mirror of
https://github.com/EQEmu/Server.git
synced 2026-04-06 16:22:25 +00:00
75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
/* EQEmu: EQEmulator
|
|
|
|
Copyright (C) 2001-2026 EQEmu Development Team
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#pragma once
|
|
|
|
#include "common/eqemu_logsys.h"
|
|
|
|
class PageAlignedAllocatorBase
|
|
{
|
|
protected:
|
|
void* allocateInternal(size_t amount, size_t alignment);
|
|
size_t getPageSize() const;
|
|
};
|
|
|
|
// Page-aligned allocator for std::vector
|
|
template <typename T>
|
|
class PageAlignedAllocator : public PageAlignedAllocatorBase
|
|
{
|
|
public:
|
|
using value_type = T;
|
|
|
|
PageAlignedAllocator() noexcept = default;
|
|
|
|
template <typename U>
|
|
PageAlignedAllocator(const PageAlignedAllocator<U>&) noexcept {}
|
|
|
|
T* allocate(std::size_t n)
|
|
{
|
|
size_t size = n * sizeof(T);
|
|
|
|
return static_cast<T*>(allocateInternal(size, getPageSize()));
|
|
}
|
|
|
|
void deallocate(T* p, std::size_t) noexcept
|
|
{
|
|
free(p);
|
|
}
|
|
};
|
|
|
|
template <typename T, typename U>
|
|
bool operator==(const PageAlignedAllocator<T>&, const PageAlignedAllocator<U>&) noexcept {
|
|
return true;
|
|
}
|
|
|
|
template <typename T, typename U>
|
|
bool operator!=(const PageAlignedAllocator<T>&, const PageAlignedAllocator<U>&) noexcept {
|
|
return false;
|
|
}
|
|
|
|
// Kernel Samepage Merging (KSM) functionality
|
|
namespace KSM {
|
|
|
|
void CheckPageAlignment(void* ptr);
|
|
void* AllocatePageAligned(size_t size);
|
|
void MarkMemoryForKSM(void* start, size_t size);
|
|
void AlignHeapToPageBoundary();
|
|
void* MarkHeapStart();
|
|
size_t MeasureHeapUsage(void* start);
|
|
|
|
} // namespace KSM
|