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#pragma once
#include "defaults.h"
#include <util/generic/flags.h>
//on some systems (not win, freebd, linux, but darwin (Mac OS X)
//multiple mlock calls on the same address range
//require the corresponding number of munlock calls to actually unlock the pages
//on some systems you must have privilege and resource limit
void LockMemory(const void* addr, size_t len);
void UnlockMemory(const void* addr, size_t len);
enum ELockAllMemoryFlag {
/** Lock all pages which are currently mapped into the address space of the process. */
LockCurrentMemory = 1,
/** Lock all pages which will become mapped into the address space of the process in the future. */
LockFutureMemory = 2,
/** Since Linux 4.4, with LockCurrentMemory or LockFutureMemory or both, lock only pages that are or once they are present in memory. */
LockMemoryOnFault = 4,
};
Y_DECLARE_FLAGS(ELockAllMemoryFlags, ELockAllMemoryFlag);
Y_DECLARE_OPERATORS_FOR_FLAGS(ELockAllMemoryFlags);
/**
* Performs provided locking operation.
*
* Does nothing on windows.
*
* \param flags Locking operation to perform.
*/
void LockAllMemory(ELockAllMemoryFlags flags);
/**
* Unlocks whatever was locked with a previous call to `LockAllMemory`.
*
* Does nothing on windows.
*/
void UnlockAllMemory();
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