pxr::ArchMallocHook Class Reference

Override default malloc() functionality. More...

#include <mallocHook.h>

Public Member Functions
bool	Initialize (void *(*mallocWrapper)(size_t, const void *), void *(*reallocWrapper)(void *, size_t, const void *), void *(*memalignWrapper)(size_t, size_t, const void *), void(*freeWrapper)(void *, const void *), std::string *errMsg)
	Initialize hooks.
bool	IsInitialized ()
	Return true if *this has been (successfully) initialized.
void *	Malloc (size_t nBytes)
	Call the original system malloc() function.
void *	Realloc (void *ptr, size_t nBytes)
	Call the original system realloc() function.
void *	Memalign (size_t alignment, size_t nBytes)
	Call the original system memalign() function.
void	Free (void *ptr)
	Call the original system free() function.

Detailed Description

Override default malloc() functionality.

The ArchMallocHook class is used on supported systems to install a call-back function in place of the standard malloc/realloc/free/memalign function calls. Supported systems are currently restricted to 64-bit linux systems.

The call-back function can access the original allocation function by calling, for example, ArchMallocHook::Malloc, or it is free to perform its own allocation.

The ArchMallocHook is a POD (plain old datastructure) which means that to use it properly, it should be declared at global scope, ensuring zero-initialization.

Member Function Documentation

Initialize()

bool pxr::ArchMallocHook::Initialize	(	void *(*	mallocWrapper )(size_t, const void *),
		void *(*	reallocWrapper )(void *, size_t, const void *),
		void *(*	memalignWrapper )(size_t, size_t, const void *),
		void(*	freeWrapper )(void *, const void *),
		std::string *	errMsg )

Initialize hooks.

Calling Initialize() installs the supplied functions as call-back in place of the standard system memory allocation routines. Note that the callbacks take an extra const void* parameter; on supported systems, the called function should simply ignore the extra parameter.

If initialization fails, false is returned and *errMsg is set accordingly. If *this has already been initialized, calling Initialize() a second time will fail.

IsInitialized()

bool pxr::ArchMallocHook::IsInitialized

(

)

Return true if *this has been (successfully) initialized.

In order for this function to work properly, this cannot be a local or dynamically initialized variable; rather, this must be a global variable, to ensure zero-initialization.

Malloc()

void * pxr::ArchMallocHook::Malloc ( size_t nBytes )

inline

Call the original system malloc() function.

This function allows user-supplied callbacks to access the original system-supplied malloc() call. For speed reasons, no safety checks are performed; in particular, calling this function without having successfully initialized *this will likely crash your program.

Realloc()

void * pxr::ArchMallocHook::Realloc ( void * ptr, size_t nBytes )

inline

Call the original system realloc() function.

This function allows user-supplied callbacks to access the original system-supplied realloc() call. For speed reasons, no safety checks are performed; in particular, calling this function without having successfully initialized *this will likely crash your program.

Memalign()

void * pxr::ArchMallocHook::Memalign ( size_t alignment, size_t nBytes )

inline

Call the original system memalign() function.

This function allows user-supplied callbacks to access the original system-supplied memalign() call. For speed reasons, no safety checks are performed; in particular, calling this function without having successfully initialized *this will likely crash your program.

Free()

void pxr::ArchMallocHook::Free ( void * ptr )

inline

Call the original system free() function.

This function allows user-supplied callbacks to access the original system-supplied free() call. For speed reasons, no safety checks are performed; in particular, calling this function without having successfully initialized *this will likely crash your program.

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The documentation for this class was generated from the following file:

• mallocHook.h