| 1 | /*
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| 2 | * Copyright (c) 2010 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 KERN_TASK_H_
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| 36 | #define KERN_TASK_H_
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| 37 |
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| 38 | #include <cpu.h>
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| 39 | #include <ipc/ipc.h>
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| 40 | #include <synch/spinlock.h>
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| 41 | #include <synch/mutex.h>
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| 42 | #include <synch/rwlock.h>
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| 43 | #include <synch/futex.h>
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| 44 | #include <adt/avl.h>
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| 45 | #include <adt/btree.h>
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| 46 | #include <adt/list.h>
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| 47 | #include <security/cap.h>
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| 48 | #include <arch/proc/task.h>
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| 49 | #include <arch/proc/thread.h>
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| 50 | #include <arch/context.h>
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| 51 | #include <arch/fpu_context.h>
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| 52 | #include <arch/cpu.h>
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| 53 | #include <mm/tlb.h>
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| 54 | #include <proc/scheduler.h>
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| 55 | #include <udebug/udebug.h>
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| 56 | #include <ipc/kbox.h>
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| 57 | #include <mm/as.h>
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| 58 | #include <sysinfo/abi.h>
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| 59 |
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| 60 | struct thread;
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| 61 |
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| 62 | /** Task structure. */
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| 63 | typedef struct task {
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| 64 | /** Task's linkage for the tasks_tree AVL tree. */
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| 65 | avltree_node_t tasks_tree_node;
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| 66 |
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| 67 | /** Task lock.
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| 68 | *
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| 69 | * Must be acquired before threads_lock and thread lock of any of its
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| 70 | * threads.
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| 71 | */
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| 72 | SPINLOCK_DECLARE(lock);
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| 73 |
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| 74 | char name[TASK_NAME_BUFLEN];
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| 75 | /** List of threads contained in this task. */
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| 76 | link_t th_head;
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| 77 | /** Address space. */
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| 78 | as_t *as;
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| 79 | /** Unique identity of task. */
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| 80 | task_id_t taskid;
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| 81 | /** Task security context. */
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| 82 | context_id_t context;
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| 83 |
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| 84 | /** Number of references (i.e. threads). */
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| 85 | atomic_t refcount;
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| 86 | /** Number of threads that haven't exited yet. */
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| 87 | atomic_t lifecount;
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| 88 |
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| 89 | /** Task capabilities. */
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| 90 | cap_t capabilities;
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| 91 |
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| 92 | /* IPC stuff */
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| 93 | answerbox_t answerbox; /**< Communication endpoint */
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| 94 | phone_t phones[IPC_MAX_PHONES];
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| 95 | stats_ipc_t ipc_info; /**< IPC statistics */
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| 96 | /**
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| 97 | * Active asynchronous messages. It is used for limiting uspace to
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| 98 | * certain extent.
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| 99 | */
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| 100 | atomic_t active_calls;
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| 101 | /** List of synchronous answerboxes. */
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| 102 | link_t sync_box_head;
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| 103 |
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| 104 | #ifdef CONFIG_UDEBUG
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| 105 | /** Debugging stuff. */
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| 106 | udebug_task_t udebug;
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| 107 |
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| 108 | /** Kernel answerbox. */
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| 109 | kbox_t kb;
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| 110 | #endif
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| 111 |
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| 112 | /** Architecture specific task data. */
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| 113 | task_arch_t arch;
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| 114 |
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| 115 | /**
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| 116 | * Serializes access to the B+tree of task's futexes. This mutex is
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| 117 | * independent on the task spinlock.
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| 118 | */
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| 119 | mutex_t futexes_lock;
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| 120 | /** B+tree of futexes referenced by this task. */
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| 121 | btree_t futexes;
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| 122 |
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| 123 | /** Accumulated accounting. */
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| 124 | uint64_t ucycles;
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| 125 | uint64_t kcycles;
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| 126 | } task_t;
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| 127 |
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| 128 | SPINLOCK_EXTERN(tasks_lock);
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| 129 | extern avltree_t tasks_tree;
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| 130 |
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| 131 | extern void task_init(void);
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| 132 | extern void task_done(void);
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| 133 | extern task_t *task_create(as_t *, const char *);
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| 134 | extern void task_destroy(task_t *);
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| 135 | extern void task_hold(task_t *);
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| 136 | extern void task_release(task_t *);
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| 137 | extern task_t *task_find_by_id(task_id_t);
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| 138 | extern int task_kill(task_id_t);
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| 139 | extern void task_get_accounting(task_t *, uint64_t *, uint64_t *);
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| 140 | extern void task_print_list(void);
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| 141 |
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| 142 | extern void cap_set(task_t *, cap_t);
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| 143 | extern cap_t cap_get(task_t *);
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| 144 |
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| 145 | #ifndef task_create_arch
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| 146 | extern void task_create_arch(task_t *);
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| 147 | #endif
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| 148 |
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| 149 | #ifndef task_destroy_arch
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| 150 | extern void task_destroy_arch(task_t *);
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| 151 | #endif
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| 152 |
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| 153 | extern unative_t sys_task_get_id(task_id_t *);
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| 154 | extern unative_t sys_task_set_name(const char *, size_t);
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| 155 |
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| 156 | #endif
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| 157 |
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| 158 | /** @}
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| 159 | */
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