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.

src/managers/eventLoop/EventLoopManager.cpp

@@ -38,12 +38,12 @@ void CEventLoopManager::onTimerFire() {
     nudgeTimers();
 }
 
-void CEventLoopManager::addTimer(std::shared_ptr<CEventLoopTimer> timer) {
+void CEventLoopManager::addTimer(SP<CEventLoopTimer> timer) {
     m_sTimers.timers.push_back(timer);
     nudgeTimers();
 }
 
-void CEventLoopManager::removeTimer(std::shared_ptr<CEventLoopTimer> timer) {
+void CEventLoopManager::removeTimer(SP<CEventLoopTimer> timer) {
     std::erase_if(m_sTimers.timers, [timer](const auto& t) { return timer == t; });
     nudgeTimers();
 }

src/managers/eventLoop/EventLoopManager.hpp

@@ -2,7 +2,6 @@
 
 #include <condition_variable>
 #include <mutex>
-#include <memory>
 #include <thread>
 #include <wayland-server.h>
 
@@ -13,8 +12,8 @@ class CEventLoopManager {
     CEventLoopManager();
 
     void enterLoop(wl_display* display, wl_event_loop* wlEventLoop);
-    void addTimer(std::shared_ptr<CEventLoopTimer> timer);
-    void removeTimer(std::shared_ptr<CEventLoopTimer> timer);
+    void addTimer(SP<CEventLoopTimer> timer);
+    void removeTimer(SP<CEventLoopTimer> timer);
 
     void onTimerFire();
 
@@ -28,8 +27,8 @@ class CEventLoopManager {
     } m_sWayland;
 
     struct {
-        std::vector<std::shared_ptr<CEventLoopTimer>> timers;
-        int                                           timerfd = -1;
+        std::vector<SP<CEventLoopTimer>> timers;
+        int                              timerfd = -1;
     } m_sTimers;
 };
 

src/managers/eventLoop/EventLoopTimer.cpp

@@ -2,10 +2,8 @@
 #include <limits>
 #include "EventLoopManager.hpp"
 
-CEventLoopTimer::CEventLoopTimer(std::optional<std::chrono::system_clock::duration> timeout, std::function<void(std::shared_ptr<CEventLoopTimer> self, void* data)> cb_,
-                                 void* data_) :
-    cb(cb_),
-    data(data_) {
+CEventLoopTimer::CEventLoopTimer(std::optional<std::chrono::system_clock::duration> timeout, std::function<void(SP<CEventLoopTimer> self, void* data)> cb_, void* data_) :
+    cb(cb_), data(data_) {
 
     if (!timeout.has_value())
         expires.reset();
@@ -40,7 +38,7 @@ bool CEventLoopTimer::cancelled() {
     return wasCancelled;
 }
 
-void CEventLoopTimer::call(std::shared_ptr<CEventLoopTimer> self) {
+void CEventLoopTimer::call(SP<CEventLoopTimer> self) {
     expires.reset();
     cb(self, data);
 }

src/managers/eventLoop/EventLoopTimer.hpp

@@ -4,9 +4,11 @@
 #include <functional>
 #include <optional>
 
+#include "../../helpers/memory/SharedPtr.hpp"
+
 class CEventLoopTimer {
   public:
-    CEventLoopTimer(std::optional<std::chrono::system_clock::duration> timeout, std::function<void(std::shared_ptr<CEventLoopTimer> self, void* data)> cb_, void* data_);
+    CEventLoopTimer(std::optional<std::chrono::system_clock::duration> timeout, std::function<void(SP<CEventLoopTimer> self, void* data)> cb_, void* data_);
 
     // if not specified, disarms.
     // if specified, arms.
@@ -19,11 +21,11 @@ class CEventLoopTimer {
 
     bool  cancelled();
     // resets expires
-    void call(std::shared_ptr<CEventLoopTimer> self);
+    void call(SP<CEventLoopTimer> self);
 
   private:
-    std::function<void(std::shared_ptr<CEventLoopTimer> self, void* data)> cb;
-    void*                                                                  data = nullptr;
-    std::optional<std::chrono::system_clock::time_point>                   expires;
-    bool                                                                   wasCancelled = false;
+    std::function<void(SP<CEventLoopTimer> self, void* data)> cb;
+    void*                                                     data = nullptr;
+    std::optional<std::chrono::system_clock::time_point>      expires;
+    bool                                                      wasCancelled = false;
 };