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internal: new shared_ptr and weak_ptr implementation (#5883)

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moves std::shared_ptrs to a new implementation

Advantages:
- you can dereference a weak_ptr directly. This will obviously segfault on a nullptr deref if it's expired.
   - this is useful to avoid the .lock() hell where we are 100% sure the pointer _should_ be valid. (and if it isn't, it should throw.)
- weak_ptrs are still valid while the SP is being destroyed.
   - reasoning: while an object (e.g. CWindow) is being destroyed, its `weak_ptr self` should be accessible (the sp is still alive, and so is CWindow), but it's not because by stl it's already expired (to prevent resurrection)
   - this impl solves it differently. w_p is expired, but can still be dereferenced and used. Creating `s_p`s is not possible anymore, though.
   - this is useful in destructors and callbacks.
This commit is contained in:
Vaxry
2024-05-05 17:16:00 +01:00
committed by GitHub
parent 589f758d94
commit 1ed1ce9506
88 changed files with 899 additions and 414 deletions
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4
src/protocols/PointerConstraints.cpp
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@@ -246,7 +246,7 @@ void CPointerConstraintsProtocol::onLockPointer(CZwpPointerConstraintsV1* pMgr,
zwpPointerConstraintsV1Lifetime lifetime) {
const auto CLIENT = pMgr->client();
const auto RESOURCE = m_vConstraints.emplace_back(
std::make_shared<CPointerConstraint>(std::make_shared<CZwpLockedPointerV1>(CLIENT, pMgr->version(), id), wlr_surface_from_resource(surface), region, lifetime));
makeShared<CPointerConstraint>(makeShared<CZwpLockedPointerV1>(CLIENT, pMgr->version(), id), wlr_surface_from_resource(surface), region, lifetime));
onNewConstraint(RESOURCE, pMgr);
}
@@ -255,7 +255,7 @@ void CPointerConstraintsProtocol::onConfinePointer(CZwpPointerConstraintsV1* pMg
zwpPointerConstraintsV1Lifetime lifetime) {
const auto CLIENT = pMgr->client();
const auto RESOURCE = m_vConstraints.emplace_back(
std::make_shared<CPointerConstraint>(std::make_shared<CZwpConfinedPointerV1>(CLIENT, pMgr->version(), id), wlr_surface_from_resource(surface), region, lifetime));
makeShared<CPointerConstraint>(makeShared<CZwpConfinedPointerV1>(CLIENT, pMgr->version(), id), wlr_surface_from_resource(surface), region, lifetime));
onNewConstraint(RESOURCE, pMgr);
}