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3f20e5af1d
* add join for ThreadPool without destroying the threads * Make the main Thread block waiting for the worker threads to finish instead of buzy looping and do proper initialization and freeing of all variables. * Updated test to use `atomic_store` and take into account the maximum queue size of the threadpool. * - Add `ThreadPool` join function to wait for all threads to finish in the pool without destroying the threads. - Return of Thread/Mutex/CondVar `destroy()` is now "@maydiscard" and should be ignored. It will return void in 0.8.0. - Return of Mutex `unlock()` and `lock()` is now "@maydiscard" and should be ignored. They will return void in 0.8.0. - Return of ConditionVariable `signal()` `broadcast()` and `wait()` are now "@maydiscard". They will return void in 0.8.0. - Return of Thread `detatch()` is now "@maydiscard". It will return void in 0.8.0. - Buffered/UnbufferedChannel, and both ThreadPools have `@maydiscard` on a set of functions. They will retunr void in 0.8.0. - Pthread bindings correctly return Errno instead of CInt. - Return of Thread `join()` is now "@maydiscard". --------- Co-authored-by: Christoffer Lerno <christoffer@aegik.com>
135 lines
2.9 KiB
Plaintext
135 lines
2.9 KiB
Plaintext
module std::thread::channel {Type};
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typedef UnbufferedChannel = void*;
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struct UnbufferedChannelImpl @private
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{
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Allocator allocator;
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Mutex mu;
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Type buf;
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bool closed;
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Mutex send_mu;
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usz send_waiting;
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ConditionVariable send_cond;
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Mutex read_mu;
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usz read_waiting;
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ConditionVariable read_cond;
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}
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fn void? UnbufferedChannel.init(&self, Allocator allocator)
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{
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UnbufferedChannelImpl* channel = allocator::alloc(allocator, UnbufferedChannelImpl);
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defer catch (void)allocator::free(allocator, channel);
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channel.allocator = allocator;
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channel.send_waiting = 0;
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channel.read_waiting = 0;
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channel.mu.init()!;
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defer catch channel.mu.destroy();
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channel.send_mu.init()!;
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defer catch channel.send_mu.destroy();
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channel.send_cond.init()!;
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defer catch channel.send_cond.destroy();
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channel.read_mu.init()!;
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defer catch channel.read_mu.destroy();
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channel.read_cond.init()!;
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*self = (UnbufferedChannel)channel;
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}
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fn void? UnbufferedChannel.destroy(&self) @maydiscard // Remove optional in 0.8.0
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{
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UnbufferedChannelImpl* channel = (UnbufferedChannelImpl*)(*self);
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channel.mu.destroy();
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channel.send_mu.destroy();
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channel.send_cond.destroy();
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channel.read_mu.destroy();
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channel.read_cond.destroy();
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allocator::free(channel.allocator, channel);
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*self = null;
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}
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fn void? UnbufferedChannel.push(self, Type val)
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{
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UnbufferedChannelImpl* channel = (UnbufferedChannelImpl*)self;
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channel.mu.lock();
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defer catch channel.mu.unlock();
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channel.send_mu.lock();
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defer catch channel.send_mu.unlock();
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if (channel.closed)
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{
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return thread::CHANNEL_CLOSED?;
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}
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// store value in the buffer
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channel.buf = val;
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// show that we are waiting for reader
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channel.send_waiting++;
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// if reader is already waiting for us -> awake him
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if (channel.read_waiting > 0)
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{
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channel.read_cond.signal();
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}
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// wait until reader takes value from buffer
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channel.send_cond.wait(&channel.mu);
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if (channel.closed) return thread::CHANNEL_CLOSED?;
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channel.mu.unlock();
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channel.send_mu.unlock();
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}
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fn Type? UnbufferedChannel.pop(self)
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{
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UnbufferedChannelImpl* channel = (UnbufferedChannelImpl*)self;
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channel.mu.lock();
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defer catch channel.mu.unlock();
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channel.read_mu.lock();
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defer catch channel.read_mu.unlock();
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// if no one is waiting, then there is nothing in the buffer
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while (!channel.closed && channel.send_waiting == 0)
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{
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channel.read_waiting++;
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channel.read_cond.wait(&channel.mu);
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channel.read_waiting--;
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}
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if (channel.closed) return thread::CHANNEL_CLOSED?;
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// take value from buffer
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Type ret = channel.buf;
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// awake sender
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channel.send_waiting--;
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channel.send_cond.signal();
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channel.mu.unlock();
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channel.read_mu.unlock();
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return ret;
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}
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fn void? UnbufferedChannel.close(self) @maydiscard // Remove optional in 0.8.0
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{
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UnbufferedChannelImpl* channel = (UnbufferedChannelImpl*)self;
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channel.mu.lock();
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channel.closed = true;
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channel.read_cond.broadcast();
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channel.send_cond.broadcast();
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channel.mu.unlock();
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} |