namespace hmmmm.mem;

// Client → Server: read a contiguous memory region. Server responds with
// MemReadResponse carrying the same nonce as the enclosing ClientMessage.
table MemReadRequest {
    device_id: uint32;
    seg_id:    uint32;
    offset:    uint32;
    length:    uint32;
}

// Server → Client: memory region contents at the moment of the read.
table MemReadResponse {
    tclk:      uint64;   // virtual clock tick at time of read
    device_id: uint32;
    seg_id:    uint32;
    offset:    uint32;
    data:      [ubyte];
}

// Client → Server: write a contiguous memory region. No response.
table MemWriteRequest {
    device_id: uint32;
    seg_id:    uint32;
    offset:    uint32;
    data:      [ubyte];
}

// ── Unions ───────────────────────────────────────────────────────────────────

union MemClientPayload {
    MemReadRequest,
    MemWriteRequest,
}

table MemClientMessage {
    payload: MemClientPayload;
}

union MemServerPayload {
    MemReadResponse,
}

table MemServerMessage {
    payload: MemServerPayload;
}