barb.c

来自「澳洲人写的Cortex,包括uC_IP协议栈」· C语言 代码 · 共 318 行 · 第 1/2 页

        <font color="#6920ac">/* memorise a time to go to sleep */</font>
        <a href="tick_GetSystemTime.FIND-FUNC">tick_GetSystemTime</a>(&amp;StartWait);
        
        <a href="#barb_Sleep">barb_Sleep</a>();
        
        <a href="tick_GetSystemTime.FIND-FUNC">tick_GetSystemTime</a>(&amp;SysTime);
        <font color="#6920ac">/* accumulate time the barber slept */</font>
        barb_SleepTime += ((SysTime.tv_sec * 1000 +
                            SysTime.tv_nsec/1000000) -
                           (StartWait.tv_sec * 1000 +
                            StartWait.tv_nsec/1000000));
        <font color="#6920ac">/* cutting */</font>
        SleepTime = <a href="rand.FIND-FUNC">rand</a>()%(<a href="#BARB_CUTTING_CONST">BARB_CUTTING_CONST</a>);
        
        <a href="task_Sleep.FIND-FUNC">task_Sleep</a>(SleepTime);

        <a href="#barb_CutEnd">barb_CutEnd</a>();
        
    }
    
}
<font color="#6920ac">/* main function */</font><font size="+1">
<i>crtx_Void_t</i> <b><font color="azure1"><a name="crtx_Main">crtx_Main</a></font></b>
(
    <i>crtx_Int_t</i>  ArgC_a, 
    <i>crtx_Void_t</i> *pArgV_a, 
    <i>crtx_Void_t</i> *pEnvV_a
)
{</font>
<font color="#6920ac">/*********************
 *  LOCAL VARIABLES  *
 *********************/</font>
    <i>crtx_Int_t</i>          i;
    <i>task_Attr_t</i>         TAttr;
    <i>tick_Time_t</i>         SysTime;
    <i>crtx_Char_t</i>         str[20];

<font color="#6920ac">/*********************
 *  PROCEDURE LOGIC  *
 *********************/</font>

    <font color="#6920ac">/* call the platform init function */</font>
    <a href="pltf_Init.FIND-FUNC">pltf_Init</a>(ArgC_a, pArgV_a, pEnvV_a);

    <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"\n%s (Version: %s)\n\n"</font>, <a href="syst_Copyright.FIND-FUNC">syst_Copyright</a>(), <a href="syst_VersionStr.FIND-FUNC">syst_VersionStr</a>());

    <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"Sleeping Barber (and %d customers on %d chairs):\n"</font>,
           <a href="#BARB_CUSTOMERS">BARB_CUSTOMERS</a>, <a href="#BARB_CHAIRS">BARB_CHAIRS</a>);


    <a href="memset.FIND-FUNC">memset</a>(barb_Info, 0, <i>sizeof</i>(barb_Info));

    barb_SleepTime = 0;

    <font color="#6920ac">/* create semaphores */</font>

    <font color="#6920ac">/* a semaphore for chairs, with maximum number BARB_CHAIRS */</font>
    pbarb_SemChairs = <a href="sema_Create.FIND-FUNC">sema_Create</a>(<a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>, <a href="#BARB_CHAIRS">BARB_CHAIRS</a>,
                                  <a href="#BARB_CHAIRS">BARB_CHAIRS</a>, <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>);

    <b>if</b> (pbarb_SemChairs == <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>)
    {
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"Create semaphore pbarb_SemChairs failed\n"</font>);
        <a href="exit.FIND-FUNC">exit</a>(0);
    }
    <font color="#6920ac">/* a binary semaphore for a barber */</font>
    pbarb_SemBarber = <a href="sema_Create.FIND-FUNC">sema_Create</a>(<a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>, 1, 1, <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>);

    <b>if</b> (pbarb_SemBarber == <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>)
    {
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"Create semaphore pbarb_SemBarber failed\n"</font>);
        <a href="exit.FIND-FUNC">exit</a>(0);
    }
    <font color="#6920ac">/* a binary semaphore a barber is sleeping with initial value 0 */</font>
    pbarb_SemSleep = <a href="sema_Create.FIND-FUNC">sema_Create</a>(<a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>, 0, 1, <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>);
    <b>if</b> (pbarb_SemSleep == <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>)
    {
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"Create semaphore pbarb_SemSleep failed\n"</font>);
        <a href="exit.FIND-FUNC">exit</a>(0);
    }
    <font color="#6920ac">/* a binary semaphore a barber is cutting with initial value 0 */</font>
    pbarb_Cutting = <a href="sema_Create.FIND-FUNC">sema_Create</a>(<a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>, 0, 1, <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>);
    <b>if</b> (pbarb_Cutting == <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>)
    {
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"Create semaphore pbarb_Cutting failed\n"</font>);
        <a href="exit.FIND-FUNC">exit</a>(0);
    }

    <font color="#6920ac">/* create a task ( process) a barber */</font>

    TAttr = task_AttrDefault_g;
    
    <b>if</b> (<a href="task_Create1.FIND-FUNC">task_Create1</a>((<i>task_Entry1_t</i>)barb_Barber, &amp;TAttr,
                     <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>, 0, <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>) == <a href="TASK_ILLEGAL_ID.FIND-DEF">TASK_ILLEGAL_ID</a>)
    {
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"Create task for a barber %d failed\n"</font>, i + 1);
        <a href="exit.FIND-FUNC">exit</a>(0);
    }

    <font color="#6920ac">/* create tasks for customers */</font>

    <b>for</b> (i = 0; i &lt; <a href="#BARB_CUSTOMERS">BARB_CUSTOMERS</a>; i++)
    {
        TAttr = task_AttrDefault_g;
        
        <b>if</b> (<a href="task_Create1.FIND-FUNC">task_Create1</a>((<i>task_Entry1_t</i>)barb_Customer, &amp;TAttr,
                         <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>, i, <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>) == <a href="TASK_ILLEGAL_ID.FIND-DEF">TASK_ILLEGAL_ID</a>)
        {
            <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"Create task for the customer %d failed\n"</font>, i + 1);
            <a href="exit.FIND-FUNC">exit</a>(0);
        }

    }

    <b>while</b> ( 1 )
    {
        <font color="#6920ac">/* print statistics */</font>
        <a href="tick_GetSystemTime.FIND-FUNC">tick_GetSystemTime</a>(&amp;SysTime);
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"At %02ld:%02ld:%02ld   "</font>,
               SysTime.tv_sec/3600, (SysTime.tv_sec%3600)/60,
               SysTime.tv_sec%60);

        <b>for</b> (i = 0; i &lt; <a href="#BARB_CUSTOMERS">BARB_CUSTOMERS</a>; i++)
        {
            <a href="sprintf.FIND-FUNC">sprintf</a>(str,<font color="DarkGreen">"cust#%d"</font>, i + 1);
            <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"%10s"</font>, str);
        }
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"  barber sleeps"</font>);
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"\n"</font>);
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">" %-12s "</font>,<font color="DarkGreen">"Waiting(ms)"</font>);

        <b>for</b> (i = 0; i &lt; <a href="#BARB_CUSTOMERS">BARB_CUSTOMERS</a>; i++)
        {
            <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"%10ld"</font>, barb_Info[ i ].WaitTime);
        }
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"      (ms)"</font>);
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"\n"</font>);
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">" %-12s "</font>,<font color="DarkGreen">"Sleeping(ms)"</font>);

        <b>for</b> (i = 0; i &lt; <a href="#BARB_CUSTOMERS">BARB_CUSTOMERS</a>; i++)
        {
            <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"%10ld"</font>, barb_Info[ i ].SleepTime);
        }
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"%12ld"</font>, barb_SleepTime);
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"\n"</font>);
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">" %-12s "</font>,<font color="DarkGreen">"Cut(times)"</font>);

        <b>for</b> (i = 0; i &lt; <a href="#BARB_CUSTOMERS">BARB_CUSTOMERS</a>; i++)
        {
            <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"%10ld"</font>, barb_Info[ i ].CutTimes);
        }
        <a href="printf.FIND-FUNC">printf</a>(<font color="DarkGreen">"\n"</font>);
        <a href="task_Sleep.FIND-FUNC">task_Sleep</a>(<a href="#BARB_PRINT_TIME">BARB_PRINT_TIME</a>);
    }
}

</pre>
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