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DEV: atomic strength for queues

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This commit is contained in:
hoo2
2021-09-30 19:19:44 +03:00
parent d2f8165ec6
commit d9da3917a9
6 changed files with 139 additions and 41 deletions
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include/cont/deque.h
+24 -29
View File
@@ -86,13 +86,18 @@ class deque {
constexpr deque () noexcept :
data_{},
f{data_.data(), N},
r{data_.data()} { }
r{data_.data()} {
if constexpr (SemiAtomic)
std::atomic_thread_fence(std::memory_order_release);
}
//! fill contructor
constexpr deque(const Data_t& value) noexcept {
data_.fill(value);
f = iterator(data_.data(), N);
r = iterator(data_.data(), N);
if constexpr (SemiAtomic)
std::atomic_thread_fence(std::memory_order_release);
}
//! Initializer list contructor
@@ -100,7 +105,10 @@ class deque {
constexpr deque(It&& ...it) noexcept :
data_{{std::forward<It>(it)...}},
f(data_.data(), N),
r(data_.data(), sizeof...(It)) { }
r(data_.data(), sizeof...(It)) {
if constexpr (SemiAtomic)
std::atomic_thread_fence(std::memory_order_release);
}
deque(const deque&) = delete; //!< No copies
deque& operator= (const deque&) = delete; //!< No copy assignments
@@ -132,10 +140,10 @@ class deque {
public:
//! \return The size of the deque. The items currently in queue.
constexpr size_t size() noexcept {
return full() ? N: (r - f) -1;
return r - (f +1);
}
constexpr size_t size() const noexcept {
return full() ? N: (r - f) -1;
return r - (f +1);
}
//! \return The maximum size of the deque. The items the queue can hold.
constexpr size_t max_size() noexcept { return N; }
@@ -144,11 +152,8 @@ class deque {
//! \return True if the deque is empty
constexpr bool empty() noexcept { return size() == 0 ? true : false; }
//! \return True if the deque is full
constexpr bool full() noexcept {
if constexpr (SemiAtomic)
std::atomic_thread_fence(std::memory_order_acquire);
return (r == f) ? true : false;
}
constexpr bool full() noexcept { return size() == N ? true : false; }
//! @}
//! \name Member access
@@ -166,36 +171,26 @@ class deque {
//! \param it The item to push
constexpr void push_front (const Data_t& it) noexcept {
if (full()) return;
if constexpr (SemiAtomic)
std::atomic_thread_fence(std::memory_order_acquire);
*f-- = it;
if constexpr (SemiAtomic)
std::atomic_thread_fence(std::memory_order_release);
}
//! \brief Extract an item from the front of the deque and remove it from the deque
//! \param it The item to push
constexpr Data_t pop_front () noexcept {
if (empty()) return Data_t{};
if constexpr (SemiAtomic)
std::atomic_thread_fence(std::memory_order_acquire);
return *++f;
*f = it;
--f; // keep this separate for thread safety
}
//! \brief Push an item in the back of the deque
//! \param it The item to push
constexpr void push_back (const Data_t& it) noexcept {
if (full()) return;
if constexpr (SemiAtomic)
std::atomic_thread_fence(std::memory_order_acquire);
*r++ = it;
if constexpr (SemiAtomic)
std::atomic_thread_fence(std::memory_order_release);
*r = it;
++r; // keep this separate for thread safety
}
//! \brief Extract an item from the front of the deque and remove it from the deque
//! \param it The item to push
constexpr Data_t pop_front () noexcept {
if (empty()) return Data_t{};
return *++f;
}
//! \brief Extract an item from the back of the deque and remove it from the deque
//! \param it The item to push
constexpr Data_t pop_back () noexcept {
if (empty()) return Data_t{};
if constexpr (SemiAtomic)
std::atomic_thread_fence(std::memory_order_acquire);
return *--r;
}
include/cont/edeque.h
+5 -5
View File
@@ -191,21 +191,21 @@ class edeque : public deque<Data_t, N, SemiAtomic> {
}
//! @}
//! \name Base class overwrites
//! \name Base class uses and overwrites
//! @{
void push_front (const Data_t& it) noexcept {
base_type::push_front(it);
check_trigger_push_async_(it);
}
void push_back (const Data_t& it) noexcept {
base_type::push_back(it);
check_trigger_push_async_(it);
}
Data_t pop_front () noexcept {
Data_t t = base_type::pop_front();
check_trigger_pop_async_(t);
return t;
}
void push_back (const Data_t& it) noexcept {
base_type::push_back(it);
check_trigger_push_async_(it);
}
Data_t pop_back () noexcept {
Data_t t = base_type::pop_back();
check_trigger_pop_async_(t);