Simplify struct usage and comments

Signed-off-by: Ben Ridley <benridley29@gmail.com>

headers/psapi/psapi.go

@@ -6,38 +6,20 @@ import (
 	"golang.org/x/sys/windows"
 )
 
-// LPPerformanceInformation is a wrapper of the PERFORMANCE_INFORMATION struct.
+// PerformanceInformation is a wrapper of the PERFORMANCE_INFORMATION struct.
 // https://docs.microsoft.com/en-us/windows/win32/api/psapi/ns-psapi-performance_information
-type LPPerformanceInformation struct {
-	cb                uint32
-	CommitTotal       *uint32
-	CommitLimit       *uint32
-	CommitPeak        *uint32
-	PhysicalTotal     *uint32
-	PhysicalAvailable *uint32
-	SystemCache       *uint32
-	KernelTotal       *uint32
-	KernelPaged       *uint32
-	KernelNonpaged    *uint32
-	PageSize          *uint32
-	HandleCount       uint32
-	ProcessCount      uint32
-	ThreadCount       uint32
-}
-
-// PerformanceInformation is a dereferenced version of LPPerformanceInformation
 type PerformanceInformation struct {
 	cb                uint32
-	CommitTotal       uint32
-	CommitLimit       uint32
-	CommitPeak        uint32
-	PhysicalTotal     uint32
-	PhysicalAvailable uint32
-	SystemCache       uint32
-	KernelTotal       uint32
-	KernelPaged       uint32
-	KernelNonpaged    uint32
-	PageSize          uint32
+	CommitTotal       uint
+	CommitLimit       uint
+	CommitPeak        uint
+	PhysicalTotal     uint
+	PhysicalAvailable uint
+	SystemCache       uint
+	KernelTotal       uint
+	KernelPaged       uint
+	KernelNonpaged    uint
+	PageSize          uint
 	HandleCount       uint32
 	ProcessCount      uint32
 	ThreadCount       uint32
@@ -48,24 +30,9 @@ var (
 	procGetPerformanceInfo = psapi.NewProc("GetPerformanceInfo")
 )
 
-// GetLPPerformanceInfo retrieves the performance values contained in the LPPerformanceInformation structure.
-// https://docs.microsoft.com/en-us/windows/win32/api/psapi/nf-psapi-getperformanceinfo
-func GetLPPerformanceInfo() (LPPerformanceInformation, error) {
-	var pi LPPerformanceInformation
-	size := (uint32)(unsafe.Sizeof(pi))
-	pi.cb = size
-	r1, _, err := procGetPerformanceInfo.Call(uintptr(unsafe.Pointer(&pi)), uintptr(size))
-
-	if ret := *(*bool)(unsafe.Pointer(&r1)); !ret {
-		return LPPerformanceInformation{}, err
-	}
-
-	return pi, nil
-}
-
 // GetPerformanceInfo returns the dereferenced version of GetLPPerformanceInfo.
 func GetPerformanceInfo() (PerformanceInformation, error) {
-	var lppi LPPerformanceInformation
+	var lppi PerformanceInformation
 	size := (uint32)(unsafe.Sizeof(lppi))
 	lppi.cb = size
 	r1, _, err := procGetPerformanceInfo.Call(uintptr(unsafe.Pointer(&lppi)), uintptr(size))
@@ -74,21 +41,5 @@ func GetPerformanceInfo() (PerformanceInformation, error) {
 		return PerformanceInformation{}, err
 	}
 
-	var pi PerformanceInformation
-	pi.cb = lppi.cb
-	pi.CommitTotal = *(lppi.CommitTotal)
-	pi.CommitLimit = *(lppi.CommitLimit)
-	pi.CommitPeak = *(lppi.CommitPeak)
-	pi.PhysicalTotal = *(lppi.PhysicalTotal)
-	pi.PhysicalAvailable = *(lppi.PhysicalAvailable)
-	pi.SystemCache = *(lppi.SystemCache)
-	pi.KernelTotal = *(lppi.KernelTotal)
-	pi.KernelPaged = *(lppi.KernelPaged)
-	pi.KernelNonpaged = *(lppi.KernelNonpaged)
-	pi.PageSize = *(lppi.PageSize)
-	pi.HandleCount = lppi.HandleCount
-	pi.ProcessCount = lppi.ProcessCount
-	pi.ThreadCount = lppi.ThreadCount
-
-	return pi, nil
+	return lppi, nil
 }

headers/sysinfoapi/sysinfoapi.go

@@ -1,7 +1,6 @@
 package sysinfoapi
 
 import (
-	"fmt"
 	"unicode/utf16"
 	"unsafe"
 
@@ -129,12 +128,11 @@ func GlobalMemoryStatusEx() (MemoryStatus, error) {
 	}, nil
 }
 
-// GetSystemInfo wraps the GetSystemInfo function from sysinfoapi
+// GetSystemInfo is an idiomatic wrapper for the GetSystemInfo function from sysinfoapi
 // https://docs.microsoft.com/en-us/windows/win32/api/sysinfoapi/nf-sysinfoapi-getsysteminfo
 func GetSystemInfo() SystemInfo {
 	var info lpSystemInfo
 	procGetSystemInfo.Call(uintptr(unsafe.Pointer(&info)))
-	fmt.Printf("%+v", info)
 	return SystemInfo{
 		Arch:                      ProcessorArchitecture(info.Arch.WProcessorArchitecture),
 		PageSize:                  info.DwPageSize,