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authorSteven Bennetts <steve@lindenlab.com>2009-06-21 08:04:56 +0000
committerSteven Bennetts <steve@lindenlab.com>2009-06-21 08:04:56 +0000
commit9ec432034dc3c45d7ce763eb02dae4cc7f6b8da8 (patch)
tree4a505c1e0919af52800b3ffb3eaf135e7d6f9ce6 /indra/llcommon/llmemory.h
parent351ebe9fcb76f3b99c2957004bb8493a904869ee (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.h429
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