sidecoin/src/allocators.cpp at master · superstacked/sidecoin · GitHub

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// Distributed under the MIT/X11 software license, see the accompanying

// file COPYING or http://www.opensource.org/licenses/mit-license.php.

#include "allocators.h"

#ifdef WIN32

#ifdef _WIN32_WINNT

#undef _WIN32_WINNT

#endif

#define _WIN32_WINNT 0x0501

#define WIN32_LEAN_AND_MEAN 1

#ifndef NOMINMAX

#define NOMINMAX

#endif

#include <windows.h>

// This is used to attempt to keep keying material out of swap

// Note that VirtualLock does not provide this as a guarantee on Windows,

// but, in practice, memory that has been VirtualLock'd almost never gets written to

// the pagefile except in rare circumstances where memory is extremely low.

#else

#include <sys/mman.h>

#include <limits.h> // for PAGESIZE

#include <unistd.h> // for sysconf

#endif

LockedPageManager* LockedPageManager::_instance = NULL;

boost::once_flag LockedPageManager::init_flag = BOOST_ONCE_INIT;

/** Determine system page size in bytes */

static inline size_t GetSystemPageSize()

{

size_t page_size;

#if defined(WIN32)

SYSTEM_INFO sSysInfo;

GetSystemInfo(&sSysInfo);

page_size = sSysInfo.dwPageSize;

#elif defined(PAGESIZE) // defined in limits.h

page_size = PAGESIZE;

#else // assume some POSIX OS

page_size = sysconf(_SC_PAGESIZE);

#endif

return page_size;

}

bool MemoryPageLocker::Lock(const void *addr, size_t len)

{

#ifdef WIN32

return VirtualLock(const_cast<void*>(addr), len);

#else

return mlock(addr, len) == 0;

#endif

}

bool MemoryPageLocker::Unlock(const void *addr, size_t len)

{

#ifdef WIN32

return VirtualUnlock(const_cast<void*>(addr), len);

#else

return munlock(addr, len) == 0;

#endif

}

LockedPageManager::LockedPageManager() : LockedPageManagerBase<MemoryPageLocker>(GetSystemPageSize())

{

}

sidecoin/src/allocators.cpp at master · superstacked/sidecoin · GitHub

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