func CgroupMemWithContext()

in patches/gopsutil/v3/docker/docker_linux.go [173:267]
91 lines of code
36 McCabe index (conditional complexity)

func CgroupMemWithContext(ctx context.Context, containerID string, base string) (*CgroupMemStat, error) {
	statfile := getCgroupFilePath(containerID, base, "memory", "memory.stat")

	// empty containerID means all cgroup
	if len(containerID) == 0 {
		containerID = "all"
	}
	lines, err := common.ReadLines(statfile)
	if err != nil {
		return nil, err
	}
	ret := &CgroupMemStat{ContainerID: containerID}
	for _, line := range lines {
		fields := strings.Split(line, " ")
		v, err := strconv.ParseUint(fields[1], 10, 64)
		if err != nil {
			continue
		}
		switch fields[0] {
		case "cache":
			ret.Cache = v
		case "rss":
			ret.RSS = v
		case "rssHuge":
			ret.RSSHuge = v
		case "mappedFile":
			ret.MappedFile = v
		case "pgpgin":
			ret.Pgpgin = v
		case "pgpgout":
			ret.Pgpgout = v
		case "pgfault":
			ret.Pgfault = v
		case "pgmajfault":
			ret.Pgmajfault = v
		case "inactiveAnon", "inactive_anon":
			ret.InactiveAnon = v
		case "activeAnon", "active_anon":
			ret.ActiveAnon = v
		case "inactiveFile", "inactive_file":
			ret.InactiveFile = v
		case "activeFile", "active_file":
			ret.ActiveFile = v
		case "unevictable":
			ret.Unevictable = v
		case "hierarchicalMemoryLimit", "hierarchical_memory_limit":
			ret.HierarchicalMemoryLimit = v
		case "totalCache", "total_cache":
			ret.TotalCache = v
		case "totalRss", "total_rss":
			ret.TotalRSS = v
		case "totalRssHuge", "total_rss_huge":
			ret.TotalRSSHuge = v
		case "totalMappedFile", "total_mapped_file":
			ret.TotalMappedFile = v
		case "totalPgpgin", "total_pgpgin":
			ret.TotalPgpgIn = v
		case "totalPgpgout", "total_pgpgout":
			ret.TotalPgpgOut = v
		case "totalPgfault", "total_pgfault":
			ret.TotalPgFault = v
		case "totalPgmajfault", "total_pgmajfault":
			ret.TotalPgMajFault = v
		case "totalInactiveAnon", "total_inactive_anon":
			ret.TotalInactiveAnon = v
		case "totalActiveAnon", "total_active_anon":
			ret.TotalActiveAnon = v
		case "totalInactiveFile", "total_inactive_file":
			ret.TotalInactiveFile = v
		case "totalActiveFile", "total_active_file":
			ret.TotalActiveFile = v
		case "totalUnevictable", "total_unevictable":
			ret.TotalUnevictable = v
		}
	}

	r, err := getCgroupMemFile(containerID, base, "memory.usage_in_bytes")
	if err == nil {
		ret.MemUsageInBytes = r
	}
	r, err = getCgroupMemFile(containerID, base, "memory.max_usage_in_bytes")
	if err == nil {
		ret.MemMaxUsageInBytes = r
	}
	r, err = getCgroupMemFile(containerID, base, "memory.limit_in_bytes")
	if err == nil {
		ret.MemLimitInBytes = r
	}
	r, err = getCgroupMemFile(containerID, base, "memory.failcnt")
	if err == nil {
		ret.MemFailCnt = r
	}

	return ret, nil
}