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Annotation of kernel/kern/task.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /* 
        !            26:  * Mach Operating System
        !            27:  * Copyright (c) 1993-1988 Carnegie Mellon University
        !            28:  * All Rights Reserved.
        !            29:  * 
        !            30:  * Permission to use, copy, modify and distribute this software and its
        !            31:  * documentation is hereby granted, provided that both the copyright
        !            32:  * notice and this permission notice appear in all copies of the
        !            33:  * software, derivative works or modified versions, and any portions
        !            34:  * thereof, and that both notices appear in supporting documentation.
        !            35:  * 
        !            36:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
        !            37:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
        !            38:  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
        !            39:  * 
        !            40:  * Carnegie Mellon requests users of this software to return to
        !            41:  * 
        !            42:  *  Software Distribution Coordinator  or  [email protected]
        !            43:  *  School of Computer Science
        !            44:  *  Carnegie Mellon University
        !            45:  *  Pittsburgh PA 15213-3890
        !            46:  * 
        !            47:  * any improvements or extensions that they make and grant Carnegie Mellon
        !            48:  * the rights to redistribute these changes.
        !            49:  */
        !            50: /*
        !            51:  *     File:   task.h
        !            52:  *     Author: Avadis Tevanian, Jr.
        !            53:  *
        !            54:  *     This file contains the structure definitions for tasks.
        !            55:  *
        !            56:  */
        !            57: 
        !            58: #ifndef        _KERN_TASK_H_
        !            59: #define _KERN_TASK_H_
        !            60: 
        !            61: #import <mach/features.h>
        !            62: 
        !            63: #include <mach/boolean.h>
        !            64: #include <mach/port.h>
        !            65: #include <mach/time_value.h>
        !            66: #include <mach/mach_param.h>
        !            67: #include <mach/task_info.h>
        !            68: #include <kern/kern_types.h>
        !            69: #include <kern/lock.h>
        !            70: #include <kern/queue.h>
        !            71: #include <kern/processor.h>
        !            72: #include <vm/vm_map.h>
        !            73: 
        !            74: struct task {
        !            75:        /* Synchronization/destruction information */
        !            76:        decl_simple_lock_data(,lock)    /* Task's lock */
        !            77:        int             ref_count;      /* Number of references to me */
        !            78:        boolean_t       active;         /* Task has not been terminated */
        !            79: 
        !            80:        /* Miscellaneous */
        !            81:        vm_map_t        map;            /* Address space description */
        !            82:        queue_chain_t   pset_tasks;     /* list of tasks assigned to pset */
        !            83:        int             suspend_count;  /* Internal scheduling only */
        !            84: 
        !            85:        /* Thread information */
        !            86:        queue_head_t    thread_list;    /* list of threads */
        !            87:        int             thread_count;   /* number of threads */
        !            88:        decl_simple_lock_data(,thread_list_lock) /* XXX thread_list lock */
        !            89:        processor_set_t processor_set;  /* processor set for new threads */
        !            90:        boolean_t       may_assign;     /* can assigned pset be changed? */
        !            91:        boolean_t       assign_active;  /* waiting for may_assign */
        !            92: 
        !            93:        /* Garbage */
        !            94:        struct proc     *proc;          /* corresponding process */
        !            95: 
        !            96:        /* Task-wide thread context information */
        !            97:        struct
        !            98:            pcb_common  *pcb_common;
        !            99: 
        !           100:        /* User-visible scheduling information */
        !           101:        int             user_stop_count;        /* outstanding stops */
        !           102:        int             priority;               /* for new threads */
        !           103: 
        !           104:        /* Information for kernel-internal tasks */
        !           105:        boolean_t       kernel_privilege; /* Is a kernel task */
        !           106:        boolean_t       kernel_vm_space; /* Uses kernel's pmap? */
        !           107: 
        !           108:        /* Statistics */
        !           109:        time_value_t    total_user_time;
        !           110:                                /* total user time for dead threads */
        !           111:        time_value_t    total_system_time;
        !           112:                                /* total system time for dead threads */
        !           113: 
        !           114:        /* IPC structures */
        !           115:        decl_simple_lock_data(, itk_lock_data)
        !           116:        struct ipc_port *itk_self;      /* not a right, doesn't hold ref */
        !           117:        struct ipc_port *itk_sself;     /* a send right */
        !           118:        struct ipc_port *itk_exception; /* a send right */
        !           119:        struct ipc_port *itk_bootstrap; /* a send right */
        !           120:        struct ipc_port *itk_registered[TASK_PORT_REGISTER_MAX];
        !           121:                                        /* all send rights */
        !           122: 
        !           123:        struct ipc_space *itk_space;
        !           124: 
        !           125: #if    NORMA_TASK
        !           126:        long            child_node;     /* if != -1, node for new children */
        !           127: #endif /* NORMA_TASK */
        !           128: };
        !           129: 
        !           130: #define task_lock(task)                simple_lock(&(task)->lock)
        !           131: #define task_unlock(task)      simple_unlock(&(task)->lock)
        !           132: 
        !           133: #define        itk_lock_init(task)     simple_lock_init(&(task)->itk_lock_data)
        !           134: #define        itk_lock(task)          simple_lock(&(task)->itk_lock_data)
        !           135: #define        itk_unlock(task)        simple_unlock(&(task)->itk_lock_data)
        !           136: 
        !           137: #define ipc_task_lock(t)       simple_lock(&(t)->ipc_translation_lock)
        !           138: #define ipc_task_unlock(t)     simple_unlock(&(t)->ipc_translation_lock)
        !           139: 
        !           140: /*
        !           141:  *     Exported routines/macros
        !           142:  */
        !           143: 
        !           144: extern kern_return_t   task_create();
        !           145: extern kern_return_t   task_terminate();
        !           146: extern kern_return_t   task_suspend();
        !           147: extern kern_return_t   task_resume();
        !           148: extern kern_return_t   task_threads();
        !           149: extern kern_return_t   task_ports();
        !           150: extern kern_return_t   task_info();
        !           151: extern kern_return_t   task_get_special_port();
        !           152: extern kern_return_t   task_set_special_port();
        !           153: extern kern_return_t   task_assign();
        !           154: extern kern_return_t   task_assign_default();
        !           155: 
        !           156: /*
        !           157:  *     Internal only routines
        !           158:  */
        !           159: 
        !           160: extern void            task_init();
        !           161: extern void            task_reference();
        !           162: extern void            task_deallocate();
        !           163: extern kern_return_t   task_hold();
        !           164: extern kern_return_t   task_dowait();
        !           165: extern kern_return_t   task_release();
        !           166: extern kern_return_t   task_halt();
        !           167: 
        !           168: extern kern_return_t   task_suspend_nowait();
        !           169: extern task_t          kernel_task_create();
        !           170: 
        !           171: extern task_t  kernel_task;
        !           172: 
        !           173: #endif /* _KERN_TASK_H_ */

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