C++获取内存使用情况小结

void my_top(string path, bool flag)
{
    if(flag)
    {
        FILE* read_top = fopen("/proc/self/status", "r");
        char line_rss[128];
        unsigned long long Pid, VmSize, VmRSS;

        while (fgets(line_rss, 128, read_top) != NULL)
        {
            if (strncmp(line_rss, "Pid:", 4) == 0)
            {
                string str(line_rss + 4);
                Pid = strtoull(str.c_str(), NULL, 19);
            }

            if (strncmp(line_rss, "VmSize:", 7) == 0)
            {
                string str(line_rss + 7);
                VmSize = strtoull(str.c_str(), NULL, 19);
            }

            if (strncmp(line_rss, "VmRSS:", 6) == 0)
            {
                string str(line_rss + 6);
                VmRSS = strtoull(str.c_str(), NULL, 19);
            }

            if(Pid < 0 || VmSize < 0 || VmRSS < 0)
            {
                fclose(read_top);
                break;
            }
        }
        fclose(read_top);

        ofstream writer_top(path, ios::app);
        writer_top << Pid << " " << VmSize << " " << VmRSS << endl;
        writer_top.close();
    }
    else
    {
        ofstream writer_top(path, ios::app);
        writer_top << "0" << " " << "0" << " " << "0" << endl;
        writer_top.close();
    }
}

#include <windows.h>
#include <psapi.h>
#include <stdio.h>

int main()
{
    PROCESS_MEMORY_COUNTERS pmc;
    if (GetProcessMemoryInfo(GetCurrentProcess(), &pmc, sizeof(pmc)))
    {
        printf("当前进程占用内存大小为：%d KB\n", pmc.WorkingSetSize / 1024);
    }
    return 0;
}