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meminfo.h
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meminfo.h
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#if !defined(spp_memory_h_guard)
#define spp_memory_h_guard
#include <cstdint>
#include <cstring>
#include <cstdlib>
#if defined(_WIN32) || defined( __CYGWIN__)
#define SPP_WIN
#endif
#ifdef SPP_WIN
#include <windows.h>
#include <Psapi.h>
#undef min
#undef max
#elif defined(__linux__)
#include <sys/types.h>
#include <sys/sysinfo.h>
#elif defined(__FreeBSD__)
#include <paths.h>
#include <fcntl.h>
#include <kvm.h>
#include <unistd.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#endif
namespace spp
{
uint64_t GetSystemMemory();
uint64_t GetTotalMemoryUsed();
uint64_t GetProcessMemoryUsed();
uint64_t GetPhysicalMemory();
uint64_t GetSystemMemory()
{
#ifdef SPP_WIN
MEMORYSTATUSEX memInfo;
memInfo.dwLength = sizeof(MEMORYSTATUSEX);
GlobalMemoryStatusEx(&memInfo);
return static_cast<uint64_t>(memInfo.ullTotalPageFile);
#elif defined(__linux__)
struct sysinfo memInfo;
sysinfo (&memInfo);
auto totalVirtualMem = memInfo.totalram;
totalVirtualMem += memInfo.totalswap;
totalVirtualMem *= memInfo.mem_unit;
return static_cast<uint64_t>(totalVirtualMem);
#elif defined(__FreeBSD__)
kvm_t *kd;
u_int pageCnt;
size_t pageCntLen = sizeof(pageCnt);
u_int pageSize;
struct kvm_swap kswap;
uint64_t totalVirtualMem;
pageSize = static_cast<u_int>(getpagesize());
sysctlbyname("vm.stats.vm.v_page_count", &pageCnt, &pageCntLen, NULL, 0);
totalVirtualMem = pageCnt * pageSize;
kd = kvm_open(NULL, _PATH_DEVNULL, NULL, O_RDONLY, "kvm_open");
kvm_getswapinfo(kd, &kswap, 1, 0);
kvm_close(kd);
totalVirtualMem += kswap.ksw_total * pageSize;
return totalVirtualMem;
#else
return 0;
#endif
}
uint64_t GetTotalMemoryUsed()
{
#ifdef SPP_WIN
MEMORYSTATUSEX memInfo;
memInfo.dwLength = sizeof(MEMORYSTATUSEX);
GlobalMemoryStatusEx(&memInfo);
return static_cast<uint64_t>(memInfo.ullTotalPageFile - memInfo.ullAvailPageFile);
#elif defined(__linux__)
struct sysinfo memInfo;
sysinfo(&memInfo);
auto virtualMemUsed = memInfo.totalram - memInfo.freeram;
virtualMemUsed += memInfo.totalswap - memInfo.freeswap;
virtualMemUsed *= memInfo.mem_unit;
return static_cast<uint64_t>(virtualMemUsed);
#elif defined(__FreeBSD__)
kvm_t *kd;
u_int pageSize;
u_int pageCnt, freeCnt;
size_t pageCntLen = sizeof(pageCnt);
size_t freeCntLen = sizeof(freeCnt);
struct kvm_swap kswap;
uint64_t virtualMemUsed;
pageSize = static_cast<u_int>(getpagesize());
sysctlbyname("vm.stats.vm.v_page_count", &pageCnt, &pageCntLen, NULL, 0);
sysctlbyname("vm.stats.vm.v_free_count", &freeCnt, &freeCntLen, NULL, 0);
virtualMemUsed = (pageCnt - freeCnt) * pageSize;
kd = kvm_open(NULL, _PATH_DEVNULL, NULL, O_RDONLY, "kvm_open");
kvm_getswapinfo(kd, &kswap, 1, 0);
kvm_close(kd);
virtualMemUsed += kswap.ksw_used * pageSize;
return virtualMemUsed;
#else
return 0;
#endif
}
uint64_t GetProcessMemoryUsed()
{
#ifdef SPP_WIN
PROCESS_MEMORY_COUNTERS_EX pmc;
GetProcessMemoryInfo(GetCurrentProcess(), reinterpret_cast<PPROCESS_MEMORY_COUNTERS>(&pmc), sizeof(pmc));
return static_cast<uint64_t>(pmc.PrivateUsage);
#elif defined(__linux__)
auto parseLine =
[](char* line)->int
{
auto i = strlen(line);
while(*line < '0' || *line > '9')
{
line++;
}
line[i-3] = '\0';
i = atoi(line);
return i;
};
auto file = fopen("/proc/self/status", "r");
auto result = -1;
char line[128];
while(fgets(line, 128, file) != nullptr)
{
if(strncmp(line, "VmSize:", 7) == 0)
{
result = parseLine(line);
break;
}
}
fclose(file);
return static_cast<uint64_t>(result) * 1024;
#elif defined(__FreeBSD__)
struct kinfo_proc info;
size_t infoLen = sizeof(info);
int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid() };
sysctl(mib, sizeof(mib) / sizeof(*mib), &info, &infoLen, NULL, 0);
return static_cast<uint64_t>(info.ki_rssize * getpagesize());
#else
return 0;
#endif
}
uint64_t GetPhysicalMemory()
{
#ifdef SPP_WIN
MEMORYSTATUSEX memInfo;
memInfo.dwLength = sizeof(MEMORYSTATUSEX);
GlobalMemoryStatusEx(&memInfo);
return static_cast<uint64_t>(memInfo.ullTotalPhys);
#elif defined(__linux__)
struct sysinfo memInfo;
sysinfo(&memInfo);
auto totalPhysMem = memInfo.totalram;
totalPhysMem *= memInfo.mem_unit;
return static_cast<uint64_t>(totalPhysMem);
#elif defined(__FreeBSD__)
u_long physMem;
size_t physMemLen = sizeof(physMem);
int mib[] = { CTL_HW, HW_PHYSMEM };
sysctl(mib, sizeof(mib) / sizeof(*mib), &physMem, &physMemLen, NULL, 0);
return physMem;
#else
return 0;
#endif
}
}
#endif // spp_memory_h_guard

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meminfo.h (5 KB)

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