rishi/scryer-prolog
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limit scope of raw mode on stdout to allow interrupts to work

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This commit is contained in:
Mark Thom
2019-09-30 14:09:02 -06:00
parent b26c5c213e
commit 1ec831b2e2
2 changed files with 17 additions and 18 deletions
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1
src/prolog/machine/machine_state_impl.rs
View File

@@ -3180,6 +3180,7 @@ impl MachineState {
let interrupted = INTERRUPT.load(std::sync::atomic::Ordering::Relaxed);
if INTERRUPT.compare_and_swap(interrupted, false, std::sync::atomic::Ordering::Relaxed) {
self.reset();
self.fail = true;
return;
}

30
src/prolog/machine/mod.rs
View File

@@ -604,44 +604,42 @@ impl Machine {
stdout().flush().unwrap();
}
let mut raw_stdout = stdout().into_raw_mode().unwrap();
if !attr_goals.is_empty() {
if bindings.is_empty() {
write!(raw_stdout, "{}", attr_goals).unwrap();
print!("{}", attr_goals);
} else {
write!(raw_stdout, "{}, {}", bindings, attr_goals).unwrap();
print!("{}, {}", bindings, attr_goals);
}
} else if !bindings.is_empty() {
write!(raw_stdout, "{}", bindings).unwrap();
print!("{}", bindings);
}
if self.machine_st.b > 0 {
raw_stdout.flush().unwrap();
let keypress = {
let mut raw_stdout = stdout().into_raw_mode().unwrap();
raw_stdout.flush().unwrap();
next_keypress()
};
let result = match next_keypress() {
let result = match keypress {
ContinueResult::ContinueQuery => {
write!(raw_stdout, " ;\r\n").unwrap();
print!(" ;\r\n");
self.continue_query(&alloc_locs)
}
ContinueResult::Conclude => {
write!(raw_stdout, " ...\r\n").unwrap();
print!(" ...\r\n");
self.machine_st.absorb_snapshot(snapshot);
return;
}
};
let mut raw_stdout = stdout().into_raw_mode().unwrap();
match result {
EvalSession::QueryFailure => {
if self.machine_st.ball.stub.len() > 0 {
self.propagate_exception_to_toplevel(snapshot);
return;
} else {
write!(raw_stdout, "false.\r\n").unwrap();
raw_stdout.flush().unwrap();
print!("false.\r\n");
self.machine_st.absorb_snapshot(snapshot);
return;
}
@@ -655,7 +653,7 @@ impl Machine {
}
} else {
if bindings.is_empty() && attr_goals.is_empty() {
write!(raw_stdout, "true.\r\n").unwrap();
print!("true.\r\n");
} else {
let space = if !attr_goals.is_empty() {
if requires_space(&attr_goals, ".") {
@@ -671,7 +669,7 @@ impl Machine {
}
};
write!(raw_stdout, "{}.\r\n", space).unwrap();
print!("{}.\r\n", space);
}
break;