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1a04310f80
A number of simplifications of mailboxes now that the interface is much simpler, and synchronous. * call and respond can now only transfer one handle at a time * mailbox objects got rid of the message queue, and just have wait_queues of blocked threads, and a reply_to map. * threads now have a message_data struct on them for use by mailboxes
53 lines
1.2 KiB
C++
53 lines
1.2 KiB
C++
#pragma once
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/// \file wait_queue.h
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/// Class and related defintions for keeping a queue of waiting threads
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#include <util/deque.h>
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#include <util/spinlock.h>
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namespace obj {
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class thread;
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}
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class wait_queue
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{
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public:
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/// Wake all threads when destructing
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~wait_queue();
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/// Add the given thread to the queue. Locks the
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/// queue lock.
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void add_thread(obj::thread *t);
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/// Pops the next waiting thread off the queue.
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/// Locks the queue lock.
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inline obj::thread * pop_next() {
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util::scoped_lock lock {m_lock};
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return pop_next_unlocked();
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}
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/// Get the next waiting thread. Does not lock the
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/// queue lock.
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obj::thread * get_next_unlocked();
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/// Pop the next thread off the queue. Does not
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/// lock the queue lock.
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obj::thread * pop_next_unlocked();
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/// Get the spinlock to lock this queue
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util::spinlock & get_lock() { return m_lock; }
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/// Wake and clear out all threads.
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/// \arg value The value passed to thread::wake
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void clear(uint64_t value = 0);
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private:
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/// Get rid of any exited threads that are next
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/// in the queue. Caller must hold the queue lock.
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void pop_exited();
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util::spinlock m_lock;
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util::deque<obj::thread*, 6> m_threads;
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};
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