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, 10 insertions, 5 deletions

diff --git a/src/render/decorations/DecorationPositioner.cpp b/src/render/decorations/DecorationPositioner.cpp
index 39aacd81..d46af035 100644
--- a/src/render/decorations/DecorationPositioner.cpp
+++ b/src/render/decorations/DecorationPositioner.cpp
@@ -85,12 +85,17 @@ CDecorationPositioner::SWindowPositioningData* CDecorationPositioner::getDataFor
 }
 
 void CDecorationPositioner::sanitizeDatas() {
-    std::erase_if(m_mWindowDatas, [](const auto& other) { return !valid(other.first); });
+    std::erase_if(m_mWindowDatas, [](const auto& other) {
+        if (!valid(other.first))
+            return true;
+
+        return false;
+    });
     std::erase_if(m_vWindowPositioningDatas, [](const auto& other) {
         if (!validMapped(other->pWindow))
             return true;
-        if (std::find_if(other->pWindow.lock()->m_dWindowDecorations.begin(), other->pWindow.lock()->m_dWindowDecorations.end(),
-                         [&](const auto& el) { return el.get() == other->pDecoration; }) == other->pWindow.lock()->m_dWindowDecorations.end())
+        if (std::find_if(other->pWindow->m_dWindowDecorations.begin(), other->pWindow->m_dWindowDecorations.end(),
+                         [&](const auto& el) { return el.get() == other->pDecoration; }) == other->pWindow->m_dWindowDecorations.end())
             return true;
         return false;
     });
@@ -302,7 +307,7 @@ SWindowDecorationExtents CDecorationPositioner::getWindowDecorationExtents(PHLWI
         CBox decoBox;
 
         if (data->positioningInfo.policy == DECORATION_POSITION_ABSOLUTE) {
-            decoBox = data->pWindow.lock()->getWindowMainSurfaceBox();
+            decoBox = data->pWindow->getWindowMainSurfaceBox();
             decoBox.addExtents(data->positioningInfo.desiredExtents);
         } else {
             decoBox              = data->lastReply.assignedGeometry;
@@ -340,7 +345,7 @@ CBox CDecorationPositioner::getBoxWithIncludedDecos(PHLWINDOW pWindow) {
         CBox decoBox;
 
         if (data->positioningInfo.policy == DECORATION_POSITION_ABSOLUTE) {
-            decoBox = data->pWindow.lock()->getWindowMainSurfaceBox();
+            decoBox = data->pWindow->getWindowMainSurfaceBox();
             decoBox.addExtents(data->positioningInfo.desiredExtents);
         } else {
             decoBox              = data->lastReply.assignedGeometry;