不使用外部工具获取总系统内存

这里也可以看到:

http://www.cocoadev.com/index.pl?HowToGetHardwareAndNetworkInfo

系统控制

你可以使用 sysctl (更多细节) here )

本节中使用的符号为 在文件sysctl.h.中声明 功能:

int sysctl (int *names, int nlen, void *oldval, size_t *oldlenp, void *newval, size_t newlen)

地质学

getrusage

#include <sys/resource.h> 

int getrusage(int who, struct rusage *usage); 

struct rusage {
    struct timeval ru_utime; /* user time used */
    struct timeval ru_stime; /* system time used */
    long   ru_maxrss;        /* maximum resident set size */
    long   ru_ixrss;         /* integral shared memory size */
    long   ru_idrss;         /* integral unshared data size */
    long   ru_isrss;         /* integral unshared stack size */
    long   ru_minflt;        /* page reclaims */
    long   ru_majflt;        /* page faults */
    long   ru_nswap;         /* swaps */
    long   ru_inblock;       /* block input operations */
    long   ru_oublock;       /* block output operations */
    long   ru_msgsnd;        /* messages sent */
    long   ru_msgrcv;        /* messages received */
    long   ru_nsignals;      /* signals received */
    long   ru_nvcsw;         /* voluntary context switches */
    long   ru_nivcsw;        /* involuntary context switches */
};

您可以使用API GetRusage

     int who = RUSAGE_SELF;
    struct rusage usage={0,};
    int ret=0;
    ret = getrusage(who, &usage);

查找的结构 rusage 选择你关心的价值观。