在MacOS X上检索系统信息？
无论如何，使用C ++可以获得有关计算机的基本信息？ 例如，有没有一种方法可以检查有多少内存正在被使用（整个计算机不只是我的电脑），可用的总内存，虚拟内存使用情况，CPU使用情况，网络状态等等？
我使用的是Mac OS X Snow Leopard，但我更喜欢可以在所有Mac OS上实现的解决方案（即Lion）
对于MacOS / X下的全系统内存使用信息，请打开并读取文件/ usr / bin / vm_stat，如下所示：
static double ParseMemValue(const char * b)
{
while((*b)&&(isdigit(*b) == false)) b++;
return isdigit(*b) ? atof(b) : -1.0;
}
// Returns a number between 0.0f and 1.0f, with 0.0f meaning all RAM is available, and 1.0f meaning all RAM is currently in use
float GetSystemMemoryUsagePercentage()
{
FILE * fpIn = popen("/usr/bin/vm_stat", "r");
if (fpIn)
{
double pagesUsed = 0.0, totalPages = 0.0;
char buf[512];
while(fgets(buf, sizeof(buf), fpIn) != NULL)
{
if (strncmp(buf, "Pages", 5) == 0)
{
double val = ParseMemValue(buf);
if (val >= 0.0)
{
if ((strncmp(buf, "Pages wired", 11) == 0)||(strncmp(buf, "Pages active", 12) == 0)) pagesUsed += val;
totalPages += val;
}
}
else if (strncmp(buf, "Mach Virtual Memory Statistics", 30) != 0) break; // Stop at "Translation Faults", we don't care about anything at or below that
}
pclose(fpIn);
if (totalPages > 0.0) return (float) (pagesUsed/totalPages);
}
return -1.0f; // indicate failure
}
对于CPU使用率指标，请执行如下操作：
#include <mach/mach_init.h>
#include <mach/mach_error.h>
#include <mach/mach_host.h>
#include <mach/vm_map.h>
static unsigned long long _previousTotalTicks = 0;
static unsigned long long _previousIdleTicks = 0;
// Returns 1.0f for "CPU fully pinned", 0.0f for "CPU idle", or somewhere in between
// You'll need to call this at regular intervals, since it measures the load between
// the previous call and the current one.
float GetCPULoad()
{
host_cpu_load_info_data_t cpuinfo;
mach_msg_type_number_t count = HOST_CPU_LOAD_INFO_COUNT;
if (host_statistics(mach_host_self(), HOST_CPU_LOAD_INFO, (host_info_t)&cpuinfo, &count) == KERN_SUCCESS)
{
unsigned long long totalTicks = 0;
for(int i=0; i<CPU_STATE_MAX; i++) totalTicks += cpuinfo.cpu_ticks[i];
return CalculateCPULoad(cpuinfo.cpu_ticks[CPU_STATE_IDLE], totalTicks);
}
else return -1.0f;
}
float CalculateCPULoad(unsigned long long idleTicks, unsigned long long totalTicks)
{
unsigned long long totalTicksSinceLastTime = totalTicks-_previousTotalTicks;
unsigned long long idleTicksSinceLastTime = idleTicks-_previousIdleTicks;
float ret = 1.0f-((totalTicksSinceLastTime > 0) ? ((float)idleTicksSinceLastTime)/totalTicksSinceLastTime : 0);
_previousTotalTicks = totalTicks;
_previousIdleTicks = idleTicks;
return ret;
}
对于网络统计，我不知道解决方案（除了可能运行netstat并以某种方式解析结果......它取决于您所感兴趣的网络统计信息）。
首先，如果您只专注于Mac OS，那么选择的语言应该是Objective - C.
你需要遵循的步骤