160 lines
3.9 KiB
C++
160 lines
3.9 KiB
C++
#ifndef memory_hh_INCLUDED
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#define memory_hh_INCLUDED
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#include <cstddef>
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#include <new>
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#include <utility>
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#include "assert.hh"
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#include "meta.hh"
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namespace Kakoune
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{
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enum class MemoryDomain
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{
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Undefined,
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String,
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SharedString,
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BufferContent,
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BufferMeta,
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Options,
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Highlight,
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Display,
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Mapping,
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Commands,
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Hooks,
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Aliases,
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EnvVars,
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Faces,
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Values,
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Registers,
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Client,
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WordDB,
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Selections,
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History,
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Remote,
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Events,
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Completion,
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Regex,
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Count
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};
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inline const char* domain_name(MemoryDomain domain)
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{
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switch (domain)
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{
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case MemoryDomain::Undefined: return "Undefined";
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case MemoryDomain::String: return "String";
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case MemoryDomain::SharedString: return "SharedString";
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case MemoryDomain::BufferContent: return "BufferContent";
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case MemoryDomain::BufferMeta: return "BufferMeta";
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case MemoryDomain::Options: return "Options";
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case MemoryDomain::Highlight: return "Highlight";
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case MemoryDomain::Display: return "Display";
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case MemoryDomain::Mapping: return "Mapping";
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case MemoryDomain::Commands: return "Commands";
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case MemoryDomain::Hooks: return "Hooks";
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case MemoryDomain::WordDB: return "WordDB";
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case MemoryDomain::Aliases: return "Aliases";
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case MemoryDomain::EnvVars: return "EnvVars";
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case MemoryDomain::Faces: return "Faces";
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case MemoryDomain::Values: return "Values";
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case MemoryDomain::Registers: return "Registers";
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case MemoryDomain::Client: return "Client";
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case MemoryDomain::Selections: return "Selections";
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case MemoryDomain::History: return "History";
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case MemoryDomain::Remote: return "Remote";
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case MemoryDomain::Events: return "Events";
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case MemoryDomain::Completion: return "Completion";
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case MemoryDomain::Regex: return "Regex";
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case MemoryDomain::Count: break;
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}
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kak_assert(false);
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return "";
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}
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extern size_t domain_allocated_bytes[(size_t)MemoryDomain::Count];
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inline void on_alloc(MemoryDomain domain, size_t size)
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{
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domain_allocated_bytes[(int)domain] += size;
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}
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inline void on_dealloc(MemoryDomain domain, size_t size)
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{
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kak_assert(domain_allocated_bytes[(int)domain] >= size);
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domain_allocated_bytes[(int)domain] -= size;
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}
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template<typename T, MemoryDomain domain>
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struct Allocator
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{
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using value_type = T;
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Allocator() = default;
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template<typename U>
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Allocator(const Allocator<U, domain>&) {}
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template<typename U>
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struct rebind { using other = Allocator<U, domain>; };
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T* allocate(size_t n)
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{
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size_t size = sizeof(T) * n;
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on_alloc(domain, size);
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return reinterpret_cast<T*>(::operator new(size));
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}
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void deallocate(T* ptr, size_t n)
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{
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size_t size = sizeof(T) * n;
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on_dealloc(domain, size);
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::operator delete(ptr);
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}
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};
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template<typename T1, MemoryDomain d1, typename T2, MemoryDomain d2>
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constexpr bool operator==(const Allocator<T1, d1>&, const Allocator<T2, d2>&)
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{
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return d1 == d2;
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}
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template<typename T1, MemoryDomain d1, typename T2, MemoryDomain d2>
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constexpr bool operator!=(const Allocator<T1, d1>&, const Allocator<T2, d2>&)
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{
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return d1 != d2;
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}
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constexpr MemoryDomain memory_domain(Meta::AnyType) { return MemoryDomain::Undefined; }
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template<typename T>
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constexpr decltype(T::Domain) memory_domain(Meta::Type<T>) { return T::Domain; }
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template<MemoryDomain d>
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struct UseMemoryDomain
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{
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static constexpr MemoryDomain Domain = d;
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static void* operator new(size_t size)
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{
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on_alloc(Domain, size);
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return ::operator new(size);
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}
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static void* operator new(size_t size, void* ptr)
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{
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return ::operator new(size, ptr);
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}
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static void operator delete(void* ptr, size_t size)
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{
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on_dealloc(Domain, size);
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::operator delete(ptr);
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}
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};
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}
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#endif // memory_hh_INCLUDED
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