sendfrom <fromaccount> <tobitcoinaddress> <amount> [minconf=1] [comment] [comment-to]Will send the given amount to the given address, ensuring the account has a valid balance using [minconf] confirmations. Returns the transaction ID if successful (not in JSON object).
But is this function atomic? Is bitcoind / bitcoin-qt multi threaded?
If the server receives many sendfrom requests at the same time, is it safe to use?
Thank you.
edit: hope they do not use bitcoin-qt
http://www.coindesk.com/poloniex-loses-12-3-bitcoins-latest-bitcoin-exchange-hack/