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#pragma once
#include <cassert>
#include <iostream>
#include <windows.h>
#include <psapi.h>
#define DECL_MAIN int __cdecl wmain()
#define NOINLINE __declspec(noinline)
namespace pal {
static constexpr size_t kPageSize = 0x1000;
inline void* MemReserve(size_t len) {
void* buf = VirtualAlloc(nullptr, len, MEM_RESERVE, PAGE_NOACCESS);
if (buf == nullptr) {
DWORD last_error = GetLastError();
std::cerr << "Reserving memory with VirtualAlloc failed. Error code: " << last_error << std::endl;
return nullptr;
}
return buf;
}
inline bool MemCommit(void* p, size_t len) {
void* committed = VirtualAlloc(p, len, MEM_COMMIT, PAGE_READWRITE);
if (committed == nullptr) {
DWORD last_error = GetLastError();
std::cerr << "Committing memory with VirtualAlloc failed. Error code: " << last_error << std::endl;
return false;
}
return true;
}
inline void MemFree(void* p, size_t /*len*/) {
VirtualFree(p, 0, MEM_RELEASE);
}
inline size_t GetPeakMemoryUse() {
PROCESS_MEMORY_COUNTERS mem;
bool res = GetProcessMemoryInfo(GetCurrentProcess(), &mem, sizeof mem);
if (!res) {
DWORD last_error = GetLastError();
std::cerr << "GetProcessMemoryInfo failed. Error code: " << last_error << std::endl;
return 0;
}
return mem.PeakWorkingSetSize;
}
inline uint64_t ConvertFiletimeToMicroseconds(FILETIME t) {
ULARGE_INTEGER li;
li.LowPart = t.dwLowDateTime;
li.HighPart = t.dwHighDateTime;
return static_cast<uint64_t>(li.QuadPart) / 10;
}
inline uint64_t GetCpuTime() {
FILETIME a, b, c, d;
if (GetProcessTimes(GetCurrentProcess(), &a, &b, &c, &d) != 0) {
auto kernel_time = ConvertFiletimeToMicroseconds(c);
auto user_time = ConvertFiletimeToMicroseconds(d);
return user_time + kernel_time;
} else {
std::cerr << "failed to get CPU time\n";
assert(false);
return 0;
}
}
} // namespace pal
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