diff options
author | Steven Bennetts <steve@lindenlab.com> | 2009-06-21 08:04:56 +0000 |
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committer | Steven Bennetts <steve@lindenlab.com> | 2009-06-21 08:04:56 +0000 |
commit | 9ec432034dc3c45d7ce763eb02dae4cc7f6b8da8 (patch) | |
tree | 4a505c1e0919af52800b3ffb3eaf135e7d6f9ce6 /indra/llcommon/llmemory.h | |
parent | 351ebe9fcb76f3b99c2957004bb8493a904869ee (diff) |
merge -r 122421-124917 viewer-2.0.0-2 -> viewer-2.0.0-3
ignore-dead-branch
Diffstat (limited to 'indra/llcommon/llmemory.h')
-rw-r--r-- | indra/llcommon/llmemory.h | 429 |
1 files changed, 11 insertions, 418 deletions
diff --git a/indra/llcommon/llmemory.h b/indra/llcommon/llmemory.h index b5c0711484..f41da37ba6 100644 --- a/indra/llcommon/llmemory.h +++ b/indra/llcommon/llmemory.h @@ -29,21 +29,17 @@ * COMPLETENESS OR PERFORMANCE. * $/LicenseInfo$ */ -#ifndef LL_MEMORY_H -#define LL_MEMORY_H +#ifndef LLMEMORY_H +#define LLMEMORY_H -#include <new> -#include <cstdlib> -#include "llerror.h" extern S32 gTotalDAlloc; extern S32 gTotalDAUse; extern S32 gDACount; -const U32 LLREFCOUNT_SENTINEL_VALUE = 0xAAAAAAAA; - -//---------------------------------------------------------------------------- +extern void* ll_allocate (size_t size); +extern void ll_release (void *p); class LLMemory { @@ -51,422 +47,19 @@ public: static void initClass(); static void cleanupClass(); static void freeReserve(); + // Return the resident set size of the current process, in bytes. + // Return value is zero if not known. + static U64 getCurrentRSS(); private: static char* reserveMem; }; -//---------------------------------------------------------------------------- -// RefCount objects should generally only be accessed by way of LLPointer<>'s -// NOTE: LLPointer<LLFoo> x = new LLFoo(); MAY NOT BE THREAD SAFE -// if LLFoo::LLFoo() does anything like put itself in an update queue. -// The queue may get accessed before it gets assigned to x. -// The correct implementation is: -// LLPointer<LLFoo> x = new LLFoo; // constructor does not do anything interesting -// x->instantiate(); // does stuff like place x into an update queue - -// see llthread.h for LLThreadSafeRefCount - -//---------------------------------------------------------------------------- - -class LLRefCount -{ -protected: - LLRefCount(const LLRefCount&); // not implemented -private: - LLRefCount&operator=(const LLRefCount&); // not implemented - -protected: - virtual ~LLRefCount(); // use unref() - -public: - LLRefCount(); - - void ref() - { - mRef++; - } - - S32 unref() - { - llassert(mRef >= 1); - if (0 == --mRef) - { - delete this; - return 0; - } - return mRef; - } - - S32 getNumRefs() const - { - return mRef; - } - -private: - S32 mRef; -}; - -//---------------------------------------------------------------------------- - -// Note: relies on Type having ref() and unref() methods -template <class Type> class LLPointer -{ -public: - - LLPointer() : - mPointer(NULL) - { - } - - LLPointer(Type* ptr) : - mPointer(ptr) - { - ref(); - } - - LLPointer(const LLPointer<Type>& ptr) : - mPointer(ptr.mPointer) - { - ref(); - } - - // support conversion up the type hierarchy. See Item 45 in Effective C++, 3rd Ed. - template<typename Subclass> - LLPointer(const LLPointer<Subclass>& ptr) : - mPointer(ptr.get()) - { - ref(); - } - - ~LLPointer() - { - unref(); - } - - Type* get() const { return mPointer; } - const Type* operator->() const { return mPointer; } - Type* operator->() { return mPointer; } - const Type& operator*() const { return *mPointer; } - Type& operator*() { return *mPointer; } - - operator BOOL() const { return (mPointer != NULL); } - operator bool() const { return (mPointer != NULL); } - bool operator!() const { return (mPointer == NULL); } - bool isNull() const { return (mPointer == NULL); } - bool notNull() const { return (mPointer != NULL); } - - operator Type*() const { return mPointer; } - operator const Type*() const { return mPointer; } - bool operator !=(Type* ptr) const { return (mPointer != ptr); } - bool operator ==(Type* ptr) const { return (mPointer == ptr); } - bool operator ==(const LLPointer<Type>& ptr) const { return (mPointer == ptr.mPointer); } - bool operator < (const LLPointer<Type>& ptr) const { return (mPointer < ptr.mPointer); } - bool operator > (const LLPointer<Type>& ptr) const { return (mPointer > ptr.mPointer); } - - LLPointer<Type>& operator =(Type* ptr) - { - if( mPointer != ptr ) - { - unref(); - mPointer = ptr; - ref(); - } - - return *this; - } - - LLPointer<Type>& operator =(const LLPointer<Type>& ptr) - { - if( mPointer != ptr.mPointer ) - { - unref(); - mPointer = ptr.mPointer; - ref(); - } - return *this; - } - - // support assignment up the type hierarchy. See Item 45 in Effective C++, 3rd Ed. - template<typename Subclass> - LLPointer<Type>& operator =(const LLPointer<Subclass>& ptr) - { - if( mPointer != ptr.get() ) - { - unref(); - mPointer = ptr.get(); - ref(); - } - return *this; - } - - // Just exchange the pointers, which will not change the reference counts. - static void swap(LLPointer<Type>& a, LLPointer<Type>& b) - { - Type* temp = a.mPointer; - a.mPointer = b.mPointer; - b.mPointer = temp; - } - -protected: - void ref() - { - if (mPointer) - { - mPointer->ref(); - } - } - - void unref() - { - if (mPointer) - { - Type *tempp = mPointer; - mPointer = NULL; - tempp->unref(); - if (mPointer != NULL) - { - llwarns << "Unreference did assignment to non-NULL because of destructor" << llendl; - unref(); - } - } - } - -protected: - Type* mPointer; -}; - -//template <class Type> -//class LLPointerTraits -//{ -// static Type* null(); -//}; -// -// Expands LLPointer to return a pointer to a special instance of class Type instead of NULL. -// This is useful in instances where operations on NULL pointers are semantically safe and/or -// when error checking occurs at a different granularity or in a different part of the code -// than when referencing an object via a LLSafeHandle. -// - -template <class Type> -class LLSafeHandle -{ -public: - LLSafeHandle() : - mPointer(NULL) - { - } - - LLSafeHandle(Type* ptr) : - mPointer(NULL) - { - assign(ptr); - } - - LLSafeHandle(const LLSafeHandle<Type>& ptr) : - mPointer(NULL) - { - assign(ptr.mPointer); - } - - // support conversion up the type hierarchy. See Item 45 in Effective C++, 3rd Ed. - template<typename Subclass> - LLSafeHandle(const LLSafeHandle<Subclass>& ptr) : - mPointer(NULL) - { - assign(ptr.get()); - } - - ~LLSafeHandle() - { - unref(); - } - - const Type* operator->() const { return nonNull(mPointer); } - Type* operator->() { return nonNull(mPointer); } - - Type* get() const { return mPointer; } - // we disallow these operations as they expose our null objects to direct manipulation - // and bypass the reference counting semantics - //const Type& operator*() const { return *nonNull(mPointer); } - //Type& operator*() { return *nonNull(mPointer); } - - operator BOOL() const { return mPointer != NULL; } - operator bool() const { return mPointer != NULL; } - bool operator!() const { return mPointer == NULL; } - bool isNull() const { return mPointer == NULL; } - bool notNull() const { return mPointer != NULL; } - - - operator Type*() const { return mPointer; } - operator const Type*() const { return mPointer; } - bool operator !=(Type* ptr) const { return (mPointer != ptr); } - bool operator ==(Type* ptr) const { return (mPointer == ptr); } - bool operator ==(const LLSafeHandle<Type>& ptr) const { return (mPointer == ptr.mPointer); } - bool operator < (const LLSafeHandle<Type>& ptr) const { return (mPointer < ptr.mPointer); } - bool operator > (const LLSafeHandle<Type>& ptr) const { return (mPointer > ptr.mPointer); } - - LLSafeHandle<Type>& operator =(Type* ptr) - { - assign(ptr); - return *this; - } - - LLSafeHandle<Type>& operator =(const LLSafeHandle<Type>& ptr) - { - assign(ptr.mPointer); - return *this; - } - - // support assignment up the type hierarchy. See Item 45 in Effective C++, 3rd Ed. - template<typename Subclass> - LLSafeHandle<Type>& operator =(const LLSafeHandle<Subclass>& ptr) - { - assign(ptr.get()); - return *this; - } - -public: - typedef Type* (*NullFunc)(); - static const NullFunc sNullFunc; - -protected: - void ref() - { - if (mPointer) - { - mPointer->ref(); - } - } - - void unref() - { - if (mPointer) - { - Type *tempp = mPointer; - mPointer = NULL; - tempp->unref(); - if (mPointer != NULL) - { - llwarns << "Unreference did assignment to non-NULL because of destructor" << llendl; - unref(); - } - } - } - - void assign(Type* ptr) - { - if( mPointer != ptr ) - { - unref(); - mPointer = ptr; - ref(); - } - } - - static Type* nonNull(Type* ptr) - { - return ptr == NULL ? sNullFunc() : ptr; - } - -protected: - Type* mPointer; -}; - -// LLInitializedPointer is just a pointer with a default constructor that initializes it to NULL -// NOT a smart pointer like LLPointer<> -// Useful for example in std::map<int,LLInitializedPointer<LLFoo> > -// (std::map uses the default constructor for creating new entries) -template <typename T> class LLInitializedPointer -{ -public: - LLInitializedPointer() : mPointer(NULL) {} - ~LLInitializedPointer() { delete mPointer; } - - const T* operator->() const { return mPointer; } - T* operator->() { return mPointer; } - const T& operator*() const { return *mPointer; } - T& operator*() { return *mPointer; } - operator const T*() const { return mPointer; } - operator T*() { return mPointer; } - T* operator=(T* x) { return (mPointer = x); } - operator bool() const { return mPointer != NULL; } - bool operator!() const { return mPointer == NULL; } - bool operator==(T* rhs) { return mPointer == rhs; } - bool operator==(const LLInitializedPointer<T>* rhs) { return mPointer == rhs.mPointer; } - -protected: - T* mPointer; -}; - -//---------------------------------------------------------------------------- +// LLRefCount moved to llrefcount.h -// LLSingleton implements the getInstance() method part of the Singleton -// pattern. It can't make the derived class constructors protected, though, so -// you have to do that yourself. -// -// There are two ways to use LLSingleton. The first way is to inherit from it -// while using the typename that you'd like to be static as the template -// parameter, like so: -// -// class Foo: public LLSingleton<Foo>{}; -// -// Foo& instance = Foo::instance(); -// -// The second way is to use the singleton class directly, without inheritance: -// -// typedef LLSingleton<Foo> FooSingleton; -// -// Foo& instance = FooSingleton::instance(); -// -// In this case, the class being managed as a singleton needs to provide an -// initSingleton() method since the LLSingleton virtual method won't be -// available -// -// As currently written, it is not thread-safe. -template <typename T> -class LLSingleton -{ -public: - virtual ~LLSingleton() {} -#ifdef LL_MSVC7 -// workaround for VC7 compiler bug -// adapted from http://www.codeproject.com/KB/tips/VC2003MeyersSingletonBug.aspx -// our version doesn't introduce a nested struct so that you can still declare LLSingleton<MyClass> -// a friend and hide your constructor - static T* getInstance() - { - LLSingleton<T> singleton; - return singleton.vsHack(); - } - - T* vsHack() -#else - static T* getInstance() -#endif - { - static T instance; - static bool needs_init = true; - if (needs_init) - { - needs_init = false; - instance.initSingleton(); - } - return &instance; - } - - static T& instance() - { - return *getInstance(); - } - -private: - virtual void initSingleton() {} -}; +// LLPointer moved to llpointer.h -//---------------------------------------------------------------------------- +// LLSafeHandle moved to llsafehandle.h -// Return the resident set size of the current process, in bytes. -// Return value is zero if not known. -U64 getCurrentRSS(); +// LLSingleton moved to llsingleton.h #endif |