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112 lines
3.5 KiB
C++
112 lines
3.5 KiB
C++
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#if defined(_WIN32)
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#include <windows.h>
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#elif defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
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#include <sys/param.h>
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#include <sys/types.h>
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#include <unistd.h>
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#if defined(BSD)
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#include <sys/sysctl.h>
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#endif
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#else
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#error "Unable to define getMemorySize( ) for an unknown OS."
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#endif
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#include <cpuid.h>
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#include <iostream>
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#include <stdint.h>
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static void cpuid(uint32_t func, uint32_t sub, uint32_t data[4]) {
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__cpuid_count(func, sub, data[0], data[1], data[2], data[3]);
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}
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/**
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* Returns the size of physical memory (RAM) in bytes.
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*/
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size_t getMemorySize() {
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#if defined(_WIN32) && (defined(__CYGWIN__) || defined(__CYGWIN32__))
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/* Cygwin under Windows. ------------------------------------ */
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/* New 64-bit MEMORYSTATUSEX isn't available. Use old 32.bit */
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MEMORYSTATUS status;
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status.dwLength = sizeof(status);
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GlobalMemoryStatus(&status);
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return (size_t)status.dwTotalPhys;
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#elif defined(_WIN32)
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/* Windows. ------------------------------------------------- */
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/* Use new 64-bit MEMORYSTATUSEX, not old 32-bit MEMORYSTATUS */
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MEMORYSTATUSEX status;
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status.dwLength = sizeof(status);
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GlobalMemoryStatusEx(&status);
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return (size_t)status.ullTotalPhys;
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#elif defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
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/* UNIX variants. ------------------------------------------- */
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/* Prefer sysctl() over sysconf() except sysctl() HW_REALMEM and HW_PHYSMEM */
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#if defined(CTL_HW) && (defined(HW_MEMSIZE) || defined(HW_PHYSMEM64))
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int mib[2];
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mib[0] = CTL_HW;
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#if defined(HW_MEMSIZE)
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mib[1] = HW_MEMSIZE; /* OSX. --------------------- */
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#elif defined(HW_PHYSMEM64)
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mib[1] = HW_PHYSMEM64; /* NetBSD, OpenBSD. --------- */
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#endif
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int64_t size = 0; /* 64-bit */
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size_t len = sizeof(size);
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if (sysctl(mib, 2, &size, &len, NULL, 0) == 0)
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return (size_t)size;
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return 0L; /* Failed? */
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#elif defined(_SC_AIX_REALMEM)
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/* AIX. ----------------------------------------------------- */
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return (size_t)sysconf(_SC_AIX_REALMEM) * (size_t)1024L;
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#elif defined(_SC_PHYS_PAGES) && defined(_SC_PAGESIZE)
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/* FreeBSD, Linux, OpenBSD, and Solaris. -------------------- */
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return (size_t)sysconf(_SC_PHYS_PAGES) * (size_t)sysconf(_SC_PAGESIZE);
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#elif defined(_SC_PHYS_PAGES) && defined(_SC_PAGE_SIZE)
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/* Legacy. -------------------------------------------------- */
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return (size_t)sysconf(_SC_PHYS_PAGES) * (size_t)sysconf(_SC_PAGE_SIZE);
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#elif defined(CTL_HW) && (defined(HW_PHYSMEM) || defined(HW_REALMEM))
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/* DragonFly BSD, FreeBSD, NetBSD, OpenBSD, and OSX. -------- */
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int mib[2];
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mib[0] = CTL_HW;
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#if defined(HW_REALMEM)
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mib[1] = HW_REALMEM; /* FreeBSD. ----------------- */
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#elif defined(HW_PYSMEM)
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mib[1] = HW_PHYSMEM; /* Others. ------------------ */
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#endif
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unsigned int size = 0; /* 32-bit */
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size_t len = sizeof(size);
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if (sysctl(mib, 2, &size, &len, NULL, 0) == 0)
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return (size_t)size;
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return 0L; /* Failed? */
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#endif /* sysctl and sysconf variants */
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#else
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return 0L; /* Unknown OS. */
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#endif
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}
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int main() {
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uint32_t data[4];
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char str[48];
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for (int i = 0; i < 3; ++i) {
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cpuid(0x80000002 + i, 0, data);
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for (int j = 0; j < 4; ++j)
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reinterpret_cast<uint32_t*>(str)[i * 4 + j] = data[j];
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}
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size_t memorySize = getMemorySize();
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std::cout << "CPU: " << str << std::endl;
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std::cout << "Memory: " << (memorySize / 1024 / 1024) << "MB" << std::endl;
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return 0;
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}
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