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#include <util/generic/yexception.h>
#include "align.h"
#include "error.h"
#include "info.h"
#include "mlock.h"
#if defined(_unix_)
#include <sys/mman.h>
#if !defined(MCL_ONFAULT) && defined(MCL_FUTURE) // Old glibc.
#define MCL_ONFAULT (MCL_FUTURE << 1)
#endif
#if defined(_android_)
#include <sys/syscall.h>
#define munlockall() syscall(__NR_munlockall)
#endif
#else
#include "winint.h"
#endif
#include <limits>
void LockMemory(const void* addr, size_t len) {
#if defined(_unix_)
if (0 == len) {
return;
}
Y_ASSERT(static_cast<ssize_t>(len) > 0);
const size_t pageSize = NSystemInfo::GetPageSize();
const char* begin = AlignDown(static_cast<const char*>(addr), pageSize);
const char* end = AlignUp(static_cast<const char*>(addr) + len, pageSize);
if (mlock(begin, end - begin)) {
ythrow yexception() << LastSystemErrorText();
}
#elif defined(_win_)
HANDLE hndl = GetCurrentProcess();
SIZE_T min, max;
if (!GetProcessWorkingSetSize(hndl, &min, &max))
ythrow yexception() << LastSystemErrorText();
if (!SetProcessWorkingSetSize(hndl, min + len, max + len))
ythrow yexception() << LastSystemErrorText();
if (!VirtualLock((LPVOID)addr, len))
ythrow yexception() << LastSystemErrorText();
#endif
}
void UnlockMemory(const void* addr, size_t len) {
#if defined(_unix_)
if (0 == len) {
return;
}
Y_ASSERT(static_cast<ssize_t>(len) > 0);
const size_t pageSize = NSystemInfo::GetPageSize();
const char* begin = AlignDown(static_cast<const char*>(addr), pageSize);
const char* end = AlignUp(static_cast<const char*>(addr) + len, pageSize);
if (munlock(begin, end - begin)) {
ythrow yexception() << LastSystemErrorText();
}
#elif defined(_win_)
HANDLE hndl = GetCurrentProcess();
SIZE_T min, max;
if (!GetProcessWorkingSetSize(hndl, &min, &max))
ythrow yexception() << LastSystemErrorText();
if (!SetProcessWorkingSetSize(hndl, min - len, max - len))
ythrow yexception() << LastSystemErrorText();
if (!VirtualUnlock((LPVOID)addr, len))
ythrow yexception() << LastSystemErrorText();
#endif
}
void LockAllMemory(ELockAllMemoryFlags flags) {
Y_UNUSED(flags);
#if defined(_android_)
// unimplemented
#elif defined(_cygwin_)
// unimplemented
#elif defined(_unix_)
int sys_flags = 0;
if (flags & LockCurrentMemory) {
sys_flags |= MCL_CURRENT;
}
if (flags & LockFutureMemory) {
sys_flags |= MCL_FUTURE;
}
if (flags & LockMemoryOnFault) {
sys_flags |= MCL_ONFAULT;
}
if (mlockall(sys_flags)) {
ythrow yexception() << LastSystemErrorText();
}
#endif
}
void UnlockAllMemory() {
#if defined(_cygwin_)
// unimplemented
#elif defined(_unix_)
if (munlockall()) {
ythrow yexception() << LastSystemErrorText();
}
#endif
}
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