Add windows version

- Fix sigar_unix file to not compile on windows
- Start work on windows implementation

sigar_unix.go

@@ -1,9 +1,9 @@
 // Copyright (c) 2012 VMware, Inc.
 
-package sigar
-
 // +build darwin freebsd linux netbsd openbsd
 
+package sigar
+
 import "syscall"
 
 func (self *FileSystemUsage) Get(path string) error {

sigar_windows.go

@@ -0,0 +1,100 @@
+// Copyright (c) 2012 VMware, Inc.
+
+package sigar
+
+// #include <stdlib.h>
+// #include <windows.h>
+import "C"
+
+import (
+	"fmt"
+	"unsafe"
+)
+
+func init() {
+}
+
+func (self *LoadAverage) Get() error {
+	return nil
+}
+
+func (self *Uptime) Get() error {
+	return nil
+}
+
+func (self *Mem) Get() error {
+	var statex C.MEMORYSTATUSEX
+	statex.dwLength = C.DWORD(unsafe.Sizeof(statex))
+
+	succeeded := C.GlobalMemoryStatusEx(&statex)
+	if succeeded == C.FALSE {
+		lastError := C.GetLastError()
+		return fmt.Errorf("GlobalMemoryStatusEx failed with error: %d", int(lastError))
+	}
+
+	self.Total = uint64(statex.ullTotalPhys)
+	return nil
+}
+
+func (self *Swap) Get() error {
+	return notImplemented()
+}
+
+func (self *Cpu) Get() error {
+	return notImplemented()
+}
+
+func (self *CpuList) Get() error {
+	return notImplemented()
+}
+
+func (self *FileSystemList) Get() error {
+	return notImplemented()
+}
+
+func (self *ProcList) Get() error {
+	return notImplemented()
+}
+
+func (self *ProcState) Get(pid int) error {
+	return notImplemented()
+}
+
+func (self *ProcMem) Get(pid int) error {
+	return notImplemented()
+}
+
+func (self *ProcTime) Get(pid int) error {
+	return notImplemented()
+}
+
+func (self *ProcArgs) Get(pid int) error {
+	return notImplemented()
+}
+
+func (self *ProcExe) Get(pid int) error {
+	return notImplemented()
+}
+
+func (self *FileSystemUsage) Get(path string) error {
+	var availableBytes C.ULARGE_INTEGER
+	var totalBytes C.ULARGE_INTEGER
+	var totalFreeBytes C.ULARGE_INTEGER
+
+	pathChars := C.CString(path)
+	defer C.free(unsafe.Pointer(pathChars))
+
+	succeeded := C.GetDiskFreeSpaceEx((*C.CHAR)(pathChars), &availableBytes, &totalBytes, &totalFreeBytes)
+	if succeeded == C.FALSE {
+		lastError := C.GetLastError()
+		return fmt.Errorf("GetDiskFreeSpaceEx failed with error: %d", int(lastError))
+	}
+
+	self.Total = *(*uint64)(unsafe.Pointer(&totalBytes))
+	return nil
+}
+
+func notImplemented() error {
+	panic("Not Implemented")
+	return nil
+}

sigar_windows_test.go

@@ -0,0 +1,32 @@
+package sigar_test
+
+import (
+	"os"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+
+	sigar "github.com/cloudfoundry/gosigar"
+)
+
+var _ = Describe("SigarWindows", func() {
+	Describe("Memory", func() {
+		It("gets the total memory", func() {
+			mem := sigar.Mem{}
+			err := mem.Get()
+
+			Ω(err).ShouldNot(HaveOccurred())
+			Ω(mem.Total).Should(BeNumerically(">", 0))
+		})
+	})
+
+	Describe("Disk", func() {
+		It("gets the total disk space", func() {
+			usage := sigar.FileSystemUsage{}
+			err := usage.Get(os.TempDir())
+
+			Ω(err).ShouldNot(HaveOccurred())
+			Ω(usage.Total).Should(BeNumerically(">", 0))
+		})
+	})
+})