Description:
added more comments on dir_init.rb
git-svn-id: http://theory.cpe.ku.ac.th/grader/web/trunk@383 6386c4cd-e34a-4fa8-8920-d93eb39b512e
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[Not Reviewed]
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Author
jittat
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r180:a8ad25e1c3fc - - 1 file changed: 19 inserted, 0 deleted
| @@ -9,12 +9,31 | |||
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9 | 9 | # job. Problems may occur when the first process delete the files |
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10 | 10 | # while the second process is still using the files. |
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11 | 11 | # |
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12 | 12 | # This library maintain a reference counter on the processes using the |
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13 | 13 | # directory. It locks the dir to manage critical section when |
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14 | 14 | # updating the reference counter. |
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15 | + # | |
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16 | + # Example usage: | |
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17 | + # | |
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18 | + # dman = DirInit::Manager.new("mydir") | |
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19 | + # | |
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20 | + # dman.setup do | |
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21 | + # # do some initialization | |
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22 | + # end | |
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23 | + # | |
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24 | + # #... do anything you want | |
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25 | + # | |
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26 | + # dman.teardown do | |
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27 | + # # clean up | |
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28 | + # end | |
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29 | + # | |
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30 | + # DirInit::Manager ensures that the block passed to <tt>setup</tt> | |
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31 | + # only runs once by the first process in the concurrent dir usage and | |
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32 | + # block passed to <tt>teardown</tt> runs once by the last process in | |
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33 | + # that concurrent activities leaving that dir. | |
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15 | 34 | |
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16 | 35 | module DirInit |
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17 | 36 | |
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18 | 37 | class Manager |
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19 | 38 | |
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20 | 39 | def initialize(dir_name, usage_filename='.usage_counter') |
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