// SPDX-License-Identifier: BSD-3-Clause //go:build windows package mem import ( "unsafe" "golang.org/x/sys/windows" ) // ExVirtualMemory represents Windows specific information // https://learn.microsoft.com/en-us/windows/win32/api/sysinfoapi/ns-sysinfoapi-memorystatusex // https://learn.microsoft.com/en-us/windows/win32/api/psapi/ns-psapi-performance_information type ExVirtualMemory struct { CommitLimit uint64 `json:"commitLimit"` CommitTotal uint64 `json:"commitTotal"` VirtualTotal uint64 `json:"virtualTotal"` VirtualAvail uint64 `json:"virtualAvail"` } type ExWindows struct{} func NewExWindows() *ExWindows { return &ExWindows{} } func (e *ExWindows) VirtualMemory() (*ExVirtualMemory, error) { var memInfo memoryStatusEx memInfo.cbSize = uint32(unsafe.Sizeof(memInfo)) mem, _, _ := procGlobalMemoryStatusEx.Call(uintptr(unsafe.Pointer(&memInfo))) if mem == 0 { return nil, windows.GetLastError() } var perfInfo performanceInformation perfInfo.cb = uint32(unsafe.Sizeof(perfInfo)) perf, _, _ := procGetPerformanceInfo.Call(uintptr(unsafe.Pointer(&perfInfo)), uintptr(perfInfo.cb)) if perf == 0 { return nil, windows.GetLastError() } ret := &ExVirtualMemory{ CommitLimit: perfInfo.commitLimit * perfInfo.pageSize, CommitTotal: perfInfo.commitTotal * perfInfo.pageSize, VirtualTotal: memInfo.ullTotalVirtual, VirtualAvail: memInfo.ullAvailVirtual, } return ret, nil }