SystemMemory.h File Reference

Go to the source code of this file.

Functions
size_t	getPeakRSS ()
	Returns the peak (maximum so far) resident set size (physical memory use) measured in bytes, or zero if the value cannot be determined on this OS. More...
size_t	getCurrentRSS ()
	Returns the current resident set size (physical memory use) measured in bytes, or zero if the value cannot be determined on this OS. More...

Function Documentation

getCurrentRSS()

size_t getCurrentRSS

(

)

Returns the current resident set size (physical memory use) measured in bytes, or zero if the value cannot be determined on this OS.

Definition at line 82 of file SystemMemory.h.

                       {
#if defined(_WIN32)
    /* Windows -------------------------------------------------- */
    PROCESS_MEMORY_COUNTERS info;
    GetProcessMemoryInfo(GetCurrentProcess(), &info, sizeof(info));
    return (size_t)info.WorkingSetSize;
 
#elif defined(__APPLE__) && defined(__MACH__)
    /* OSX ------------------------------------------------------ */
    struct mach_task_basic_info info;
    mach_msg_type_number_t infoCount = MACH_TASK_BASIC_INFO_COUNT;
    if (task_info(mach_task_self(), MACH_TASK_BASIC_INFO, (task_info_t)&info, &infoCount) != KERN_SUCCESS)
        return (size_t)0L; /* Can't access? */
    return (size_t)info.resident_size;
 
#elif defined(__linux__) || defined(__linux) || defined(linux) || defined(__gnu_linux__)
    /* Linux ---------------------------------------------------- */
    long rss = 0L;
    FILE * fp = NULL;
    if ((fp = fopen("/proc/self/statm", "r")) == NULL)
        return (size_t)0L; /* Can't open? */
    if (fscanf(fp, "%*s%ld", &rss) != 1) {
        fclose(fp);
        return (size_t)0L; /* Can't read? */
    }
    fclose(fp);
    return (size_t)rss * (size_t)sysconf(_SC_PAGESIZE);
 
#else
    /* AIX, BSD, Solaris, and Unknown OS ------------------------ */
    return (size_t)0L; /* Unsupported. */
#endif
}

getPeakRSS()

size_t getPeakRSS

(

)

Returns the peak (maximum so far) resident set size (physical memory use) measured in bytes, or zero if the value cannot be determined on this OS.

Definition at line 41 of file SystemMemory.h.

                    {
#if defined(_WIN32)
    /* Windows -------------------------------------------------- */
    PROCESS_MEMORY_COUNTERS info;
    GetProcessMemoryInfo(GetCurrentProcess(), &info, sizeof(info));
    return (size_t)info.PeakWorkingSetSize;
 
#elif (defined(_AIX) || defined(__TOS__AIX__)) ||                                                                      \
    (defined(__sun__) || defined(__sun) || defined(sun) && (defined(__SVR4) || defined(__svr4__)))
    /* AIX and Solaris ------------------------------------------ */
    struct psinfo psinfo;
    int fd = -1;
    if ((fd = open("/proc/self/psinfo", O_RDONLY)) == -1)
        return (size_t)0L; /* Can't open? */
    if (read(fd, &psinfo, sizeof(psinfo)) != sizeof(psinfo)) {
        close(fd);
        return (size_t)0L; /* Can't read? */
    }
    close(fd);
    return (size_t)(psinfo.pr_rssize * 1024L);
 
#elif defined(__unix__) || defined(__unix) || defined(unix) || (defined(__APPLE__) && defined(__MACH__))
    /* BSD, Linux, and OSX -------------------------------------- */
    struct rusage rusage;
    getrusage(RUSAGE_SELF, &rusage);
#if defined(__APPLE__) && defined(__MACH__)
    return (size_t)rusage.ru_maxrss;
#else
    return (size_t)(rusage.ru_maxrss * 1024L);
#endif
 
#else
    /* Unknown OS ----------------------------------------------- */
    return (size_t)0L; /* Unsupported. */
#endif
}