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scoutos / prex-0.9.0 / sys / include / task.h @ 03e9c04a

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/*-
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 * Copyright (c) 2005-2006, Kohsuke Ohtani
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#ifndef _TASK_H
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#define _TASK_H
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#include <types.h>
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#include <sys/cdefs.h>
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#include <sys/list.h>
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#include <sys/capability.h>        /* for cap_t */
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#include <sys/sysinfo.h>
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#include <thread.h>
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#include <timer.h>
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/*
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 * Task struct
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 */
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struct task {
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        struct list        link;                /* linkage on task list in system */
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        char                name[MAXTASKNAME]; /* task name */
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        task_t                parent;                /* parent task */
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        vm_map_t        map;                /* address space description */
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        int                suscnt;                /* suspend count */
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        int                flags;                /* flags defined below */
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        cap_t                capability;        /* security permission flag */
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        struct timer        alarm;                /* timer for alarm exception */
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        void                (*handler)(int); /* pointer to exception handler */
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        struct list        threads;        /* list of threads */
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        struct list        objects;        /* IPC objects owned by this task */
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        struct list        mutexes;        /* mutexes owned by this task */
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        struct list        conds;                /* cv owned by this task */
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        struct list        sems;                /* semaphores owned by this task */
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        int                nthreads;        /* number of threads */
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        int                nobjects;        /* number of IPC objects */
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        int                nsyncs;                /* number of syncronizer objects */
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};
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#define curtask                (curthread->task)
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/* flags */
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#define TF_SYSTEM        0x00000001 /* kernel task (kern_task) */
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#define        TF_TRACE        0x00000002 /* process system call tracing active */
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#define        TF_PROFIL        0x00000004 /* has started profiling */
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#define        TF_AUDIT        0x00000008 /* audit mode */
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/* default flags */
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#ifdef CONFIG_AUDIT
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#define TF_DEFAULT        TF_AUDIT
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#else
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#define TF_DEFAULT        0
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#endif
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/* vm option for task_create(). */
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#define VM_NEW                0        /* create new memory map */
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#define VM_SHARE        1        /* share parent's memory map */
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#define VM_COPY                2        /* duplicate parent's memory map */
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__BEGIN_DECLS
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int         task_create(task_t, int, task_t *);
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int         task_terminate(task_t);
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task_t         task_self(void);
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int         task_suspend(task_t);
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int         task_resume(task_t);
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int         task_setname(task_t, const char *);
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int         task_setcap(task_t, cap_t);
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int         task_chkcap(task_t, cap_t);
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int         task_capable(cap_t);
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int         task_valid(task_t);
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int         task_access(task_t);
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int         task_info(struct taskinfo *);
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void         task_bootstrap(void);
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void         task_init(void);
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__END_DECLS
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#endif /* !_TASK_H */