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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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12
src/managers/HookSystemManager.cpp
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@@ -7,16 +7,16 @@ CHookSystemManager::CHookSystemManager() {
}
// returns the pointer to the function
std::shared_ptr<HOOK_CALLBACK_FN> CHookSystemManager::hookDynamic(const std::string& event, HOOK_CALLBACK_FN fn, HANDLE handle) {
std::shared_ptr<HOOK_CALLBACK_FN> hookFN = std::make_shared<HOOK_CALLBACK_FN>(fn);
SP<HOOK_CALLBACK_FN> CHookSystemManager::hookDynamic(const std::string& event, HOOK_CALLBACK_FN fn, HANDLE handle) {
SP<HOOK_CALLBACK_FN> hookFN = makeShared<HOOK_CALLBACK_FN>(fn);
m_mRegisteredHooks[event].emplace_back(SCallbackFNPtr{.fn = hookFN, .handle = handle});
return hookFN;
}
void CHookSystemManager::unhook(std::shared_ptr<HOOK_CALLBACK_FN> fn) {
void CHookSystemManager::unhook(SP<HOOK_CALLBACK_FN> fn) {
for (auto& [k, v] : m_mRegisteredHooks) {
std::erase_if(v, [&](const auto& other) {
std::shared_ptr<HOOK_CALLBACK_FN> fn_ = other.fn.lock();
SP<HOOK_CALLBACK_FN> fn_ = other.fn.lock();
return fn_.get() == fn.get();
});
@@ -37,7 +37,7 @@ void CHookSystemManager::emit(std::vector<SCallbackFNPtr>* const callbacks, SCal
if (!cb.handle) {
// we don't guard hl hooks
if (std::shared_ptr<HOOK_CALLBACK_FN> fn = cb.fn.lock())
if (SP<HOOK_CALLBACK_FN> fn = cb.fn.lock())
(*fn)(fn.get(), info, data);
else
needsDeadCleanup = true;
@@ -51,7 +51,7 @@ void CHookSystemManager::emit(std::vector<SCallbackFNPtr>* const callbacks, SCal
try {
if (!setjmp(m_jbHookFaultJumpBuf)) {
if (std::shared_ptr<HOOK_CALLBACK_FN> fn = cb.fn.lock())
if (SP<HOOK_CALLBACK_FN> fn = cb.fn.lock())
(*fn)(fn.get(), info, data);
else
needsDeadCleanup = true;