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misc/cgo: prepare for 64-bit ints

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In a few places, the existing cgo tests assume that a
Go int is the same as a C int. Making int 64 bits wide
on 64-bit platforms violates this assumption.
Change that code to assume that Go int32 and C int
are the same instead. That's still not great, but it's better,
and I am unaware of any systems we run on where it is not true.

Update #2188.

R=iant, r
CC=golang-dev
https://golang.org/cl/6552064
This commit is contained in:
Russ Cox 2012-09-24 14:58:45 -04:00
parent 0b08c9483f
commit 0a006b4923
3 changed files with 4 additions and 4 deletions
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4
misc/cgo/life/life.go
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@ -11,8 +11,8 @@ import "C"
import "unsafe" import "unsafe"
func Run(gen, x, y int, a []int) { func Run(gen, x, y int, a []int32) {
n := make([]int, x*y) n := make([]int32, x*y)
for i := 0; i < gen; i++ { for i := 0; i < gen; i++ {
C.Step(C.int(x), C.int(y), (*C.int)(unsafe.Pointer(&a[0])), (*C.int)(unsafe.Pointer(&n[0]))) C.Step(C.int(x), C.int(y), (*C.int)(unsafe.Pointer(&a[0])), (*C.int)(unsafe.Pointer(&n[0])))
copy(a, n) copy(a, n)

2
misc/cgo/life/main.go
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@ -24,7 +24,7 @@ var gen = flag.Int("gen", 10, "generations")
func main() { func main() {
flag.Parse() flag.Parse()
var a [MAXDIM * MAXDIM]int var a [MAXDIM * MAXDIM]int32
for i := 2; i < *dim; i += 8 { for i := 2; i < *dim; i += 8 {
for j := 2; j < *dim-3; j += 8 { for j := 2; j < *dim-3; j += 8 {
for y := 0; y < 3; y++ { for y := 0; y < 3; y++ {

2
misc/cgo/test/issue1560.go
View File

@ -28,7 +28,7 @@ func parallelSleep(n int) {
} }
//export BackgroundSleep //export BackgroundSleep
func BackgroundSleep(n int) { func BackgroundSleep(n int32) {
go func() { go func() {
C.sleep(C.uint(n)) C.sleep(C.uint(n))
sleepDone <- true sleepDone <- true