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From: "daydreamer" <sundaresh.venugopal@gmail.com>
Newsgroups: comp.databases
Subject: Thread safe
Message-ID: <20130214035600392@webuse.net>
Date: Thu, 14 Feb 2013 03:56:00 GMT
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Xref: csiph.com comp.databases:352

I have a tree of recursive small hash tables. A small part of each hash
table is stored in memory and the actual tables, in a file. This is for
a simple experimental hash/trie based database organization.I wish to
make this database thread safe. I intend to do so at the hash table
level, to permit several threads to simultaneously read the hash table,
but only one thread at a time to write or change the hash table. What is
the best way to do accomplish this ? Also what happens if a thread
holding a write
lock on a hash table is abruptly terminated, never releasing that lock,
for other threads to access the table ? 

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