uptime_proc.c 文件参考

浏览源代码.

函数
static int	UptimeProcFill (struct SeqBuf *seqBuf, void *v)
void	ProcUptimeInit (void)

变量
static const struct ProcFileOperations	UPTIME_PROC_FOPS
	替换了 read 接口的实现 更多...

函数说明

ProcUptimeInit()

void ProcUptimeInit

(

void

)

在文件 uptime_proc.c 第 77 行定义.

{
    struct ProcDirEntry *pde = CreateProcEntry("uptime", 0, NULL);
    if (pde == NULL) {
        PRINT_ERR("creat /proc/uptime error!\n");
        return;
    }
 
    pde->procFileOps = &UPTIME_PROC_FOPS;
}

函数调用图:

这是这个函数的调用关系图:

UptimeProcFill()

static int UptimeProcFill ( struct SeqBuf *  seqBuf, void *  v  )

static

在文件 uptime_proc.c 第 41 行定义.

{
    struct timespec curtime = {0, 0};
    int ret;
#ifdef LOSCFG_KERNEL_CPUP
    float idleRate;
    float idleMSec;
    float usage;
#endif
    ret = clock_gettime(CLOCK_MONOTONIC, &curtime);
    if (ret < 0) {
        PRINT_ERR("clock_gettime error!\n");
        return -get_errno();
    }
 
#ifdef LOSCFG_KERNEL_CPUP
    usage = (float)LOS_HistorySysCpuUsage(CPUP_ALL_TIME);
    idleRate = LOSCFG_KERNEL_CORE_NUM - usage / LOS_CPUP_PRECISION_MULT / DECIMAL_TO_PERCENT;
    idleMSec = ((float)curtime.tv_sec * SEC_TO_MSEC + curtime.tv_nsec / MSEC_TO_NSEC) * idleRate;
 
    (void)LosBufPrintf(seqBuf, "%llu.%03llu %llu.%03llu\n", (unsigned long long)curtime.tv_sec,
                       (unsigned long long)(curtime.tv_nsec / MSEC_TO_NSEC),
                       (unsigned long long)(idleMSec / SEC_TO_MSEC),
                       (unsigned long long)((unsigned long long)idleMSec % SEC_TO_MSEC));
#else
    (void)LosBufPrintf(seqBuf, "%llu.%03llu\n", (unsigned long long)curtime.tv_sec,
                       (unsigned long long)(curtime.tv_nsec / MSEC_TO_NSEC));
 
#endif
    return 0;
}

函数调用图:

变量说明

UPTIME_PROC_FOPS

const struct ProcFileOperations UPTIME_PROC_FOPS

static

初始值:

= {
    .read       = UptimeProcFill,
}

替换了 read 接口的实现

在文件 uptime_proc.c 第 73 行定义.