* rename misleading variable check_again to never_check_again
The first element of collision_result means "never check again" per the
typedef comment, but was destructured as check_again (opposite meaning).
Rename to never_check_again to match the actual semantics and prevent
future confusion.
Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
* fix data races in ship-weapon collision threading
Two thread-safety bugs in ship_weapon_check_collision, which runs on
worker threads:
1. update_danger_weapon() wrote to Ai_info[] (danger_weapon_objnum,
danger_weapon_signature) without synchronization. Multiple weapons
targeting the same ship would race on the same Ai_info entry.
2. Homing missile detonation logic wrote wp->lifeleft and
wp->weapon_flags directly on the Weapons[] global array.
Fix: defer both writes to the main-thread post-processing phase via
new flags in ship_weapon_collision_data. Also convert the collision
data from a 6-element tuple to a named struct for readability.
Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
* fix data race in ship-ship collision submodel checking
ship_ship_check_collision() toggled pmi->submodel[].collision_checked
flags on the heavy ship's polymodel_instance to selectively enable/
disable submodel collision checks. When two collision pairs shared the
same heavy ship, worker threads would race on the same pmi entries.
Fix: add a collision_checked_override pointer to mc_info that lets
callers provide a thread-local array of collision_checked values.
model_collide() uses the override when set, falling back to the
pmi->submodel[] field otherwise. ship_ship_check_collision() now
builds a local SCP_vector<char> and passes it via the override,
completely avoiding writes to shared polymodel_instance state.
Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
* Ensure threads have spun down before continuing non-threaded execution
* address review feedback for ship-weapon collision threading
- postproc flag now accumulates incrementally instead of being OR'd
at the final return, ensuring all return paths respect it
- early return for predictive collisions now preserves the
should_update_danger_weapon flag in the collision data
- moved nprintf detonation debug print to the main-thread process
pass for thread safety
Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
* move collision_checked from pmi into mc_info for thread safety
collision_checked flags were transient per-collision-pass state that
didn't belong in the shared polymodel_instance. Now mc_info owns an
SCP_vector<char> that model_collide auto-initializes from pmi when
empty. All collision callers (ship-ship, asteroid, debris, prop)
updated to manipulate mc.collision_checked instead of pmi->submodel[].
Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>
* Convert to CV and spinup counter
* Update comment
---------
Co-authored-by: Claude Opus 4.6 (1M context) <[email protected]>
Co-authored-by: BMagnu <[email protected]>
* get proper number of physical cpu cores on macOS
macOS has an easy way to get the physical cpu count so let's use it. Also with
Apple Silicon there are performance and efficiency cores so we need to make
sure we ignore those low-perf cores when getting the count.
* improve error handling
