78 lines
2 KiB
Go
78 lines
2 KiB
Go
package mem_test
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import (
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"testing"
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"unsafe"
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"git.brut.systems/judah/xx/mem"
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"git.brut.systems/judah/xx/testx"
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)
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func TestBitCast(t *testing.T) {
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a := uint32(0xFFFF_FFFF)
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b := mem.BitCast[float32](&a)
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c := mem.BitCast[uint32](&b)
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if a != c {
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t.Fail()
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}
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v := uint8(0xFF)
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d := mem.BitCast[int8](&v)
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if d != -1 {
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t.Fail()
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}
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e := mem.BitCast[uint8](&d)
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if e != 255 {
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t.Fail()
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}
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}
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func TestAllocationPrimitives(t *testing.T) {
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t.Run("reserve, unreserve", func(t *testing.T) {
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data, err := mem.Reserve(1 * mem.Gigabyte)
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testx.Expect(t, err == nil, "mem.Reserve returned an error - %s", err)
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testx.Expect(t, len(data) == 1*mem.Gigabyte, "len was %d", len(data))
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testx.Expect(t, cap(data) == 1*mem.Gigabyte, "len was %d", cap(data))
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err = mem.Release(data)
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testx.Expect(t, err == nil, "mem.Unreserve returned an error - %s", err)
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})
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t.Run("commit", func(t *testing.T) {
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data, err := mem.Reserve(1 * mem.Gigabyte)
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testx.Expect(t, err == nil, "mem.Reserve returned an error - %s", err)
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err = mem.Commit(data, mem.AccessRead|mem.AccessWrite)
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testx.Expect(t, err == nil, "mem.Commit returned an error - %s", err)
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for i := range data {
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data[i] = byte(i * i)
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}
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})
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t.Run("decommit", func(t *testing.T) {
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data, err := mem.Reserve(1 * mem.Gigabyte)
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testx.Expect(t, err == nil, "mem.Reserve returned an error - %s", err)
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err = mem.Commit(data, mem.AccessRead|mem.AccessWrite)
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testx.Expect(t, err == nil, "mem.Commit returned an error - %s", err)
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before := uintptr(unsafe.Pointer(&data[0]))
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err = mem.Decommit(data)
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testx.Expect(t, err == nil, "mem.Decommit returned an error - %s", err)
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// accessing data before recommitting it will fail
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err = mem.Commit(data, mem.AccessRead|mem.AccessWrite)
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testx.Expect(t, err == nil, "mem.Commit returned an error - %s", err)
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after := uintptr(unsafe.Pointer(&data[0]))
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testx.Expect(t, before == after, "base pointers did not match between after recommit %d != %d", before, after)
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for i := range data {
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data[i] = byte(i * i)
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}
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})
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}
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