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author | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-02-24 17:18:55 +0000 |
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committer | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-02-24 17:18:55 +0000 |
commit | 01e9a7be61ad5a9be0fe3a0c6c469d03ff21f51e (patch) | |
tree | 1cc6288bcc9fc4059d78dd08f870917526a68053 /file.c | |
parent | 42eeb2c1b1788c5975d2a383c9b0c3ff2c90b6b8 (diff) | |
download | ruby-01e9a7be61ad5a9be0fe3a0c6c469d03ff21f51e.tar.gz |
rdoc update.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@22607 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'file.c')
-rw-r--r-- | file.c | 13 |
1 files changed, 8 insertions, 5 deletions
@@ -3499,15 +3499,18 @@ rb_thread_flock(void *data) * * Example: * - * # write lock + * # update a counter using write lock * # don't use "w" because it truncates the file before lock. - * File.open("testfile", File::WRONLY|File::CREAT, 0644) {|f| + * File.open("counter", File::RDWR|File::CREAT, 0644) {|f| * f.flock(File::LOCK_EX) - * f.truncate(0) - * f.write "new content" + * value = f.read.to_i + 1 + * f.rewind + * f.write("#{value}\n") + * f.flush + * f.truncate(f.pos) * } * - * # read lock + * # read the counter using read lock * File.open("testfile", "r") {|f| * f.flock(File::LOCK_SH) * p f.read |