| 1 | /*
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| 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 |
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| 29 | /** @addtogroup genericproc
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #ifndef __TASK_H__
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| 36 | #define __TASK_H__
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| 37 |
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| 38 | #include <typedefs.h>
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| 39 | #include <synch/spinlock.h>
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| 40 | #include <synch/mutex.h>
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| 41 | #include <synch/futex.h>
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| 42 | #include <adt/btree.h>
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| 43 | #include <adt/list.h>
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| 44 | #include <ipc/ipc.h>
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| 45 | #include <security/cap.h>
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| 46 | #include <arch/proc/task.h>
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| 47 |
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| 48 | /** Task structure. */
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| 49 | struct task {
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| 50 | /** Task lock.
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| 51 | *
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| 52 | * Must be acquired before threads_lock and thread lock of any of its threads.
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| 53 | */
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| 54 | SPINLOCK_DECLARE(lock);
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| 55 |
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| 56 | char *name;
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| 57 | thread_t *main_thread; /**< Pointer to the main thread. */
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| 58 | link_t th_head; /**< List of threads contained in this task. */
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| 59 | as_t *as; /**< Address space. */
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| 60 | task_id_t taskid; /**< Unique identity of task */
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| 61 | context_id_t context; /**< Task security context */
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| 62 |
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| 63 | /** If this is true, new threads can become part of the task. */
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| 64 | bool accept_new_threads;
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| 65 |
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| 66 | count_t refcount; /**< Number of references (i.e. threads). */
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| 67 |
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| 68 | cap_t capabilities; /**< Task capabilities. */
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| 69 |
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| 70 | /* IPC stuff */
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| 71 | answerbox_t answerbox; /**< Communication endpoint */
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| 72 | phone_t phones[IPC_MAX_PHONES];
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| 73 | atomic_t active_calls; /**< Active asynchronous messages.
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| 74 | * It is used for limiting uspace to
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| 75 | * certain extent. */
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| 76 |
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| 77 | task_arch_t arch; /**< Architecture specific task data. */
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| 78 |
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| 79 | /**
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| 80 | * Serializes access to the B+tree of task's futexes. This mutex is
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| 81 | * independent on the task spinlock.
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| 82 | */
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| 83 | mutex_t futexes_lock;
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| 84 | btree_t futexes; /**< B+tree of futexes referenced by this task. */
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| 85 | };
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| 86 |
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| 87 | extern spinlock_t tasks_lock;
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| 88 | extern btree_t tasks_btree;
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| 89 |
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| 90 | extern void task_init(void);
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| 91 | extern task_t *task_create(as_t *as, char *name);
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| 92 | extern void task_destroy(task_t *t);
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| 93 | extern task_t *task_run_program(void *program_addr, char *name);
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| 94 | extern task_t *task_find_by_id(task_id_t id);
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| 95 | extern int task_kill(task_id_t id);
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| 96 |
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| 97 |
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| 98 | #ifndef task_create_arch
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| 99 | extern void task_create_arch(task_t *t);
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| 100 | #endif
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| 101 |
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| 102 | #ifndef task_destroy_arch
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| 103 | extern void task_destroy_arch(task_t *t);
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| 104 | #endif
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| 105 |
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| 106 | extern unative_t sys_task_get_id(task_id_t *uspace_task_id);
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| 107 |
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| 108 | #endif
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| 109 |
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| 110 | /** @}
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| 111 | */
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| 112 |
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