使用Linux和Mac代码，Memory Info平*立类完成这3种方法

Take the look at this working class.

看看这个工人阶级吧。

I created this class for my project in Qt, because Qt doesn't have its own methods to get information about memory like: Current process memory, Free Memory or Total Memory.

我在Qt中为我的项目创建了这个类,因为Qt没有自己的方法来获取有关内存的信息,如:当前进程内存,可用内存或总内存。

The class is adapted to Qt, but can be easily adapted to pure C or other api Its need to link "psapi.lib" or -lpsapi

该类适用于Qt,但可以很容易地适应纯C或其他api它需要链接“psapi.lib”或-lpsapi

The problem is I need to complete this class with Linux and Mac code, I think there is many experienced programmers that can fullfill it with correctly and working code...

问题是我需要用Linux和Mac代码完成这个类,我认为有很多有经验的程序员可以用正确的代码填充它...

the header *.h file

标题* .h文件

#ifndef __CLASS__MEMORYINFO__
#define __CLASS__MEMORYINFO__

#include <QtCore>

#ifdef WIN32
    #include <Windows.h>
#endif

class class_MemoryInfo
{
     public:
            class_MemoryInfo( void );

            qlonglong GetFreeMemory( void );
            qlonglong GetTotalMemory( void );
            qlonglong GetCurrentProcesMemory( void );
};

#endif

and the *.cpp file

和* .cpp文件

#include "class_MemoryInfo.h"

#ifdef WIN32
    #include <Psapi.h>
#endif

class_MemoryInfo::class_MemoryInfo()
{
}

qlonglong class_MemoryInfo::GetFreeMemory( void )
{
    qlonglong _value = 0;

    #ifdef WIN32
        MEMORYSTATUSEX MemoryStatus;
        ZeroMemory( &MemoryStatus, sizeof( MEMORYSTATUSEX ) );
        MemoryStatus.dwLength = sizeof( MEMORYSTATUSEX );

        if ( GlobalMemoryStatusEx( &MemoryStatus) )
        {
            _value = MemoryStatus.ullAvailPhys;
        }
        else
            _value = 0;
    #endif

    return _value;
}

qlonglong class_MemoryInfo::GetTotalMemory( void )
{
    qlonglong _value = 0;

    #ifdef WIN32
        MEMORYSTATUSEX MemoryStatus;
        ZeroMemory( &MemoryStatus, sizeof(MEMORYSTATUSEX ));
        MemoryStatus.dwLength = sizeof( MEMORYSTATUSEX );

        if ( GlobalMemoryStatusEx( &MemoryStatus) )
        {
            _value = MemoryStatus.ullTotalPhys;
        }
        else
            _value = 0;
    #endif

    return _value;
}

qlonglong class_MemoryInfo::GetCurrentProcesMemory( void )
{
    qlonglong _value = 0;

    #ifdef WIN32
       PROCESS_MEMORY_COUNTERS pmc;
       if ( GetProcessMemoryInfo( GetCurrentProcess(), &pmc, sizeof(pmc)) )
           _value = pmc.WorkingSetSize;
       else
           _value = 0;
    #endif

    return _value;
}

1 个解决方案

#1

Well, I won't completely write the drop-in equivalent for you, but here is a basic outline of at least the total memory. This should also work for free memory, but I think you may have to look elsewhere for process memory.

好吧,我不会完全为你写下插件,但这里至少是总内存的基本轮廓。这也适用于空闲内存,但我认为您可能需要寻找其他地方的进程内存。

Mac

Use sysctl; man sysctl to see all the options.

使用sysctl; man sysctl可以看到所有选项。

QProcess p;
p.start("sysctl", QStringList() << "hw.physmem");
p.waitForFinished();
QString system_info = p.readAllStandardOutput();
p.close();

Linux

Read /proc/meminfo. Open that file to see all the options.

读/ proc / meminfo。打开该文件以查看所有选项。

// The actual command is "awk '/MemTotal/ { print $2 }' /proc/meminfo", but
// QProcess has trouble with the single quotes. Putting it as a separate
// argument (without the quotes) seems to work.
p.start("awk", QStringList() << "/MemTotal/ { print $2 }" << "/proc/meminfo");
p.waitForFinished();
QString memory = p.readAllStandardOutput();
p.close();

#1