59 lines
1.4 KiB
Go
59 lines
1.4 KiB
Go
//go:build darwin && cgo
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// +build darwin,cgo
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package mem
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/*
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#include <mach/mach_host.h>
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#include <mach/vm_page_size.h>
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*/
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import "C"
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import (
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"context"
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"fmt"
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"unsafe"
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)
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// VirtualMemory returns VirtualmemoryStat.
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func VirtualMemory() (*VirtualMemoryStat, error) {
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return VirtualMemoryWithContext(context.Background())
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}
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func VirtualMemoryWithContext(ctx context.Context) (*VirtualMemoryStat, error) {
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count := C.mach_msg_type_number_t(C.HOST_VM_INFO_COUNT)
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var vmstat C.vm_statistics_data_t
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status := C.host_statistics(C.host_t(C.mach_host_self()),
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C.HOST_VM_INFO,
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C.host_info_t(unsafe.Pointer(&vmstat)),
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&count)
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if status != C.KERN_SUCCESS {
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return nil, fmt.Errorf("host_statistics error=%d", status)
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}
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pageSize := uint64(C.vm_kernel_page_size)
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total, err := getHwMemsize()
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if err != nil {
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return nil, err
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}
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totalCount := C.natural_t(total / pageSize)
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availableCount := vmstat.inactive_count + vmstat.free_count
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usedPercent := 100 * float64(totalCount-availableCount) / float64(totalCount)
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usedCount := totalCount - availableCount
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return &VirtualMemoryStat{
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Total: total,
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Available: pageSize * uint64(availableCount),
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Used: pageSize * uint64(usedCount),
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UsedPercent: usedPercent,
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Free: pageSize * uint64(vmstat.free_count),
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Active: pageSize * uint64(vmstat.active_count),
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Inactive: pageSize * uint64(vmstat.inactive_count),
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Wired: pageSize * uint64(vmstat.wire_count),
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}, nil
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}
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