syscall: use ERROR_IO_PENDING value in errnoErr

So errnoErr can be used in other packages.
This is something I missed when I sent CL 28990.

Fixes #17539

Change-Id: I8ee3b79c4d70ca1e5b29e5b40024f7ae9a86061e
Reviewed-on: https://go-review.googlesource.com/29690Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

src/internal/syscall/windows/registry/zsyscall_windows.go

@@ -13,11 +13,11 @@ var _ unsafe.Pointer
 // Do the interface allocations only once for common
 // Errno values.
 const (
-	errnoWSAEINPROGRESS = 10036
+	errnoERROR_IO_PENDING = 997
 )
 
 var (
-	errWSAEINPROGRESS error = syscall.Errno(errnoWSAEINPROGRESS)
+	errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING)
 )
 
 // errnoErr returns common boxed Errno values, to prevent
@@ -26,8 +26,8 @@ func errnoErr(e syscall.Errno) error {
 	switch e {
 	case 0:
 		return nil
-	case errnoWSAEINPROGRESS:
-		return errWSAEINPROGRESS
+	case errnoERROR_IO_PENDING:
+		return errERROR_IO_PENDING
 	}
 	// TODO: add more here, after collecting data on the common
 	// error values see on Windows. (perhaps when running

src/internal/syscall/windows/zsyscall_windows.go

@@ -13,11 +13,11 @@ var _ unsafe.Pointer
 // Do the interface allocations only once for common
 // Errno values.
 const (
-	errnoWSAEINPROGRESS = 10036
+	errnoERROR_IO_PENDING = 997
 )
 
 var (
-	errWSAEINPROGRESS error = syscall.Errno(errnoWSAEINPROGRESS)
+	errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING)
 )
 
 // errnoErr returns common boxed Errno values, to prevent
@@ -26,8 +26,8 @@ func errnoErr(e syscall.Errno) error {
 	switch e {
 	case 0:
 		return nil
-	case errnoWSAEINPROGRESS:
-		return errWSAEINPROGRESS
+	case errnoERROR_IO_PENDING:
+		return errERROR_IO_PENDING
 	}
 	// TODO: add more here, after collecting data on the common
 	// error values see on Windows. (perhaps when running

src/syscall/mksyscall_windows.go

@@ -831,8 +831,12 @@ var _ unsafe.Pointer
 
 // Do the interface allocations only once for common
 // Errno values.
+const (
+	errnoERROR_IO_PENDING = 997
+)
+
 var (
-	errERROR_IO_PENDING error = {{syscalldot}}Errno(ERROR_IO_PENDING)
+	errERROR_IO_PENDING error = {{syscalldot}}Errno(errnoERROR_IO_PENDING)
 )
 
 // errnoErr returns common boxed Errno values, to prevent
@@ -841,7 +845,7 @@ func errnoErr(e {{syscalldot}}Errno) error {
 	switch e {
 	case 0:
 		return nil
-	case ERROR_IO_PENDING:
+	case errnoERROR_IO_PENDING:
 		return errERROR_IO_PENDING
 	}
 	// TODO: add more here, after collecting data on the common

src/syscall/zsyscall_windows.go

@@ -11,8 +11,12 @@ var _ unsafe.Pointer
 
 // Do the interface allocations only once for common
 // Errno values.
+const (
+	errnoERROR_IO_PENDING = 997
+)
+
 var (
-	errERROR_IO_PENDING error = Errno(ERROR_IO_PENDING)
+	errERROR_IO_PENDING error = Errno(errnoERROR_IO_PENDING)
 )
 
 // errnoErr returns common boxed Errno values, to prevent
@@ -21,7 +25,7 @@ func errnoErr(e Errno) error {
 	switch e {
 	case 0:
 		return nil
-	case ERROR_IO_PENDING:
+	case errnoERROR_IO_PENDING:
 		return errERROR_IO_PENDING
 	}
 	// TODO: add more here, after collecting data on the common