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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  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
  15.  *   derived from this software without specific prior written permission.
  16.  *
  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
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  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
  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
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. #ifndef __TASK_H__
  30. #define __TASK_H__
  31.  
  32. #include <typedefs.h>
  33. #include <synch/spinlock.h>
  34. #include <synch/mutex.h>
  35. #include <adt/btree.h>
  36. #include <adt/list.h>
  37. #include <ipc/ipc.h>
  38. #include <security/cap.h>
  39. #include <arch/proc/task.h>
  40.  
  41. /** Task structure. */
  42. struct task {
  43.     SPINLOCK_DECLARE(lock);
  44.     char *name;
  45.     link_t th_head;     /**< List of threads contained in this task. */
  46.     as_t *as;       /**< Address space. */
  47.     task_id_t taskid;   /**< Unique identity of task */
  48.  
  49.     cap_t capabilities; /**< Task capabilities. */
  50.  
  51.     /* IPC stuff */
  52.     answerbox_t answerbox;  /**< Communication endpoint */
  53.     phone_t phones[IPC_MAX_PHONES];
  54.     atomic_t active_calls;  /**< Active asynchronous messages */
  55.    
  56.     task_arch_t arch;   /**< Architecture specific task data. */
  57.    
  58.     /**
  59.       * Serializes access to the B+tree of task's futexes. This mutex is
  60.       * independent on the task spinlock.
  61.       */
  62.     mutex_t futexes_lock;
  63.     btree_t futexes;    /**< B+tree of futexes referenced by this task. */
  64. };
  65.  
  66. extern spinlock_t tasks_lock;
  67. extern btree_t tasks_btree;
  68.  
  69. extern void task_init(void);
  70. extern task_t *task_create(as_t *as, char *name);
  71. extern task_t *task_run_program(void *program_addr, char *name);
  72. extern task_t *task_find_by_id(task_id_t id);
  73.  
  74. #ifndef task_create_arch
  75. extern void task_create_arch(task_t *t);
  76. #endif
  77.  
  78. extern __native sys_task_get_id(task_id_t *uspace_task_id);
  79.  
  80. #endif
  81.