mirror of
https://github.com/ceph/go-ceph
synced 2025-03-11 05:48:22 +00:00
b8a803ccbb
The main motivation for PtrGuard was read and write buffers as they are used in iovec. This change uses SyncBuffer for the iovec implementation, so that the no-copy PtrGuard implementation can be enabled with the with_ptrguard build tag. Signed-off-by: Sven Anderson <sven@redhat.com>
59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
package cutil
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import (
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"testing"
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"unsafe"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestIovec(t *testing.T) {
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strs := []string{
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"foo",
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"barbar",
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"bazbazbaz",
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}
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var data [][]byte
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for _, s := range strs {
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data = append(data, []byte(s))
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}
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iovec := ByteSlicesToIovec(data)
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p := iovec.Pointer()
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assert.NotNil(t, p)
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assert.Equal(t, iovec.Len(), len(data))
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assert.Equal(t, p, unsafe.Pointer(&iovec.iovec[0]))
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for i, iov := range iovec.iovec {
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require.NotNil(t, iov.iov_base)
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assert.Equal(t, int(iov.iov_len), len(data[i]))
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assert.Equal(t, data[i], (*[MaxIdx]byte)(iov.iov_base)[:iov.iov_len:iov.iov_len])
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}
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// data didn't change
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for i, b := range data {
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assert.Equal(t, string(b), strs[i])
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}
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// clear iovec buffers
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for _, iov := range iovec.iovec {
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b := (*[MaxIdx]byte)(iov.iov_base)[:iov.iov_len:iov.iov_len]
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for i := range b {
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b[i] = 0
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}
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}
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iovec.Sync()
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// data must be cleared
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for _, b := range data {
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for i := range b {
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assert.Zero(t, b[i])
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}
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}
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iovec.Free()
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for _, iov := range iovec.iovec {
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assert.Equal(t, iov.iov_base, unsafe.Pointer(nil))
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assert.Zero(t, iov.iov_len)
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}
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iovec.Free()
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iovec.Sync()
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iovec.Sync()
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iovec.Free()
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}
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