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var() method for event #210

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Merged
mmghannam merged 1 commit into from
Feb 7, 2025
Merged

var() method for event #210

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24 changes: 23 additions & 1 deletion src/eventhdlr.rs
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Original file line number Diff line number Diff line change
@@ -1,5 +1,8 @@
use crate::{ffi, Model, Solving};
use crate::scip::ScipPtr;
use crate::{ffi, Model, Solving, Variable};
use scip_sys::SCIPeventGetVar;
use std::ops::{BitOr, BitOrAssign};
use std::rc::Rc;

/// Trait used to define custom event handlers.
pub trait Eventhdlr {
Expand Down Expand Up @@ -201,6 +204,7 @@ impl SCIPEventhdlr {
/// Wrapper for the internal SCIP event.
pub struct Event {
pub(crate) raw: *mut ffi::SCIP_EVENT,
pub(crate) scip: Rc<ScipPtr>,
}

impl Event {
Expand All @@ -214,6 +218,23 @@ impl Event {
let event_type = unsafe { ffi::SCIPeventGetType(self.raw) };
EventMask(event_type)
}

/// Returns the associated variable for a variable event
pub fn var(&self) -> Option<Variable> {
if self
.event_type()
.matches(EventMask::VAR_EVENT | EventMask::VAR_FIXED | EventMask::VAR_DELETED)
{
let var_ptr = unsafe { SCIPeventGetVar(self.raw) };
assert!(!var_ptr.is_null());
Some(Variable {
raw: var_ptr,
scip: self.scip.clone(),
})
} else {
None
}
}
}

#[cfg(test)]
Expand Down Expand Up @@ -278,6 +299,7 @@ mod tests {
) {
assert!(self.get_type().matches(event.event_type()));
assert_eq!(eventhdlr.name(), "InternalSCIPEventHdlrTester");
assert!(event.var().is_none())
}
}

Expand Down
9 changes: 6 additions & 3 deletions src/scip.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -640,13 +640,16 @@ impl ScipPtr {
let data_ptr = unsafe { ffi::SCIPeventhdlrGetData(eventhdlr) };
assert!(!data_ptr.is_null());
let eventhdlr_ptr = data_ptr as *mut Box<dyn Eventhdlr>;
let scip_ptr = ScipPtr::from_raw(scip, true);
let scip_ptr = Rc::new(ScipPtr::from_raw(scip, true));
let model = Model {
scip: Rc::new(scip_ptr),
scip: scip_ptr.clone(),
state: Solving,
};
let eventhdlr = SCIPEventhdlr { raw: eventhdlr };
let event = Event { raw: event };
let event = Event {
raw: event,
scip: scip_ptr.clone(),
};
unsafe { (*eventhdlr_ptr).execute(model, eventhdlr, event) };
Retcode::Okay.into()
}
Expand Down
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