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root / prex-0.9.0 / usr / lib / posix / file / __file.c @ 03e9c04a

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/*
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 * Copyright (c) 2007, 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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#include <sys/prex.h>
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#include <sys/posix.h>
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#include <ipc/ipc.h>
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#include <ipc/fs.h>
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#include <stddef.h>
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object_t __fs_obj;
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/*
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 * This is called first when task is started
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 */
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void
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__file_init(void)
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{
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        int error;
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        /*
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         * Look up file system server
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         */
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        error = object_lookup("!fs", &__fs_obj);
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        if (error)
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                __fs_obj = 0;
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}
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/*
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 * Clean up
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 */
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void
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__file_exit(void)
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{
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        struct msg m;
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        /* Notify to file system server */
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        if (__fs_obj != 0) {
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                m.hdr.code = FS_EXIT;
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                msg_send(__fs_obj, &m, sizeof(m));
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        }
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}
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/*
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 * Notify to file system server.
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 * This routine is used by native task which uses file system.
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 */
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void
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fslib_init(void)
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{
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        struct msg m;
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        if (__fs_obj == 0)
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                __file_init();
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        m.hdr.code = FS_REGISTER;
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        msg_send(__fs_obj, &m, sizeof(m));
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}
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/*
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 * Clean up (native task)
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 */
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void
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fslib_exit(void)
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{
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        __file_exit();
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}
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