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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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6
src/protocols/ForeignToplevel.cpp
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@@ -45,7 +45,7 @@ void CForeignToplevelList::onMap(PHLWINDOW pWindow) {
return;
const auto NEWHANDLE = PROTO::foreignToplevel->m_vHandles.emplace_back(
std::make_shared<CForeignToplevelHandle>(std::make_shared<CExtForeignToplevelHandleV1>(resource->client(), resource->version(), 0), pWindow));
makeShared<CForeignToplevelHandle>(makeShared<CExtForeignToplevelHandleV1>(resource->client(), resource->version(), 0), pWindow));
if (!NEWHANDLE->good()) {
LOGM(ERR, "Couldn't create a foreign handle");
@@ -68,7 +68,7 @@ void CForeignToplevelList::onMap(PHLWINDOW pWindow) {
SP<CForeignToplevelHandle> CForeignToplevelList::handleForWindow(PHLWINDOW pWindow) {
std::erase_if(handles, [](const auto& wp) { return wp.expired(); });
const auto IT = std::find_if(handles.begin(), handles.end(), [pWindow](const auto& h) { return h.lock()->window() == pWindow; });
const auto IT = std::find_if(handles.begin(), handles.end(), [pWindow](const auto& h) { return h->window() == pWindow; });
return IT == handles.end() ? SP<CForeignToplevelHandle>{} : IT->lock();
}
@@ -131,7 +131,7 @@ CForeignToplevelProtocol::CForeignToplevelProtocol(const wl_interface* iface, co
}
void CForeignToplevelProtocol::bindManager(wl_client* client, void* data, uint32_t ver, uint32_t id) {
const auto RESOURCE = m_vManagers.emplace_back(std::make_unique<CForeignToplevelList>(std::make_shared<CExtForeignToplevelListV1>(client, ver, id))).get();
const auto RESOURCE = m_vManagers.emplace_back(std::make_unique<CForeignToplevelList>(makeShared<CExtForeignToplevelListV1>(client, ver, id))).get();
if (!RESOURCE->good()) {
LOGM(ERR, "Couldn't create a foreign list");