diff options
author | 2019-03-26 11:13:37 +1100 | |
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committer | 2019-03-26 11:13:37 +1100 | |
commit | 97b67170277437131adf6ed4d60139c172529e4f (patch) | |
tree | 7a5cbf608f191075f1612b1af15832c206a3fe2d /src/lib/netlist/plib/palloc.h | |
parent | b380514764cf857469bae61c11143a19f79a74c5 (diff) |
(nw) Clean up the mess on master
This effectively reverts b380514764cf857469bae61c11143a19f79a74c5 and
c24473ddff715ecec2e258a6eb38960cf8c8e98e, restoring the state at
598cd5227223c3b04ca31f0dbc1981256d9ea3ff.
Before pushing, please check that what you're about to push is sane.
Check your local commit log and ensure there isn't anything out-of-place
before pushing to mainline. When things like this happen, it wastes
everyone's time. I really don't need this in a week when real work⢠is
busting my balls and I'm behind where I want to be with preparing for
MAME release.
Diffstat (limited to 'src/lib/netlist/plib/palloc.h')
-rw-r--r-- | src/lib/netlist/plib/palloc.h | 513 |
1 files changed, 384 insertions, 129 deletions
diff --git a/src/lib/netlist/plib/palloc.h b/src/lib/netlist/plib/palloc.h index a35bc50ff17..15fede3a99b 100644 --- a/src/lib/netlist/plib/palloc.h +++ b/src/lib/netlist/plib/palloc.h @@ -8,172 +8,427 @@ #ifndef PALLOC_H_ #define PALLOC_H_ +#include "pconfig.h" #include "pstring.h" +#include "ptypes.h" -#include <vector> +#include <cstddef> +#include <cstdlib> #include <memory> +#include <type_traits> +#include <utility> +#include <vector> + +#if defined(_WIN32) || defined(_WIN64) || defined(_MSC_VER) +#include <malloc.h> +#endif namespace plib { -//============================================================ -// Memory allocation -//============================================================ - -template<typename T, typename... Args> -T *palloc(Args&&... args) -{ - return new T(std::forward<Args>(args)...); -} - -template<typename T> -void pfree(T *ptr) -{ - delete ptr; -} - -template<typename T> -T* palloc_array(const std::size_t num) -{ - return new T[num](); -} - -template<typename T> -void pfree_array(T *ptr) -{ - delete [] ptr; -} - -template<typename T, typename... Args> -std::unique_ptr<T> make_unique(Args&&... args) -{ - return std::unique_ptr<T>(new T(std::forward<Args>(args)...)); -} - -template<typename BC, typename DC, typename... Args> -static std::unique_ptr<BC> make_unique_base(Args&&... args) -{ - std::unique_ptr<BC> ret(new DC(std::forward<Args>(args)...)); - return ret; -} - -template <typename SC> -class owned_ptr -{ -private: - owned_ptr() - : m_ptr(nullptr), m_is_owned(true) { } -public: - owned_ptr(SC *p, bool owned) noexcept - : m_ptr(p), m_is_owned(owned) - { } - - owned_ptr(const owned_ptr &r) = delete; - owned_ptr & operator =(owned_ptr &r) = delete; - - template<typename DC> - owned_ptr & operator =(owned_ptr<DC> &&r) + //============================================================ + // Standard arena_deleter + //============================================================ + + template <typename P, typename T> + struct arena_deleter + { + //using arena_storage_type = P *; + using arena_storage_type = typename std::conditional<P::is_stateless, P, P *>::type; + template <typename X, typename Y = void> + typename std::enable_if<!X::is_stateless, X&>::type getref(X *x) { return *x;} + template <typename X, typename Y = void *> + typename std::enable_if<std::remove_pointer<X>::type::is_stateless, X&>::type + getref(X &x, Y y = nullptr) + { + unused_var(y); + return x; + } + + constexpr arena_deleter(arena_storage_type a = arena_storage_type()) noexcept + : m_a(a) { } + + template<typename PU, typename U, typename = typename + std::enable_if<std::is_convertible< U*, T*>::value>::type> + arena_deleter(const arena_deleter<PU, U> &rhs) noexcept : m_a(rhs.m_a) { } + + void operator()(T *p) //const + { + /* call destructor */ + p->~T(); + getref(m_a).deallocate(p); + } + //private: + arena_storage_type m_a; + }; + + //============================================================ + // owned_ptr: smart pointer with ownership information + //============================================================ + + template <typename SC, typename D> + class owned_ptr + { + public: + + using pointer = SC *; + using element_type = SC; + using deleter_type = D; + + owned_ptr() + : m_ptr(nullptr), m_deleter(), m_is_owned(true) { } + + template <typename, typename> + friend class owned_ptr; + + owned_ptr(pointer p, bool owned) noexcept + : m_ptr(p), m_deleter(), m_is_owned(owned) + { } + + owned_ptr(pointer p, bool owned, D deleter) noexcept + : m_ptr(p), m_deleter(deleter), m_is_owned(owned) + { } + + + owned_ptr(const owned_ptr &r) = delete; + owned_ptr & operator =(owned_ptr &r) = delete; + + template<typename DC, typename DC_D> + owned_ptr & operator =(owned_ptr<DC, DC_D> &&r) + { + if (m_is_owned && (m_ptr != nullptr)) + //delete m_ptr; + m_deleter(m_ptr); + m_is_owned = r.m_is_owned; + m_ptr = r.m_ptr; + m_deleter = r.m_deleter; + r.m_is_owned = false; + r.m_ptr = nullptr; + return *this; + } + + owned_ptr(owned_ptr &&r) noexcept + : m_ptr(r.m_ptr) + , m_deleter(r.m_deleter) + , m_is_owned(r.m_is_owned) + { + r.m_is_owned = false; + r.m_ptr = nullptr; + } + + owned_ptr &operator=(owned_ptr &&r) noexcept + { + if (m_is_owned && (m_ptr != nullptr)) + //delete m_ptr; + m_deleter(m_ptr); + m_is_owned = r.m_is_owned; + m_ptr = r.m_ptr; + m_deleter = std::move(r.m_deleter); + r.m_is_owned = false; + r.m_ptr = nullptr; + return *this; + } + + template<typename DC, typename DC_D> + owned_ptr(owned_ptr<DC, DC_D> &&r) noexcept + : m_ptr(static_cast<pointer >(r.get())) + , m_deleter(r.m_deleter) + , m_is_owned(r.is_owned()) + { + r.release(); + } + + ~owned_ptr() noexcept + { + if (m_is_owned && (m_ptr != nullptr)) + { + //delete m_ptr; + m_deleter(m_ptr); + } + m_is_owned = false; + m_ptr = nullptr; + } + + /** + * \brief Return @c true if the stored pointer is not null. + */ + explicit operator bool() const noexcept { return m_ptr != nullptr; } + + pointer release() + { + pointer tmp = m_ptr; + m_is_owned = false; + m_ptr = nullptr; + return tmp; + } + + bool is_owned() const { return m_is_owned; } + + pointer operator ->() const noexcept { return m_ptr; } + typename std::add_lvalue_reference<element_type>::type operator *() const noexcept { return *m_ptr; } + pointer get() const noexcept { return m_ptr; } + + deleter_type& get_deleter() noexcept { return m_deleter; } + const deleter_type& get_deleter() const noexcept { return m_deleter; } + + private: + pointer m_ptr; + D m_deleter; + bool m_is_owned; + }; + + //============================================================ + // Arena allocator for use with containers + //============================================================ + + template <class ARENA, class T, std::size_t ALIGN = alignof(T)> + class arena_allocator { - if (m_is_owned && (m_ptr != nullptr)) - delete m_ptr; - m_is_owned = r.m_is_owned; - m_ptr = r.m_ptr; - r.m_is_owned = false; - r.m_ptr = nullptr; - return *this; + public: + using value_type = T; + static constexpr const std::size_t align_size = ALIGN; + using arena_type = ARENA; + + static_assert(align_size >= alignof(T) && (align_size % alignof(T)) == 0, + "ALIGN must be greater than alignof(T) and a multiple"); + + arena_allocator() noexcept + : m_a(arena_type::instance()) + { } + + ~arena_allocator() noexcept = default; + + arena_allocator(const arena_allocator &rhs) noexcept = default; + arena_allocator& operator=(const arena_allocator&) noexcept = delete; + + arena_allocator(arena_allocator&&) noexcept = default; + arena_allocator& operator=(arena_allocator&&) = delete; + + arena_allocator(arena_type & a) noexcept : m_a(a) + { + } + + template <class U> + arena_allocator(const arena_allocator<ARENA, U, ALIGN>& rhs) noexcept + : m_a(rhs.m_a) + { + } + + template <class U> struct rebind + { + using other = arena_allocator<ARENA, U, ALIGN>; + }; + + T* allocate(std::size_t n) + { + return reinterpret_cast<T *>(m_a.allocate(ALIGN, sizeof(T) * n)); + } + + void deallocate(T* p, std::size_t n) noexcept + { + unused_var(n); + m_a.deallocate(p); + } + + template <class AR1, class T1, std::size_t A1, class AR2, class T2, std::size_t A2> + friend bool operator==(const arena_allocator<AR1, T1, A1>& lhs, + const arena_allocator<AR2, T2, A2>& rhs) noexcept; + + template <class AU, class U, std::size_t A> friend class arena_allocator; + private: + arena_type &m_a; + }; + + template <class AR1, class T1, std::size_t A1, class AR2, class T2, std::size_t A2> + inline bool operator==(const arena_allocator<AR1, T1, A1>& lhs, + const arena_allocator<AR2, T2, A2>& rhs) noexcept + { + return A1 == A2 && rhs.m_a == lhs.m_a; + } + template <class AR1, class T1, std::size_t A1, class AR2, class T2, std::size_t A2> + inline bool operator!=(const arena_allocator<AR1, T1, A1>& lhs, + const arena_allocator<AR2, T2, A2>& rhs) noexcept + { + return !(lhs == rhs); } - owned_ptr(owned_ptr &&r) noexcept + //============================================================ + // Memory allocation + //============================================================ + + struct aligned_arena { - m_is_owned = r.m_is_owned; - m_ptr = r.m_ptr; - r.m_is_owned = false; - r.m_ptr = nullptr; + static constexpr const bool is_stateless = true; + template <class T, std::size_t ALIGN = alignof(T)> + using allocator_type = arena_allocator<aligned_arena, T, ALIGN>; + + template <typename T> + using owned_pool_ptr = plib::owned_ptr<T, arena_deleter<aligned_arena, T>>; + + static inline aligned_arena &instance() + { + static aligned_arena s_arena; + return s_arena; + } + + static inline void *allocate( size_t alignment, size_t size ) + { + #if (USE_ALIGNED_ALLOCATION) + #if defined(_WIN32) || defined(_WIN64) || defined(_MSC_VER) + return _aligned_malloc(size, alignment); + #elif defined(__APPLE__) + void* p; + if (::posix_memalign(&p, alignment, size) != 0) { + p = nullptr; + } + return p; + #else + return aligned_alloc(alignment, size); + #endif + #else + unused_var(alignment); + return ::operator new(size); + #endif + } + + static inline void deallocate( void *ptr ) + { + #if (USE_ALIGNED_ALLOCATION) + // NOLINTNEXTLINE(cppcoreguidelines-no-malloc) + free(ptr); + #else + ::operator delete(ptr); + #endif + } + + template<typename T, typename... Args> + owned_pool_ptr<T> make_poolptr(Args&&... args) + { + auto *mem = allocate(alignof(T), sizeof(T)); + return owned_pool_ptr<T>(new (mem) T(std::forward<Args>(args)...), true, arena_deleter<aligned_arena, T>(*this)); + } + + }; + + template <typename T, std::size_t ALIGN> + /*inline */ C14CONSTEXPR T *assume_aligned_ptr(T *p) noexcept + { + static_assert(ALIGN >= alignof(T), "Alignment must be greater or equal to alignof(T)"); + static_assert(is_pow2(ALIGN), "Alignment must be a power of 2"); + //auto t = reinterpret_cast<std::uintptr_t>(p); + //if (t & (ALIGN-1)) + // printf("alignment error!"); +#if (USE_ALIGNED_HINTS) + return reinterpret_cast<T *>(__builtin_assume_aligned(p, ALIGN)); +#else + return p; +#endif } - template<typename DC> - owned_ptr(owned_ptr<DC> &&r) noexcept + template <typename T, std::size_t ALIGN> + constexpr const T *assume_aligned_ptr(const T *p) noexcept { - m_ptr = static_cast<SC *>(r.get()); - m_is_owned = r.is_owned(); - r.release(); + static_assert(ALIGN >= alignof(T), "Alignment must be greater or equal to alignof(T)"); + static_assert(is_pow2(ALIGN), "Alignment must be a power of 2"); +#if (USE_ALIGNED_HINTS) + return reinterpret_cast<const T *>(__builtin_assume_aligned(p, ALIGN)); +#else + return p; +#endif } - ~owned_ptr() + // FIXME: remove + template<typename T, typename... Args> + inline T *pnew(Args&&... args) { - if (m_is_owned && (m_ptr != nullptr)) - delete m_ptr; - m_is_owned = false; - m_ptr = nullptr; + auto *p = aligned_arena::allocate(alignof(T), sizeof(T)); + return new(p) T(std::forward<Args>(args)...); } - template<typename DC, typename... Args> - static owned_ptr Create(Args&&... args) + + template<typename T> + inline void pdelete(T *ptr) { - owned_ptr a; - DC *x = new DC(std::forward<Args>(args)...); - a.m_ptr = static_cast<SC *>(x); - return std::move(a); + ptr->~T(); + aligned_arena::deallocate(ptr); } - template<typename... Args> - static owned_ptr Create(Args&&... args) + + template <typename T> + using unique_ptr = std::unique_ptr<T, arena_deleter<aligned_arena, T>>; + + template<typename T, typename... Args> + plib::unique_ptr<T> make_unique(Args&&... args) { - owned_ptr a; - a.m_ptr = new SC(std::forward<Args>(args)...); - return std::move(a); + return plib::unique_ptr<T>(pnew<T>(std::forward<Args>(args)...)); } - SC * release() + +#if 0 + template<typename T, typename... Args> + static owned_ptr<T> make_owned(Args&&... args) { - SC *tmp = m_ptr; - m_is_owned = false; - m_ptr = nullptr; - return tmp; + return owned_ptr<T>(pnew<T>(std::forward<Args>(args)...), true); } +#endif + - bool is_owned() const { return m_is_owned; } + template <class T, std::size_t ALIGN = alignof(T)> + using aligned_allocator = aligned_arena::allocator_type<T, ALIGN>; - SC * operator ->() const { return m_ptr; } - SC & operator *() const { return *m_ptr; } - SC * get() const { return m_ptr; } -private: - SC *m_ptr; - bool m_is_owned; -}; + //============================================================ + // traits to determine alignment size and stride size + // from types supporting alignment + //============================================================ -class mempool -{ -private: - struct block + PDEFINE_HAS_MEMBER(has_align, align_size); + + template <typename T, typename X = void> + struct align_traits { - block() : m_num_alloc(0), m_free(0), cur_ptr(nullptr), data(nullptr) { } - std::size_t m_num_alloc; - std::size_t m_free; - char *cur_ptr; - char *data; + static constexpr const std::size_t align_size = alignof(std::max_align_t); + static constexpr const std::size_t value_size = sizeof(typename T::value_type); + static constexpr const std::size_t stride_size = lcm(align_size, value_size) / value_size; }; - size_t new_block(); - size_t mininfosize(); - - struct info + template <typename T> + struct align_traits<T, typename std::enable_if<has_align<T>::value, void>::type> { - info() : m_block(0) { } - size_t m_block; + static constexpr const std::size_t align_size = T::align_size; + static constexpr const std::size_t value_size = sizeof(typename T::value_type); + static constexpr const std::size_t stride_size = lcm(align_size, value_size) / value_size; }; - size_t m_min_alloc; - size_t m_min_align; + //============================================================ + // Aligned vector + //============================================================ - std::vector<block> m_blocks; + // FIXME: needs a separate file + template <class T, std::size_t ALIGN = alignof(T)> + class aligned_vector : public std::vector<T, aligned_allocator<T, ALIGN>> + { + public: + using base = std::vector<T, aligned_allocator<T, ALIGN>>; + + using reference = typename base::reference; + using const_reference = typename base::const_reference; + using pointer = typename base::pointer; + using const_pointer = typename base::const_pointer; + using size_type = typename base::size_type; -public: - mempool(size_t min_alloc, size_t min_align); - ~mempool(); + using base::base; - void *alloc(size_t size); - void free(void *ptr); + C14CONSTEXPR reference operator[](size_type i) noexcept + { + return assume_aligned_ptr<T, ALIGN>(&(base::operator[](0)))[i]; + } + constexpr const_reference operator[](size_type i) const noexcept + { + return assume_aligned_ptr<T, ALIGN>(&(base::operator[](0)))[i]; + } -}; + pointer data() noexcept { return assume_aligned_ptr<T, ALIGN>(base::data()); } + const_pointer data() const noexcept { return assume_aligned_ptr<T, ALIGN>(base::data()); } + + }; -} +} // namespace plib #endif /* PALLOC_H_ */ |