somemoryerror(3)
NAME
SoMemoryError
SYNOPSIS
#include <Inventor/errors/SoMemoryError.h> Inherits SoError.
Detailed Description
The SoMemoryError class is used to inform of problems with memory
allocation.
Modern operating systems takes care of handling most out of memory
conditions for you, but in certain situations it can be wise to do some
manual checking and intervention. This class is provided as an aid to
help out in these situations.
The basic design of the Coin library is to pass on the responsibility
for handling failed attempts at memory allocation to the application
programmer. If you want to detect and take care of these, you should
compile Coin with the C++ exception throwing on and wrap your code
within try{} and catch{} blocks. The most you can do if you get a
failed allocation is typically to notify the user and then exit the
application, though, and this is something most operating systems will
do for you, so you probably need not consider this at all.
So, where does the SoMemoryError class come in handy? There are certain
things which could happen within the library which are best taken care
of by internally handling failed attempts at memory allocation. An
example: the user tries to load a model file which contains a filename
pointer to a huge bitmapfile with a texture map. The end-user's system
does not provide enough memory to load the file and prepare the texture
image for rendering, though. This is a case where it is possible to
just emit a warning and continue. The warning will then be passed
through this class.
- Note that SoMemoryError is probably not of much use to the application
programmer.
- Public Member Functions
- virtual SoType getTypeId (void) const
- Static Public Member Functions
- static void setHandlerCallback (SoErrorCB *const callback, void *const
data)
- static SoErrorCB * getHandlerCallback (void)
static void * getHandlerData (void)
static SoType getClassTypeId (void) static void post (const char *const whatWasAllocated)
static void initClass (void) - Protected Member Functions
- virtual SoErrorCBPtr getHandler (void *&data) const
Member Function Documentation
- void SoMemoryError::setHandlerCallback (SoErrorCB *const function, void
- *const data) [static]
This method sets the error handler callback for messages posted via
this class. - Note that this will not override the error/debug message handler for
subclasses, these will have to be overrided by calling the subclass'
setHandlerCallback() method. - See also:
defaultHandlerCB()
- Reimplemented from SoError.
- SoErrorCB * SoMemoryError::getHandlerCallback (void) [static]
- Returns the error handler callback for messages posted via this class.
- Reimplemented from SoError.
- void * SoMemoryError::getHandlerData (void) [static]
- This method returns the pointer used for passing data back to the
callback handler method. - Reimplemented from SoError.
- SoType SoMemoryError::getClassTypeId (void) [static]
- This static method returns the SoType for this class.
- See also:
getTypeId()
- Reimplemented from SoError.
- SoType SoMemoryError::getTypeId (void) const [virtual]
- This method returns the SoType of a particular object instance.
- See also:
getClassTypeId()
- Reimplemented from SoError.
- void SoMemoryError::post (const char *const whatWasAllocated) [static]
- Posts a warning about a failed memory allocation. whatWasAllocated should contain a description of what we tried to allocate.
- References SoError::appendToDebugString(), SoError::handleError(), and SoError::setDebugString().
- void SoMemoryError::initClass (void) [static]
- This method takes care of initializing all static data for the class.
- Reimplemented from SoError.
- References SoType::createType(), SoError::defaultHandlerCB(), and
SoError::getClassTypeId(). - Referenced by SoError::initClasses().
- SoErrorCB * SoMemoryError::getHandler (void *& data) const [protected,
- virtual]
This is just a convenience wrapper around the getHandlerCallback() and getHandlerData() methods. - Reimplemented from SoError.
Author
- Generated automatically by Doxygen for Coin from the source code.