A handler is selected to handle an exception if the type of its exception declaration matches the type of the exception thrown. (We will see in Chapter 19 that the types do not have to match exactly: a handler
If an exception occurs,ptrwill not set to&zandvlawill not have its storage allocated. The use of*ptrandvla[0]may be illegal ifptris not initialized and the storage forvlais not allocated. void func(unsigned int i) { unsigned int *ptr = NULL; unsigned int z; #pragma exception_handler(...
Function's prologue creates this structure on its stack frame and registers it with the operating system. The epilogue restores the EXCEPTION_REGISTRATION of the caller. I will discuss the significance of the id field in the next sections. When VC++ compiles a function, it generates two set...
Each interrupt (apart from the NMI) can be enabled or disabled and can have its pending status set or cleared by software. The NVIC can handle various types ofinterrupt sources: • Pulsed interrupt request – the interrupt request is at least one clock cycle long. When the NVIC receives ...
Each new thread needs to install its own unexpected and terminate function. Thus, each thread is in charge of its own unexpected and terminate handling. Pure Call Handler Use the _set_purecall_handler() function to handle pure virtual function calls. This function can be used in VC++ .NET ...
The real power of C++ exception handling lies not only in its ability to deal with exceptions of varying types, but also in its ability to automatically call destructor functions during stack unwinding for all local objects constructed before the exception was thrown....
The conversion of a string to the following types in the System namespace can throw a FormatException exception: Boolean. The Boolean.Parse(String) and Convert.ToBoolean(String) methods require the string to be converted to be "True", "true", "False", or "false". Any other value throws...
When an exception is thrown in a program, the programming language’s exception handling mechanism is responsible for changing the normal control flow of the program to its exceptional control flow. Thus, when an exception is thrown, the normal activity of a program is interrupted, and an approp...
The system provides a mechanism for implicit initialization and finalization of the exception framework, so that it is safe to use try, catch, throw, etc. from any external function, even if its caller is not exception-aware whatsoever.
block that handles the exception. For this reason, in application code, a catch block that handles a type must be specified before a catch block that handles its base types, as demonstrated in the example that follows this section. A catch block that handles System.Exception is specified last...