adt/btree.h> |
| 788 | jermar | 36 | #include <adt/list.h> |
| 955 | palkovsky | 37 | #include <ipc/ipc.h> |
| 1174 | jermar | 38 | #include <security/cap.h> |
| 1184 | jermar | 39 | #include <arch/proc/task.h> |
| 1 | jermar | 40 | |
| 703 | jermar | 41 | /** Task structure. */ |
| 1 | jermar | 42 | struct task { |
| 1579 | jermar | 43 | /** Task lock. |
| 44 | * |
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| 45 | * Must be acquired before threads_lock and thread lock of any of its threads. |
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| 46 | */ |
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| 623 | jermar | 47 | SPINLOCK_DECLARE(lock); |
| 1579 | jermar | 48 | |
| 1062 | jermar | 49 | char *name; |
| 410 | jermar | 50 | link_t th_head; /**< List of threads contained in this task. */ |
| 703 | jermar | 51 | as_t *as; /**< Address space. */ |
| 1159 | jermar | 52 | task_id_t taskid; /**< Unique identity of task */ |
| 1005 | palkovsky | 53 | |
| 1579 | jermar | 54 | /** If this is true, new threads can become part of the task. */ |
| 55 | bool accept_new_threads; |
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| 56 | |||
| 57 | count_t refcount; /**< Number of references (i.e. threads). */ |
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| 58 | |||
| 1174 | jermar | 59 | cap_t capabilities; /**< Task capabilities. */ |
| 60 | |||
| 998 | palkovsky | 61 | /* IPC stuff */ |
| 955 | palkovsky | 62 | answerbox_t answerbox; /**< Communication endpoint */ |
| 63 | phone_t phones[IPC_MAX_PHONES]; |
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| 1568 | palkovsky | 64 | atomic_t active_calls; /**< Active asynchronous messages. |
| 65 | * It is used for limiting uspace to |
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| 66 | * certain extent. */ |
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| 1184 | jermar | 67 | |
| 1187 | jermar | 68 | task_arch_t arch; /**< Architecture specific task data. */ |
| 1460 | jermar | 69 | |
| 70 | /** |
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| 1468 | jermar | 71 | * Serializes access to the B+tree of task's futexes. This mutex is |
| 72 | * independent on the task spinlock. |
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| 73 | */ |
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| 1460 | jermar | 74 | mutex_t futexes_lock; |
| 75 | btree_t futexes; /**< B+tree of futexes referenced by this task. */ |
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| 1 | jermar | 76 | }; |
| 77 | |||
| 78 | extern spinlock_t tasks_lock; |
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| 1159 | jermar | 79 | extern btree_t tasks_btree; |
| 1 | jermar | 80 | |
| 81 | extern void task_init(void); |
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| 1062 | jermar | 82 | extern task_t *task_create(as_t *as, char *name); |
| 1579 | jermar | 83 | extern void task_destroy(task_t *t); |
| 1062 | jermar | 84 | extern task_t *task_run_program(void *program_addr, char *name); |
| 1178 | jermar | 85 | extern task_t *task_find_by_id(task_id_t id); |
| 1579 | jermar | 86 | extern int task_kill(task_id_t id); |
| 1 | jermar | 87 | |
| 1579 | jermar | 88 | |
| 1185 | jermar | 89 | #ifndef task_create_arch |
| 90 | extern void task_create_arch(task_t *t); |
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| 91 | #endif |
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| 92 | |||
| 1227 | jermar | 93 | extern __native sys_task_get_id(task_id_t *uspace_task_id); |
| 1176 | jermar | 94 | |
| 1 | jermar | 95 | #endif |