Last change
on this file since 26 was 2, checked in by Mattia Monga, 14 years ago |
Importazione sorgenti
|
-
Property svn:executable
set to
*
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File size:
641 bytes
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Line | |
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1 | SHARED_MEM=turno
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2 | echo pippo > $SHARED_MEM
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3 |
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4 | processo(){ # name other
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5 | for i in $(seq 100); do
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6 | enter_region $1 $2
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7 | critical_session $1
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8 | leave_region $1
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9 | io
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10 | done
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11 | }
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12 | critical_session(){
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13 | for i in 1 2 3; do
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14 | echo -n $1
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15 | io
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16 | done
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17 | echo .
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18 | }
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19 |
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20 | io(){
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21 | dd if=/dev/zero of=/dev/null count=1000 2>/dev/null
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22 | }
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23 |
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24 | enter_region() { # process other
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25 | echo "true" > interested_$1
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26 | echo $1 > $SHARED_MEM
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27 | while grep $1 $SHARED_MEM >/dev/null &&
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28 | grep true interested_$2 >/dev/null ;
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29 | do
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30 | true;
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31 | done
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32 | }
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33 | leave_region() { # process
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34 | echo "false" > interested_$1
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35 | }
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36 |
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37 | processo pippo pluto & processo pluto pippo &
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38 | wait
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