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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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10
src/managers/HookSystemManager.hpp
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@@ -16,8 +16,8 @@
typedef std::function<void(void*, SCallbackInfo& info, std::any data)> HOOK_CALLBACK_FN;
struct SCallbackFNPtr {
std::weak_ptr<HOOK_CALLBACK_FN> fn;
HANDLE handle = nullptr;
WP<HOOK_CALLBACK_FN> fn;
HANDLE handle = nullptr;
};
#define EMIT_HOOK_EVENT(name, param) \
@@ -43,9 +43,9 @@ class CHookSystemManager {
// returns the pointer to the function.
// losing this pointer (letting it get destroyed)
// will equal to unregistering the callback.
[[nodiscard("Losing this pointer instantly unregisters the callback")]] std::shared_ptr<HOOK_CALLBACK_FN> hookDynamic(const std::string& event, HOOK_CALLBACK_FN fn,
HANDLE handle = nullptr);
void unhook(std::shared_ptr<HOOK_CALLBACK_FN> fn);
[[nodiscard("Losing this pointer instantly unregisters the callback")]] SP<HOOK_CALLBACK_FN> hookDynamic(const std::string& event, HOOK_CALLBACK_FN fn,
HANDLE handle = nullptr);
void unhook(SP<HOOK_CALLBACK_FN> fn);
void emit(std::vector<SCallbackFNPtr>* const callbacks, SCallbackInfo& info, std::any data = 0);
std::vector<SCallbackFNPtr>* getVecForEvent(const std::string& event);