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waiter_map reintroduced, combined with vm

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Nekotekina 2015-07-15 14:58:13 +03:00
parent a8fcf71f9c
commit 1e021cdbba
7 changed files with 414 additions and 199 deletions
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55
Utilities/Thread.h
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@ -97,61 +97,6 @@ public:
using thread_t::is_current;
};
struct waiter_map_t
{
static const size_t size = 16;
std::array<std::mutex, size> mutexes;
std::array<std::condition_variable, size> cvs;
const std::string name;
waiter_map_t(const char* name)
: name(name)
{
}
// generate simple "hash" for mutex/cv distribution
u32 get_hash(u32 addr)
{
addr ^= addr >> 16;
addr ^= addr >> 24;
addr ^= addr >> 28;
return addr % size;
}
void check_emu_status(u32 addr);
// wait until pred() returns true, `addr` is an arbitrary number
template<typename F, typename... Args> safe_buffers auto wait_op(u32 addr, F pred, Args&&... args) -> decltype(static_cast<void>(pred(args...)))
{
const u32 hash = get_hash(addr);
// set mutex locker
std::unique_lock<std::mutex> lock(mutexes[hash], std::defer_lock);
while (true)
{
// check the condition
if (pred(args...)) return;
check_emu_status(addr);
if (!lock)
{
lock.lock();
continue;
}
// wait on an appropriate cond var for 1 ms or until a signal arrived
cvs[hash].wait_for(lock, std::chrono::milliseconds(1));
}
}
// signal all threads waiting on wait_op() with the same `addr` (signaling only hints those threads that corresponding conditions are *probably* met)
void notify(u32 addr);
};
extern const std::function<bool()> SQUEUE_ALWAYS_EXIT;
extern const std::function<bool()> SQUEUE_NEVER_EXIT;