diff options
Diffstat (limited to 'indra/llcommon')
| -rw-r--r-- | indra/llcommon/llsingleton.cpp | 71 | ||||
| -rw-r--r-- | indra/llcommon/llsingleton.h | 409 | ||||
| -rw-r--r-- | indra/llcommon/tests/lleventcoro_test.cpp | 33 | ||||
| -rw-r--r-- | indra/llcommon/tests/lleventdispatcher_test.cpp | 83 | ||||
| -rw-r--r-- | indra/llcommon/tests/lleventfilter_test.cpp | 12 | ||||
| -rw-r--r-- | indra/llcommon/tests/llinstancetracker_test.cpp | 33 | ||||
| -rw-r--r-- | indra/llcommon/tests/lllazy_test.cpp | 13 | ||||
| -rw-r--r-- | indra/llcommon/tests/llleap_test.cpp | 20 | ||||
| -rw-r--r-- | indra/llcommon/tests/llprocess_test.cpp | 16 | ||||
| -rw-r--r-- | indra/llcommon/tests/llsingleton_test.cpp | 133 | ||||
| -rw-r--r-- | indra/llcommon/tests/wrapllerrs.h | 26 |
11 files changed, 610 insertions, 239 deletions
diff --git a/indra/llcommon/llsingleton.cpp b/indra/llcommon/llsingleton.cpp index 9fbd78a000..c45c144570 100644 --- a/indra/llcommon/llsingleton.cpp +++ b/indra/llcommon/llsingleton.cpp @@ -134,12 +134,6 @@ LLSingletonBase::list_t& LLSingletonBase::get_initializing() return LLSingletonBase::MasterList::instance().get_initializing_(); } -//static -LLSingletonBase::list_t& LLSingletonBase::get_initializing_from(MasterList* master) -{ - return master->get_initializing_(); -} - LLSingletonBase::~LLSingletonBase() {} void LLSingletonBase::push_initializing(const char* name) @@ -156,7 +150,7 @@ void LLSingletonBase::pop_initializing() if (list.empty()) { logerrs("Underflow in stack of currently-initializing LLSingletons at ", - demangle(typeid(*this).name()).c_str(), "::getInstance()"); + classname(this).c_str(), "::getInstance()"); } // Now we know list.back() exists: capture it @@ -178,14 +172,39 @@ void LLSingletonBase::pop_initializing() if (back != this) { logerrs("Push/pop mismatch in stack of currently-initializing LLSingletons: ", - demangle(typeid(*this).name()).c_str(), "::getInstance() trying to pop ", - demangle(typeid(*back).name()).c_str()); + classname(this).c_str(), "::getInstance() trying to pop ", + classname(back).c_str()); } // log AFTER popping so logging singletons don't cry circularity log_initializing("Popping", typeid(*back).name()); } +void LLSingletonBase::reset_initializing(list_t::size_type size) +{ + // called for cleanup in case the LLSingleton subclass constructor throws + // an exception + + // The tricky thing about this, the reason we have a separate method + // instead of just calling pop_initializing(), is (hopefully remote) + // possibility that the exception happened *before* the + // push_initializing() call in LLSingletonBase's constructor. So only + // remove the stack top if in fact we've pushed something more than the + // previous size. + list_t& list(get_initializing()); + + while (list.size() > size) + { + list.pop_back(); + } + + // as in pop_initializing() + if (list.empty()) + { + MasterList::instance().cleanup_initializing_(); + } +} + //static void LLSingletonBase::log_initializing(const char* verb, const char* name) { @@ -197,7 +216,7 @@ void LLSingletonBase::log_initializing(const char* verb, const char* name) ri != rend; ++ri) { LLSingletonBase* sb(*ri); - LL_CONT << ' ' << demangle(typeid(*sb).name()); + LL_CONT << ' ' << classname(sb); } LL_ENDL; } @@ -231,7 +250,7 @@ void LLSingletonBase::capture_dependency(list_t& initializing, EInitState initSt // 'found' is an iterator; *found is an LLSingletonBase*; **found // is the actual LLSingletonBase instance. LLSingletonBase* foundp(*found); - out << demangle(typeid(*foundp).name()) << " -> "; + out << classname(foundp) << " -> "; } // We promise to capture dependencies from both the constructor // and the initSingleton() method, so an LLSingleton's instance @@ -245,7 +264,7 @@ void LLSingletonBase::capture_dependency(list_t& initializing, EInitState initSt if (initState == CONSTRUCTING) { logerrs("LLSingleton circularity in Constructor: ", out.str().c_str(), - demangle(typeid(*this).name()).c_str(), ""); + classname(this).c_str(), ""); } else if (it_next == initializing.end()) { @@ -256,14 +275,14 @@ void LLSingletonBase::capture_dependency(list_t& initializing, EInitState initSt // Example: LLNotifications singleton initializes default channels. // Channels register themselves with singleton once done. logdebugs("LLSingleton circularity: ", out.str().c_str(), - demangle(typeid(*this).name()).c_str(), ""); + classname(this).c_str(), ""); } else { // Actual circularity with other singleton (or single singleton is used extensively). // Dependency can be unclear. logwarns("LLSingleton circularity: ", out.str().c_str(), - demangle(typeid(*this).name()).c_str(), ""); + classname(this).c_str(), ""); } } else @@ -276,8 +295,8 @@ void LLSingletonBase::capture_dependency(list_t& initializing, EInitState initSt if (current->mDepends.insert(this).second) { // only log the FIRST time we hit this dependency! - logdebugs(demangle(typeid(*current).name()).c_str(), - " depends on ", demangle(typeid(*this).name()).c_str()); + logdebugs(classname(current).c_str(), + " depends on ", classname(this).c_str()); } } } @@ -336,19 +355,19 @@ void LLSingletonBase::cleanupAll() sp->mCleaned = true; logdebugs("calling ", - demangle(typeid(*sp).name()).c_str(), "::cleanupSingleton()"); + classname(sp).c_str(), "::cleanupSingleton()"); try { sp->cleanupSingleton(); } catch (const std::exception& e) { - logwarns("Exception in ", demangle(typeid(*sp).name()).c_str(), + logwarns("Exception in ", classname(sp).c_str(), "::cleanupSingleton(): ", e.what()); } catch (...) { - logwarns("Unknown exception in ", demangle(typeid(*sp).name()).c_str(), + logwarns("Unknown exception in ", classname(sp).c_str(), "::cleanupSingleton()"); } } @@ -363,7 +382,7 @@ void LLSingletonBase::deleteAll() { // Capture the class name first: in case of exception, don't count on // being able to extract it later. - const std::string name = demangle(typeid(*sp).name()); + const std::string name = classname(sp); try { // Call static method through instance function pointer. @@ -440,7 +459,17 @@ void LLSingletonBase::logerrs(const char* p1, const char* p2, const char* p3, co log(LLError::LEVEL_ERROR, p1, p2, p3, p4); // The other important side effect of LL_ERRS() is // https://www.youtube.com/watch?v=OMG7paGJqhQ (emphasis on OMG) - LLError::crashAndLoop(std::string()); + std::ostringstream out; + out << p1 << p2 << p3 << p4; + auto crash = LLError::getFatalFunction(); + if (crash) + { + crash(out.str()); + } + else + { + LLError::crashAndLoop(out.str()); + } } std::string LLSingletonBase::demangle(const char* mangled) diff --git a/indra/llcommon/llsingleton.h b/indra/llcommon/llsingleton.h index d4938ed9b7..7def9b019c 100644 --- a/indra/llcommon/llsingleton.h +++ b/indra/llcommon/llsingleton.h @@ -31,6 +31,18 @@ #include <vector> #include <typeinfo> +#if LL_WINDOWS +#pragma warning (push) +#pragma warning (disable:4265) +#endif +// warning C4265: 'std::_Pad' : class has virtual functions, but destructor is not virtual + +#include <mutex> + +#if LL_WINDOWS +#pragma warning (pop) +#endif + class LLSingletonBase: private boost::noncopyable { public: @@ -43,7 +55,6 @@ private: // This, on the other hand, is a stack whose top indicates the LLSingleton // currently being initialized. static list_t& get_initializing(); - static list_t& get_initializing_from(MasterList*); // Produce a vector<LLSingletonBase*> of master list, in dependency order. typedef std::vector<LLSingletonBase*> vec_t; static vec_t dep_sort(); @@ -57,10 +68,11 @@ protected: typedef enum e_init_state { UNINITIALIZED = 0, // must be default-initialized state - CONSTRUCTING, - INITIALIZING, - INITIALIZED, - DELETED + CONSTRUCTING, // within DERIVED_TYPE constructor + CONSTRUCTED, // finished DERIVED_TYPE constructor + INITIALIZING, // within DERIVED_TYPE::initSingleton() + INITIALIZED, // normal case + DELETED // deleteSingleton() or deleteAll() called } EInitState; // Define tag<T> to pass to our template constructor. You can't explicitly @@ -100,6 +112,9 @@ protected: // That being the case, we control exactly when it happens -- and we can // pop the stack immediately thereafter. void pop_initializing(); + // Remove 'this' from the init stack in case of exception in the + // LLSingleton subclass constructor. + static void reset_initializing(list_t::size_type size); private: // logging static void log_initializing(const char* verb, const char* name); @@ -115,6 +130,10 @@ protected: static void logwarns(const char* p1, const char* p2="", const char* p3="", const char* p4=""); static std::string demangle(const char* mangled); + template <typename T> + static std::string classname() { return demangle(typeid(T).name()); } + template <typename T> + static std::string classname(T* ptr) { return demangle(typeid(*ptr).name()); } // Default methods in case subclass doesn't declare them. virtual void initSingleton() {} @@ -178,7 +197,15 @@ struct LLSingleton_manage_master void remove(LLSingletonBase* sb) { sb->remove_master(); } void push_initializing(LLSingletonBase* sb) { sb->push_initializing(typeid(T).name()); } void pop_initializing (LLSingletonBase* sb) { sb->pop_initializing(); } - LLSingletonBase::list_t& get_initializing(T*) { return LLSingletonBase::get_initializing(); } + // used for init stack cleanup in case an LLSingleton subclass constructor + // throws an exception + void reset_initializing(LLSingletonBase::list_t::size_type size) + { + LLSingletonBase::reset_initializing(size); + } + // For any LLSingleton subclass except the MasterList, obtain the init + // stack from the MasterList singleton instance. + LLSingletonBase::list_t& get_initializing() { return LLSingletonBase::get_initializing(); } }; // But for the specific case of LLSingletonBase::MasterList, don't. @@ -189,9 +216,14 @@ struct LLSingleton_manage_master<LLSingletonBase::MasterList> void remove(LLSingletonBase*) {} void push_initializing(LLSingletonBase*) {} void pop_initializing (LLSingletonBase*) {} - LLSingletonBase::list_t& get_initializing(LLSingletonBase::MasterList* instance) + // since we never pushed, no need to clean up + void reset_initializing(LLSingletonBase::list_t::size_type size) {} + LLSingletonBase::list_t& get_initializing() { - return LLSingletonBase::get_initializing_from(instance); + // The MasterList shouldn't depend on any other LLSingletons. We'd + // get into trouble if we tried to recursively engage that machinery. + static LLSingletonBase::list_t sDummyList; + return sDummyList; } }; @@ -201,10 +233,19 @@ LLSingletonBase::LLSingletonBase(tag<DERIVED_TYPE>): mCleaned(false), mDeleteSingleton(NULL) { - // Make this the currently-initializing LLSingleton. + // This is the earliest possible point at which we can push this new + // instance onto the init stack. LLSingleton::constructSingleton() can't + // do it before calling the constructor, because it doesn't have an + // instance pointer until the constructor returns. Fortunately this + // constructor is guaranteed to be called before any subclass constructor. + // Make this new instance the currently-initializing LLSingleton. LLSingleton_manage_master<DERIVED_TYPE>().push_initializing(this); } +// forward declare for friend directive within LLSingleton +template <typename DERIVED_TYPE> +class LLParamSingleton; + /** * LLSingleton implements the getInstance() method part of the Singleton * pattern. It can't make the derived class constructors protected, though, so @@ -270,9 +311,94 @@ template <typename DERIVED_TYPE> class LLSingleton : public LLSingletonBase { private: - static DERIVED_TYPE* constructSingleton() + // Allow LLParamSingleton subclass -- but NOT DERIVED_TYPE itself -- to + // access our private members. + friend class LLParamSingleton<DERIVED_TYPE>; + + // LLSingleton only supports a nullary constructor. However, the specific + // purpose for its subclass LLParamSingleton is to support Singletons + // requiring constructor arguments. constructSingleton() supports both use + // cases. + template <typename... Args> + static void constructSingleton(Args&&... args) { - return new DERIVED_TYPE(); + auto prev_size = LLSingleton_manage_master<DERIVED_TYPE>().get_initializing().size(); + // getInstance() calls are from within constructor + sData.mInitState = CONSTRUCTING; + try + { + sData.mInstance = new DERIVED_TYPE(std::forward<Args>(args)...); + // we have called constructor, have not yet called initSingleton() + sData.mInitState = CONSTRUCTED; + } + catch (const std::exception& err) + { + // LLSingletonBase might -- or might not -- have pushed the new + // instance onto the init stack before the exception. Reset the + // init stack to its previous size BEFORE logging so log-machinery + // LLSingletons don't record a dependency on DERIVED_TYPE! + LLSingleton_manage_master<DERIVED_TYPE>().reset_initializing(prev_size); + logwarns("Error constructing ", classname<DERIVED_TYPE>().c_str(), + ": ", err.what()); + // There isn't a separate EInitState value meaning "we attempted + // to construct this LLSingleton subclass but could not," so use + // DELETED. That seems slightly more appropriate than UNINITIALIZED. + sData.mInitState = DELETED; + // propagate the exception + throw; + } + } + + static void finishInitializing() + { + // getInstance() calls are from within initSingleton() + sData.mInitState = INITIALIZING; + try + { + // initialize singleton after constructing it so that it can + // reference other singletons which in turn depend on it, thus + // breaking cyclic dependencies + sData.mInstance->initSingleton(); + sData.mInitState = INITIALIZED; + + // pop this off stack of initializing singletons + pop_initializing(); + } + catch (const std::exception& err) + { + // pop this off stack of initializing singletons here, too -- + // BEFORE logging, so log-machinery LLSingletons don't record a + // dependency on DERIVED_TYPE! + pop_initializing(); + logwarns("Error in ", classname<DERIVED_TYPE>().c_str(), + "::initSingleton(): ", err.what()); + // and get rid of the instance entirely + deleteSingleton(); + // propagate the exception + throw; + } + } + + static void pop_initializing() + { + // route through LLSingleton_manage_master so we Do The Right Thing + // (namely, nothing) for MasterList + LLSingleton_manage_master<DERIVED_TYPE>().pop_initializing(sData.mInstance); + } + + // Without this 'using' declaration, the static method we're declaring + // here would hide the base-class method we want it to call. + using LLSingletonBase::capture_dependency; + static void capture_dependency() + { + // By this point, if DERIVED_TYPE was pushed onto the initializing + // stack, it has been popped off. So the top of that stack, if any, is + // an LLSingleton that directly depends on DERIVED_TYPE. If + // getInstance() was called by another LLSingleton, rather than from + // vanilla application code, record the dependency. + sData.mInstance->capture_dependency( + LLSingleton_manage_master<DERIVED_TYPE>().get_initializing(), + sData.mInitState); } // We know of no way to instruct the compiler that every subclass @@ -285,34 +411,17 @@ private: // subclass body. virtual void you_must_use_LLSINGLETON_macro() = 0; - // stores pointer to singleton instance - struct SingletonLifetimeManager + // The purpose of this struct is to engage the C++11 guarantee that static + // variables declared in function scope are initialized exactly once, even + // if multiple threads concurrently reach the same declaration. + // https://en.cppreference.com/w/cpp/language/storage_duration#Static_local_variables + // Since getInstance() declares a static instance of SingletonInitializer, + // only the first call to getInstance() calls constructSingleton(). + struct SingletonInitializer { - SingletonLifetimeManager() - { - construct(); - } - - static void construct() - { - sData.mInitState = CONSTRUCTING; - sData.mInstance = constructSingleton(); - sData.mInitState = INITIALIZING; - } - - ~SingletonLifetimeManager() + SingletonInitializer() { - // The dependencies between LLSingletons, and the arbitrary order - // of static-object destruction, mean that we DO NOT WANT this - // destructor to delete this LLSingleton. This destructor will run - // without regard to any other LLSingleton whose cleanup might - // depend on its existence. If you want to clean up LLSingletons, - // call LLSingletonBase::deleteAll() sometime before static-object - // destruction begins. That method will properly honor cross- - // LLSingleton dependencies. Otherwise we simply leak LLSingleton - // instances at shutdown. Since the whole process is terminating - // anyway, that's not necessarily a bad thing; it depends on what - // resources your LLSingleton instances are managing. + constructSingleton(); } }; @@ -363,64 +472,59 @@ public: static void deleteSingleton() { delete sData.mInstance; - sData.mInstance = NULL; - sData.mInitState = DELETED; + // SingletonData state handled by destructor, above } static DERIVED_TYPE* getInstance() { - static SingletonLifetimeManager sLifeTimeMgr; + // call constructSingleton() only the first time we get here + static SingletonInitializer sInitializer; switch (sData.mInitState) { case UNINITIALIZED: // should never be uninitialized at this point logerrs("Uninitialized singleton ", - demangle(typeid(DERIVED_TYPE).name()).c_str()); + classname<DERIVED_TYPE>().c_str()); return NULL; case CONSTRUCTING: + // here if DERIVED_TYPE's constructor (directly or indirectly) + // calls DERIVED_TYPE::getInstance() logerrs("Tried to access singleton ", - demangle(typeid(DERIVED_TYPE).name()).c_str(), + classname<DERIVED_TYPE>().c_str(), " from singleton constructor!"); return NULL; - case INITIALIZING: - // go ahead and flag ourselves as initialized so we can be - // reentrant during initialization - sData.mInitState = INITIALIZED; - // initialize singleton after constructing it so that it can - // reference other singletons which in turn depend on it, thus - // breaking cyclic dependencies - sData.mInstance->initSingleton(); - // pop this off stack of initializing singletons - LLSingleton_manage_master<DERIVED_TYPE>().pop_initializing(sData.mInstance); + case CONSTRUCTED: + // first time through: set to CONSTRUCTED by + // constructSingleton(), called by sInitializer's constructor; + // still have to call initSingleton() + finishInitializing(); break; + case INITIALIZING: + // here if DERIVED_TYPE::initSingleton() (directly or indirectly) + // calls DERIVED_TYPE::getInstance(): go ahead and allow it case INITIALIZED: + // normal subsequent calls break; case DELETED: + // called after deleteSingleton() logwarns("Trying to access deleted singleton ", - demangle(typeid(DERIVED_TYPE).name()).c_str(), + classname<DERIVED_TYPE>().c_str(), " -- creating new instance"); - SingletonLifetimeManager::construct(); - // same as first time construction - sData.mInitState = INITIALIZED; - sData.mInstance->initSingleton(); - // pop this off stack of initializing singletons - LLSingleton_manage_master<DERIVED_TYPE>().pop_initializing(sData.mInstance); + // This recovery sequence is NOT thread-safe! We would need a + // recursive_mutex a la LLParamSingleton. + constructSingleton(); + finishInitializing(); break; } - // By this point, if DERIVED_TYPE was pushed onto the initializing - // stack, it has been popped off. So the top of that stack, if any, is - // an LLSingleton that directly depends on DERIVED_TYPE. If this call - // came from another LLSingleton, rather than from vanilla application - // code, record the dependency. - sData.mInstance->capture_dependency( - LLSingleton_manage_master<DERIVED_TYPE>().get_initializing(sData.mInstance), - sData.mInitState); + // record the dependency, if any: check if we got here from another + // LLSingleton's constructor or initSingleton() method + capture_dependency(); return sData.mInstance; } @@ -460,6 +564,173 @@ private: template<typename T> typename LLSingleton<T>::SingletonData LLSingleton<T>::sData; + +/** + * LLParamSingleton<T> is like LLSingleton<T>, except in the following ways: + * + * * It is NOT instantiated on demand (instance() or getInstance()). You must + * first call initParamSingleton(constructor args...). + * * Before initParamSingleton(), calling instance() or getInstance() dies with + * LL_ERRS. + * * initParamSingleton() may be called only once. A second call dies with + * LL_ERRS. + * * However, distinct initParamSingleton() calls can be used to engage + * different constructors, as long as only one such call is executed at + * runtime. + * * Unlike LLSingleton, an LLParamSingleton cannot be "revived" by an + * instance() or getInstance() call after deleteSingleton(). + * + * Importantly, though, each LLParamSingleton subclass does participate in the + * dependency-ordered LLSingletonBase::deleteAll() processing. + */ +template <typename DERIVED_TYPE> +class LLParamSingleton : public LLSingleton<DERIVED_TYPE> +{ +private: + typedef LLSingleton<DERIVED_TYPE> super; + // Use a recursive_mutex in case of constructor circularity. With a + // non-recursive mutex, that would result in deadlock rather than the + // logerrs() call in getInstance(). + typedef std::recursive_mutex mutex_t; + +public: + using super::deleteSingleton; + using super::instanceExists; + using super::wasDeleted; + + // Passes arguments to DERIVED_TYPE's constructor and sets appropriate states + template <typename... Args> + static void initParamSingleton(Args&&... args) + { + // In case racing threads both call initParamSingleton() at the same + // time, serialize them. One should initialize; the other should see + // mInitState already set. + std::unique_lock<mutex_t> lk(getMutex()); + // For organizational purposes this function shouldn't be called twice + if (super::sData.mInitState != super::UNINITIALIZED) + { + super::logerrs("Tried to initialize singleton ", + super::template classname<DERIVED_TYPE>().c_str(), + " twice!"); + } + else + { + super::constructSingleton(std::forward<Args>(args)...); + super::finishInitializing(); + } + } + + static DERIVED_TYPE* getInstance() + { + // In case racing threads call getInstance() at the same moment as + // initParamSingleton(), serialize the calls. + std::unique_lock<mutex_t> lk(getMutex()); + + switch (super::sData.mInitState) + { + case super::UNINITIALIZED: + super::logerrs("Uninitialized param singleton ", + super::template classname<DERIVED_TYPE>().c_str()); + break; + + case super::CONSTRUCTING: + super::logerrs("Tried to access param singleton ", + super::template classname<DERIVED_TYPE>().c_str(), + " from singleton constructor!"); + break; + + case super::CONSTRUCTED: + // Should never happen!? The CONSTRUCTED state is specifically to + // navigate through LLSingleton::SingletonInitializer getting + // constructed (once) before LLSingleton::getInstance()'s switch + // on mInitState. But our initParamSingleton() method calls + // constructSingleton() and then calls finishInitializing(), which + // immediately sets INITIALIZING. Why are we here? + super::logerrs("Param singleton ", + super::template classname<DERIVED_TYPE>().c_str(), + "::initSingleton() not yet called"); + break; + + case super::INITIALIZING: + // As with LLSingleton, explicitly permit circular calls from + // within initSingleton() + case super::INITIALIZED: + // for any valid call, capture dependencies + super::capture_dependency(); + return super::sData.mInstance; + + case super::DELETED: + super::logerrs("Trying to access deleted param singleton ", + super::template classname<DERIVED_TYPE>().c_str()); + break; + } + + // should never actually get here; this is to pacify the compiler, + // which assumes control might return from logerrs() + return nullptr; + } + + // instance() is replicated here so it calls + // LLParamSingleton::getInstance() rather than LLSingleton::getInstance() + // -- avoid making getInstance() virtual + static DERIVED_TYPE& instance() + { + return *getInstance(); + } + +private: + // sMutex must be a function-local static rather than a static member. One + // of the essential features of LLSingleton and friends is that they must + // support getInstance() even when the containing module's static + // variables have not yet been runtime-initialized. A mutex requires + // construction. A static class member might not yet have been + // constructed. + // + // We could store a dumb mutex_t*, notice when it's NULL and allocate a + // heap mutex -- but that's vulnerable to race conditions. And we can't + // defend the dumb pointer with another mutex. + // + // We could store a std::atomic<mutex_t*> -- but a default-constructed + // std::atomic<T> does not contain a valid T, even a default-constructed + // T! Which means std::atomic, too, requires runtime initialization. + // + // But a function-local static is guaranteed to be initialized exactly + // once, the first time control reaches that declaration. + static mutex_t& getMutex() + { + static mutex_t sMutex; + return sMutex; + } +}; + +/** + * Initialization locked singleton, only derived class can decide when to initialize. + * Starts locked. + * For cases when singleton has a dependency onto something or. + * + * LLLockedSingleton is like an LLParamSingleton with a nullary constructor. + * It cannot be instantiated on demand (instance() or getInstance() call) -- + * it must be instantiated by calling construct(). However, it does + * participate in dependency-ordered LLSingletonBase::deleteAll() processing. + */ +template <typename DT> +class LLLockedSingleton : public LLParamSingleton<DT> +{ + typedef LLParamSingleton<DT> super; + +public: + using super::deleteSingleton; + using super::getInstance; + using super::instance; + using super::instanceExists; + using super::wasDeleted; + + static void construct() + { + super::initParamSingleton(); + } +}; + /** * Use LLSINGLETON(Foo); at the start of an LLSingleton<Foo> subclass body * when you want to declare an out-of-line constructor: @@ -484,13 +755,13 @@ typename LLSingleton<T>::SingletonData LLSingleton<T>::sData; * file, use 'inline' (unless it's a template class) to avoid duplicate-symbol * errors at link time. */ -#define LLSINGLETON(DERIVED_CLASS) \ +#define LLSINGLETON(DERIVED_CLASS, ...) \ private: \ /* implement LLSingleton pure virtual method whose sole purpose */ \ /* is to remind people to use this macro */ \ virtual void you_must_use_LLSINGLETON_macro() {} \ friend class LLSingleton<DERIVED_CLASS>; \ - DERIVED_CLASS() + DERIVED_CLASS(__VA_ARGS__) /** * A slight variance from the above, but includes the "override" keyword diff --git a/indra/llcommon/tests/lleventcoro_test.cpp b/indra/llcommon/tests/lleventcoro_test.cpp index a459d17fb8..fa02d2bb1a 100644 --- a/indra/llcommon/tests/lleventcoro_test.cpp +++ b/indra/llcommon/tests/lleventcoro_test.cpp @@ -506,16 +506,10 @@ namespace tut replyName = waiter.getName0(); errorName = waiter.getName1(); WrapLLErrs capture; - try - { - result = waiter.suspendWithLog(); - debug("no exception"); - } - catch (const WrapLLErrs::FatalException& e) - { - debug(STRINGIZE("exception " << e.what())); - threw = e.what(); - } + threw = capture.catch_llerrs([&waiter, &debug](){ + result = waiter.suspendWithLog(); + debug("no exception"); + }); } END } @@ -762,18 +756,13 @@ namespace tut { LLCoroEventPumps waiter; WrapLLErrs capture; - try - { - result = waiter.postAndSuspendWithLog( - LLSDMap("value", 31)("fail", LLSD()), - immediateAPI.getPump(), "reply", "error"); - debug("no exception"); - } - catch (const WrapLLErrs::FatalException& e) - { - debug(STRINGIZE("exception " << e.what())); - threw = e.what(); - } + threw = capture.catch_llerrs( + [&waiter, &debug](){ + result = waiter.postAndSuspendWithLog( + LLSDMap("value", 31)("fail", LLSD()), + immediateAPI.getPump(), "reply", "error"); + debug("no exception"); + }); } END } diff --git a/indra/llcommon/tests/lleventdispatcher_test.cpp b/indra/llcommon/tests/lleventdispatcher_test.cpp index 5a4df81bf1..a181d5c941 100644 --- a/indra/llcommon/tests/lleventdispatcher_test.cpp +++ b/indra/llcommon/tests/lleventdispatcher_test.cpp @@ -22,6 +22,7 @@ #include "llsdutil.h" #include "stringize.h" #include "tests/wrapllerrs.h" +#include "../test/catch_and_store_what_in.h" #include <map> #include <string> @@ -630,16 +631,9 @@ namespace tut void call_exc(const std::string& func, const LLSD& args, const std::string& exc_frag) { - std::string threw; - try - { - work(func, args); - } - catch (const std::runtime_error& e) - { - cout << "*** " << e.what() << '\n'; - threw = e.what(); - } + std::string threw = catch_what<std::runtime_error>([this, &func, &args](){ + work(func, args); + }); ensure_has(threw, exc_frag); } @@ -717,15 +711,9 @@ namespace tut LLSD attempts(LLSDArray(17)(LLSDMap("pi", 3.14)("two", 2))); foreach(LLSD ae, inArray(attempts)) { - std::string threw; - try - { - work.add("freena_err", "freena", freena, ae); - } - catch (const std::exception& e) - { - threw = e.what(); - } + std::string threw = catch_what<std::exception>([this, &ae](){ + work.add("freena_err", "freena", freena, ae); + }); ensure_has(threw, "must be an array"); } } @@ -734,15 +722,9 @@ namespace tut void object::test<2>() { set_test_name("map-style registration with badly-formed defaults"); - std::string threw; - try - { - work.add("freena_err", "freena", freena, LLSDArray("a")("b"), 17); - } - catch (const std::exception& e) - { - threw = e.what(); - } + std::string threw = catch_what<std::exception>([this](){ + work.add("freena_err", "freena", freena, LLSDArray("a")("b"), 17); + }); ensure_has(threw, "must be a map or an array"); } @@ -750,17 +732,11 @@ namespace tut void object::test<3>() { set_test_name("map-style registration with too many array defaults"); - std::string threw; - try - { - work.add("freena_err", "freena", freena, - LLSDArray("a")("b"), - LLSDArray(17)(0.9)("gack")); - } - catch (const std::exception& e) - { - threw = e.what(); - } + std::string threw = catch_what<std::exception>([this](){ + work.add("freena_err", "freena", freena, + LLSDArray("a")("b"), + LLSDArray(17)(0.9)("gack")); + }); ensure_has(threw, "shorter than"); } @@ -768,17 +744,11 @@ namespace tut void object::test<4>() { set_test_name("map-style registration with too many map defaults"); - std::string threw; - try - { - work.add("freena_err", "freena", freena, - LLSDArray("a")("b"), - LLSDMap("b", 17)("foo", 3.14)("bar", "sinister")); - } - catch (const std::exception& e) - { - threw = e.what(); - } + std::string threw = catch_what<std::exception>([this](){ + work.add("freena_err", "freena", freena, + LLSDArray("a")("b"), + LLSDMap("b", 17)("foo", 3.14)("bar", "sinister")); + }); ensure_has(threw, "nonexistent params"); ensure_has(threw, "foo"); ensure_has(threw, "bar"); @@ -1039,16 +1009,9 @@ namespace tut // We don't have a comparable helper function for the one-arg // operator() method, and it's not worth building one just for this // case. Write it out. - std::string threw; - try - { - work(LLSDMap("op", "freek")); - } - catch (const std::runtime_error& e) - { - cout << "*** " << e.what() << "\n"; - threw = e.what(); - } + std::string threw = catch_what<std::runtime_error>([this](){ + work(LLSDMap("op", "freek")); + }); ensure_has(threw, "bad"); ensure_has(threw, "op"); ensure_has(threw, "freek"); diff --git a/indra/llcommon/tests/lleventfilter_test.cpp b/indra/llcommon/tests/lleventfilter_test.cpp index eb98b12ef5..1875013794 100644 --- a/indra/llcommon/tests/lleventfilter_test.cpp +++ b/indra/llcommon/tests/lleventfilter_test.cpp @@ -350,15 +350,9 @@ namespace tut // Now let the timer expire. filter.forceTimeout(); // Notice the timeout. - std::string threw; - try - { - mainloop.post(17); - } - catch (const WrapLLErrs::FatalException& e) - { - threw = e.what(); - } + std::string threw = capture.catch_llerrs([this](){ + mainloop.post(17); + }); ensure_contains("errorAfter() timeout exception", threw, "timeout"); // Timing out cancels the timer. Verify that. listener0.reset(0); diff --git a/indra/llcommon/tests/llinstancetracker_test.cpp b/indra/llcommon/tests/llinstancetracker_test.cpp index c7d4b8a06b..d94fc0c56d 100644 --- a/indra/llcommon/tests/llinstancetracker_test.cpp +++ b/indra/llcommon/tests/llinstancetracker_test.cpp @@ -198,14 +198,9 @@ namespace tut { WrapLLErrs wrapper; Keyed::instance_iter i(Keyed::beginInstances()); - try - { - delete keyed; - } - catch (const WrapLLErrs::FatalException& e) - { - what = e.what(); - } + what = wrapper.catch_llerrs([&keyed](){ + delete keyed; + }); } ensure(! what.empty()); } @@ -219,14 +214,9 @@ namespace tut { WrapLLErrs wrapper; Keyed::key_iter i(Keyed::beginKeys()); - try - { - delete keyed; - } - catch (const WrapLLErrs::FatalException& e) - { - what = e.what(); - } + what = wrapper.catch_llerrs([&keyed](){ + delete keyed; + }); } ensure(! what.empty()); } @@ -240,14 +230,9 @@ namespace tut { WrapLLErrs wrapper; Unkeyed::instance_iter i(Unkeyed::beginInstances()); - try - { - delete unkeyed; - } - catch (const WrapLLErrs::FatalException& e) - { - what = e.what(); - } + what = wrapper.catch_llerrs([&unkeyed](){ + delete unkeyed; + }); } ensure(! what.empty()); } diff --git a/indra/llcommon/tests/lllazy_test.cpp b/indra/llcommon/tests/lllazy_test.cpp index 32a717f4fc..542306ee22 100644 --- a/indra/llcommon/tests/lllazy_test.cpp +++ b/indra/llcommon/tests/lllazy_test.cpp @@ -38,6 +38,7 @@ #include <boost/lambda/bind.hpp> // other Linden headers #include "../test/lltut.h" +#include "../test/catch_and_store_what_in.h" namespace bll = boost::lambda; @@ -200,15 +201,9 @@ namespace tut void lllazy_object::test<2>() { TestNeedsTesting tnt; - std::string threw; - try - { - tnt.toolate(); - } - catch (const LLLazyCommon::InstanceChange& e) - { - threw = e.what(); - } + std::string threw = catch_what<LLLazyCommon::InstanceChange>([&tnt](){ + tnt.toolate(); + }); ensure_contains("InstanceChange exception", threw, "replace LLLazy instance"); } diff --git a/indra/llcommon/tests/llleap_test.cpp b/indra/llcommon/tests/llleap_test.cpp index 45648536c4..bf0a74d10d 100644 --- a/indra/llcommon/tests/llleap_test.cpp +++ b/indra/llcommon/tests/llleap_test.cpp @@ -23,7 +23,7 @@ #include "../test/lltut.h" #include "../test/namedtempfile.h" #include "../test/catch_and_store_what_in.h" -#include "wrapllerrs.h" +#include "wrapllerrs.h" // CaptureLog #include "llevents.h" #include "llprocess.h" #include "llstring.h" @@ -290,12 +290,9 @@ namespace tut void object::test<6>() { set_test_name("empty plugin vector"); - std::string threw; - try - { - LLLeap::create("empty", StringVec()); - } - CATCH_AND_STORE_WHAT_IN(threw, LLLeap::Error) + std::string threw = catch_what<LLLeap::Error>([](){ + LLLeap::create("empty", StringVec()); + }); ensure_contains("LLLeap::Error", threw, "no plugin"); // try the suppress-exception variant ensure("bad launch returned non-NULL", ! LLLeap::create("empty", StringVec(), false)); @@ -308,12 +305,9 @@ namespace tut // Synthesize bogus executable name std::string BADPYTHON(PYTHON.substr(0, PYTHON.length()-1) + "x"); CaptureLog log; - std::string threw; - try - { - LLLeap::create("bad exe", BADPYTHON); - } - CATCH_AND_STORE_WHAT_IN(threw, LLLeap::Error) + std::string threw = catch_what<LLLeap::Error>([&BADPYTHON](){ + LLLeap::create("bad exe", BADPYTHON); + }); ensure_contains("LLLeap::create() didn't throw", threw, "failed"); log.messageWith("failed"); log.messageWith(BADPYTHON); diff --git a/indra/llcommon/tests/llprocess_test.cpp b/indra/llcommon/tests/llprocess_test.cpp index 5c87cdabd9..222d832084 100644 --- a/indra/llcommon/tests/llprocess_test.cpp +++ b/indra/llcommon/tests/llprocess_test.cpp @@ -25,8 +25,6 @@ #include <boost/function.hpp> #include <boost/algorithm/string/find_iterator.hpp> #include <boost/algorithm/string/finder.hpp> -//#include <boost/lambda/lambda.hpp> -//#include <boost/lambda/bind.hpp> // other Linden headers #include "../test/lltut.h" #include "../test/namedtempfile.h" @@ -35,7 +33,7 @@ #include "llsdutil.h" #include "llevents.h" #include "llstring.h" -#include "wrapllerrs.h" +#include "wrapllerrs.h" // CaptureLog #if defined(LL_WINDOWS) #define sleep(secs) _sleep((secs) * 1000) @@ -45,8 +43,7 @@ #include <sys/wait.h> #endif -//namespace lambda = boost::lambda; - std::string apr_strerror_helper(apr_status_t rv) +std::string apr_strerror_helper(apr_status_t rv) { char errbuf[256]; apr_strerror(rv, errbuf, sizeof(errbuf)); @@ -960,12 +957,9 @@ namespace tut #define CATCH_IN(THREW, EXCEPTION, CODE) \ do \ { \ - (THREW).clear(); \ - try \ - { \ - CODE; \ - } \ - CATCH_AND_STORE_WHAT_IN(THREW, EXCEPTION) \ + (THREW) = catch_what<EXCEPTION>([&](){ \ + CODE; \ + }); \ ensure("failed to throw " #EXCEPTION ": " #CODE, ! (THREW).empty()); \ } while (0) diff --git a/indra/llcommon/tests/llsingleton_test.cpp b/indra/llcommon/tests/llsingleton_test.cpp index 56886bc73f..75ddff9d7d 100644 --- a/indra/llcommon/tests/llsingleton_test.cpp +++ b/indra/llcommon/tests/llsingleton_test.cpp @@ -29,7 +29,8 @@ #include "llsingleton.h" #include "../test/lltut.h" - +#include "wrapllerrs.h" +#include "llsd.h" // Capture execution sequence by appending to log string. std::string sLog; @@ -198,4 +199,134 @@ namespace tut TESTS(A, B, 4, 5, 6, 7) TESTS(B, A, 8, 9, 10, 11) + +#define PARAMSINGLETON(cls) \ + class cls: public LLParamSingleton<cls> \ + { \ + LLSINGLETON(cls, const LLSD::String& str): mDesc(str) {} \ + cls(LLSD::Integer i): mDesc(i) {} \ + \ + public: \ + std::string desc() const { return mDesc.asString(); } \ + \ + private: \ + LLSD mDesc; \ + } + + // Declare two otherwise-identical LLParamSingleton classes so we can + // validly initialize each using two different constructors. If we tried + // to test that with a single LLParamSingleton class within the same test + // program, we'd get 'trying to use deleted LLParamSingleton' errors. + PARAMSINGLETON(PSing1); + PARAMSINGLETON(PSing2); + + template<> template<> + void singleton_object_t::test<12>() + { + set_test_name("LLParamSingleton"); + + WrapLLErrs catcherr; + // query methods + ensure("false positive on instanceExists()", ! PSing1::instanceExists()); + ensure("false positive on wasDeleted()", ! PSing1::wasDeleted()); + // try to reference before initializing + std::string threw = catcherr.catch_llerrs([](){ + (void)PSing1::instance(); + }); + ensure_contains("too-early instance() didn't throw", threw, "Uninitialized"); + // getInstance() behaves the same as instance() + threw = catcherr.catch_llerrs([](){ + (void)PSing1::getInstance(); + }); + ensure_contains("too-early getInstance() didn't throw", threw, "Uninitialized"); + // initialize using LLSD::String constructor + PSing1::initParamSingleton("string"); + ensure_equals(PSing1::instance().desc(), "string"); + ensure("false negative on instanceExists()", PSing1::instanceExists()); + // try to initialize again + threw = catcherr.catch_llerrs([](){ + PSing1::initParamSingleton("again"); + }); + ensure_contains("second ctor(string) didn't throw", threw, "twice"); + // try to initialize using the other constructor -- should be + // well-formed, but illegal at runtime + threw = catcherr.catch_llerrs([](){ + PSing1::initParamSingleton(17); + }); + ensure_contains("other ctor(int) didn't throw", threw, "twice"); + PSing1::deleteSingleton(); + ensure("false negative on wasDeleted()", PSing1::wasDeleted()); + threw = catcherr.catch_llerrs([](){ + (void)PSing1::instance(); + }); + ensure_contains("accessed deleted LLParamSingleton", threw, "deleted"); + } + + template<> template<> + void singleton_object_t::test<13>() + { + set_test_name("LLParamSingleton alternate ctor"); + + WrapLLErrs catcherr; + // We don't have to restate all the tests for PSing1. Only test validly + // using the other constructor. + PSing2::initParamSingleton(17); + ensure_equals(PSing2::instance().desc(), "17"); + // can't do it twice + std::string threw = catcherr.catch_llerrs([](){ + PSing2::initParamSingleton(34); + }); + ensure_contains("second ctor(int) didn't throw", threw, "twice"); + // can't use the other constructor either + threw = catcherr.catch_llerrs([](){ + PSing2::initParamSingleton("string"); + }); + ensure_contains("other ctor(string) didn't throw", threw, "twice"); + } + + class CircularPCtor: public LLParamSingleton<CircularPCtor> + { + LLSINGLETON(CircularPCtor) + { + // never mind indirection, just go straight for the circularity + (void)instance(); + } + }; + + template<> template<> + void singleton_object_t::test<14>() + { + set_test_name("Circular LLParamSingleton constructor"); + WrapLLErrs catcherr; + std::string threw = catcherr.catch_llerrs([](){ + CircularPCtor::initParamSingleton(); + }); + ensure_contains("constructor circularity didn't throw", threw, "constructor"); + } + + class CircularPInit: public LLParamSingleton<CircularPInit> + { + LLSINGLETON_EMPTY_CTOR(CircularPInit); + public: + virtual void initSingleton() + { + // never mind indirection, just go straight for the circularity + CircularPInit *pt = getInstance(); + if (!pt) + { + throw; + } + } + }; + + template<> template<> + void singleton_object_t::test<15>() + { + set_test_name("Circular LLParamSingleton initSingleton()"); + WrapLLErrs catcherr; + std::string threw = catcherr.catch_llerrs([](){ + CircularPInit::initParamSingleton(); + }); + ensure("initSingleton() circularity threw", threw.empty()); + } } diff --git a/indra/llcommon/tests/wrapllerrs.h b/indra/llcommon/tests/wrapllerrs.h index 08fbf19b1c..b07d5afbd8 100644 --- a/indra/llcommon/tests/wrapllerrs.h +++ b/indra/llcommon/tests/wrapllerrs.h @@ -37,6 +37,7 @@ #include "llerrorcontrol.h" #include "llexception.h" #include "stringize.h" +#include "../test/catch_and_store_what_in.h" #include <boost/bind.hpp> #include <boost/noncopyable.hpp> #include <boost/shared_ptr.hpp> @@ -81,6 +82,31 @@ struct WrapLLErrs LLTHROW(FatalException(message)); } + /// Convenience wrapper for catch_what<FatalException>() + // + // The implementation makes it clear that this function need not be a + // member; it could easily be a free function. It is a member because it + // makes no sense to attempt to catch FatalException unless there is a + // WrapLLErrs instance in scope. Without a live WrapLLErrs instance, any + // LL_ERRS() reached by code within 'func' would terminate the test + // program instead of throwing FatalException. + // + // We were tempted to introduce a free function, likewise accepting + // arbitrary 'func', that would instantiate WrapLLErrs and then call + // catch_llerrs() on that instance. We decided against it, for this + // reason: on extending a test function containing a single call to that + // free function, a maintainer would most likely make additional calls to + // that free function, instead of switching to an explicit WrapLLErrs + // declaration with several calls to its catch_llerrs() member function. + // Even a construct such as WrapLLErrs().catch_llerrs(...) would make the + // object declaration more visible; it's not unreasonable to expect a + // maintainer to extend that by naming and reusing the WrapLLErrs instance. + template <typename FUNC> + std::string catch_llerrs(FUNC func) + { + return catch_what<FatalException>(func); + } + std::string error; LLError::SettingsStoragePtr mPriorErrorSettings; LLError::FatalFunction mPriorFatal; |