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atomic.hpp: implement wait callback interface

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Will be used to wake up threads uniformly.
This commit is contained in:
Nekotekina 2019-09-08 22:48:26 +03:00
parent 53e7f6c5a5
commit 1668d6ee1b
2 changed files with 28 additions and 26 deletions
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50
rpcs3/util/atomic.cpp
View File

@ -18,6 +18,12 @@ static constexpr s64 s_waiter_mask = 0x3fff;
// Implementation detail (remaining bits out of 32)
static constexpr s64 s_signal_mask = 0xffffffff & ~s_waiter_mask;
// Callback for wait() function, returns false if wait should return
static thread_local bool(*s_tls_wait_cb)(const void* data) = [](const void*)
{
return true;
};
static inline bool ptr_cmp(const void* data, std::size_t size, u64 old_value)
{
switch (size)
@ -73,7 +79,7 @@ namespace
// Update node key
s_tls_waiter.key() = data;
if (std::unique_lock lock(wmap.mutex); ptr_cmp(data, size, old_value))
if (std::unique_lock lock(wmap.mutex); ptr_cmp(data, size, old_value) && s_tls_wait_cb(data))
{
// Add node to the waiter list
std::condition_variable& cond = wmap.list.insert(std::move(s_tls_waiter))->second.cond;
@ -140,14 +146,6 @@ void atomic_storage_futex::notify_all(const void* data)
void atomic_storage_futex::wait(const void* data, std::size_t size, u64 old_value)
{
#ifdef _WIN32
if (OptWaitOnAddress)
{
OptWaitOnAddress(const_cast<volatile void*>(data), &old_value, size, INFINITE);
return;
}
#endif
const std::intptr_t iptr = reinterpret_cast<std::intptr_t>(data);
atomic_t<s64>& entry = s_hashtable[iptr % s_hashtable_size];
@ -182,7 +180,7 @@ void atomic_storage_futex::wait(const void* data, std::size_t size, u64 old_valu
return;
}
if (ptr_cmp(data, size, old_value))
if (ptr_cmp(data, size, old_value) && s_tls_wait_cb(data))
{
#ifdef _WIN32
NtWaitForKeyedEvent(nullptr, &entry, false, nullptr);
@ -234,14 +232,6 @@ void atomic_storage_futex::wait(const void* data, std::size_t size, u64 old_valu
void atomic_storage_futex::notify_one(const void* data)
{
#ifdef _WIN32
if (OptWaitOnAddress)
{
OptWakeByAddressSingle(const_cast<void*>(data));
return;
}
#endif
const std::intptr_t iptr = reinterpret_cast<std::intptr_t>(data);
atomic_t<s64>& entry = s_hashtable[iptr % s_hashtable_size];
@ -295,14 +285,6 @@ void atomic_storage_futex::notify_one(const void* data)
void atomic_storage_futex::notify_all(const void* data)
{
#ifdef _WIN32
if (OptWaitOnAddress)
{
OptWakeByAddressAll(const_cast<void*>(data));
return;
}
#endif
const std::intptr_t iptr = reinterpret_cast<std::intptr_t>(data);
atomic_t<s64>& entry = s_hashtable[iptr % s_hashtable_size];
@ -339,3 +321,19 @@ void atomic_storage_futex::notify_all(const void* data)
}
#endif
void atomic_storage_futex::set_wait_callback(bool(*cb)(const void* data))
{
if (cb)
{
s_tls_wait_cb = cb;
}
}
void atomic_storage_futex::raw_notify(const void* data)
{
if (data)
{
notify_all(data);
}
}

4
rpcs3/util/atomic.hpp
View File

@ -17,6 +17,10 @@ private:
static void wait(const void* data, std::size_t size, u64 old_value);
static void notify_one(const void* data);
static void notify_all(const void* data);
public:
static void set_wait_callback(bool(*)(const void* data));
static void raw_notify(const void* data);
};
// Helper class, provides access to compiler-specific atomic intrinsics