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rt: Randomize port selection

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This commit is contained in:
Brian Anderson 2012-02-14 22:57:27 -08:00
parent 601f7144d8
commit 96af6f05a1
1 changed files with 6 additions and 2 deletions
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8
src/rt/rust_port_selector.cpp
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@ -26,8 +26,11 @@ rust_port_selector::select(rust_task *task, rust_port **dptr,
// block the task before any of them can try to send another
// message.
// Start looking for ports from a different index each time.
size_t j = isaac_rand(&task->thread->rctx);
for (size_t i = 0; i < n_ports; i++) {
rust_port *port = ports[i];
size_t k = (i + j) % n_ports;
rust_port *port = ports[k];
I(task->thread, port != NULL);
port->lock.lock();
@ -50,7 +53,8 @@ rust_port_selector::select(rust_task *task, rust_port **dptr,
}
for (size_t i = 0; i < locks_taken; i++) {
rust_port *port = ports[i];
size_t k = (i + j) % n_ports;
rust_port *port = ports[k];
port->lock.unlock();
}
}