epics_seq/
variables.rs

1use epics_base_rs::types::EpicsValue;
2
3/// Trait implemented by generated program variable structs.
4///
5/// Each SNL program generates a struct holding all program variables.
6/// This trait provides channel-value accessors so the runtime can
7/// transfer values between the channel store and the local snapshot.
8pub trait ProgramVars: Clone + Send + Sync + 'static {
9    /// Read the value of a channel-assigned variable.
10    fn get_channel_value(&self, ch_id: usize) -> EpicsValue;
11
12    /// Write a channel value into the local variable.
13    fn set_channel_value(&mut self, ch_id: usize, value: &EpicsValue);
14}
15
16/// Channel definition: static metadata from the compiled program.
17#[derive(Debug, Clone)]
18pub struct ChannelDef {
19    /// Variable name in the SNL source.
20    pub var_name: String,
21    /// PV name template (may contain macros like {P}).
22    pub pv_name: String,
23    /// Whether this channel has a `monitor` declaration.
24    pub monitored: bool,
25    /// Event flag id synced to this channel (via `sync`), if any.
26    pub sync_ef: Option<usize>,
27}
28
29/// Static program metadata provided by generated code.
30pub trait ProgramMeta {
31    const NUM_CHANNELS: usize;
32    const NUM_EVENT_FLAGS: usize;
33    const NUM_STATE_SETS: usize;
34
35    fn channel_defs() -> Vec<ChannelDef>;
36
37    /// Maps event flag id → list of synced channel ids.
38    fn event_flag_sync_map() -> Vec<Vec<usize>>;
39}
epics_seq/variables.rs

epics_seq/
variables.rs
