internal: new shared_ptr and weak_ptr implementation (#5883)

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.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/events/Windows.cpp b/src/events/Windows.cpp
index e3d06691..db4e0985 100644
--- a/src/events/Windows.cpp
+++ b/src/events/Windows.cpp
@@ -729,7 +729,7 @@ void Events::listener_unmapWindow(void* owner, void* data) {
 
     // swallowing
     if (valid(PWINDOW->m_pSwallowed)) {
-        PWINDOW->m_pSwallowed.lock()->setHidden(false);
+        PWINDOW->m_pSwallowed->setHidden(false);
         g_pLayoutManager->getCurrentLayout()->onWindowCreated(PWINDOW->m_pSwallowed.lock());
         PWINDOW->m_pSwallowed.reset();
     }
@@ -1024,7 +1024,7 @@ void Events::listener_activateX11(void* owner, void* data) {
 
         Debug::log(LOG, "Unmanaged X11 {} requests activate", PWINDOW);
 
-        if (g_pCompositor->m_pLastWindow.lock() && g_pCompositor->m_pLastWindow.lock()->getPID() != PWINDOW->getPID())
+        if (g_pCompositor->m_pLastWindow.lock() && g_pCompositor->m_pLastWindow->getPID() != PWINDOW->getPID())
             return;
 
         if (!wlr_xwayland_or_surface_wants_focus(PWINDOW->m_uSurface.xwayland))