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/*
* Memory Locking Functions
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/util.h>
#if defined(BOTAN_TARGET_OS_HAS_POSIX_MLOCK)
#include <sys/types.h>
#include <sys/mman.h>
#elif defined(BOTAN_TARGET_OS_HAS_WIN32_VIRTUAL_LOCK)
#include <windows.h>
#endif
namespace Botan {
/*
* Lock an area of memory into RAM
*/
#if defined(BOTAN_TARGET_OS_HAS_POSIX_MLOCK) \
|| defined(BOTAN_TARGET_OS_HAS_WIN32_VIRTUAL_LOCK)
bool lock_mem(void* ptr, u32bit bytes)
#else
bool lock_mem(void*, u32bit)
#endif
{
#if defined(BOTAN_TARGET_OS_HAS_POSIX_MLOCK)
return (mlock(ptr, bytes) == 0);
#elif defined(BOTAN_TARGET_OS_HAS_WIN32_VIRTUAL_LOCK)
return (VirtualLock(ptr, bytes) != 0);
#else
return false;
#endif
}
/*
* Unlock a previously locked region of memory
*/
#if defined(BOTAN_TARGET_OS_HAS_POSIX_MLOCK) \
|| defined(BOTAN_TARGET_OS_HAS_WIN32_VIRTUAL_LOCK)
void unlock_mem(void* ptr, u32bit bytes)
#else
void unlock_mem(void*, u32bit)
#endif
{
#if defined(BOTAN_TARGET_OS_HAS_POSIX_MLOCK)
munlock(ptr, bytes);
#elif defined(BOTAN_TARGET_OS_HAS_WIN32_VIRTUAL_LOCK)
VirtualUnlock(ptr, bytes);
#endif
}
}
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