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ksupport: fix rpc, cache signature (FFI)
The reason of the borrow stuff is explained in M-Labs/artiq-zynq#76 (artiq-zyna repo). As for `cache_get()`, compiler will perform stack allocation to pre-allocate the returned structure, and pass to cache_get alongside the `key`. However, ksupport fails to recognize the passed memory, so it will always assume the passed memory as the key.
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@ -122,7 +122,7 @@ pub extern fn send_to_rtio_log(text: CSlice<u8>) {
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}
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#[unwind(aborts)]
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extern fn rpc_send(service: u32, tag: CSlice<u8>, data: *const *const ()) {
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extern fn rpc_send(service: u32, tag: &CSlice<u8>, data: *const *const ()) {
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while !rpc_queue::empty() {}
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send(&RpcSend {
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async: false,
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@ -133,7 +133,7 @@ extern fn rpc_send(service: u32, tag: CSlice<u8>, data: *const *const ()) {
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}
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#[unwind(aborts)]
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extern fn rpc_send_async(service: u32, tag: CSlice<u8>, data: *const *const ()) {
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extern fn rpc_send_async(service: u32, tag: &CSlice<u8>, data: *const *const ()) {
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while rpc_queue::full() {}
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rpc_queue::enqueue(|mut slice| {
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let length = {
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@ -203,15 +203,20 @@ fn terminate(exception: &eh_artiq::Exception, backtrace: &mut [usize]) -> ! {
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}
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#[unwind(aborts)]
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extern fn cache_get(key: CSlice<u8>) -> CSlice<'static, i32> {
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send(&CacheGetRequest {
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key: str::from_utf8(key.as_ref()).unwrap()
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});
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recv!(&CacheGetReply { value } => value.as_c_slice())
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extern fn cache_get<'a>(ret: &'a mut CSlice<i32>, key: &CSlice<u8>) -> &'a CSlice<'a, i32> {
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unsafe {
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send(&CacheGetRequest {
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key: str::from_utf8(key.as_ref()).unwrap()
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});
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recv!(&CacheGetReply { value } => {
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*ret = value.as_c_slice();
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ret
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})
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}
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}
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#[unwind(allowed)]
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extern fn cache_put(key: CSlice<u8>, list: CSlice<i32>) {
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extern fn cache_put(key: &CSlice<u8>, list: &CSlice<i32>) {
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send(&CachePutRequest {
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key: str::from_utf8(key.as_ref()).unwrap(),
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value: list.as_ref()
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@ -456,7 +461,7 @@ unsafe fn attribute_writeback(typeinfo: *const ()) {
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attributes = attributes.offset(1);
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if (*attribute).tag.len() > 0 {
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rpc_send_async(0, (*attribute).tag, [
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rpc_send_async(0, &(*attribute).tag, [
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&object as *const _ as *const (),
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&(*attribute).name as *const _ as *const (),
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(object as usize + (*attribute).offset) as *const ()
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