How can I handle error in Tizen Native app using C language?

Question

in the C language there isn't the statement try/catch. How can I handle the errors?

Answer 1

C libraries use different mechanisms for error handling:

The return value of each function may contain an error value. The caller then needs to verify, after each function call, that the return value indicates a non-error state. For example most functions in <unistd.h>.

Some use a global variable which is set to a non-zero value when an error occured. For example, on failure, fopen sets errno (global variable from C standard library) to an error value, and also returns -1 instead of a file descriptor. This is also part of the C standard, see: http://en.cppreference.com/w/c/error/errno.

Finally exception handling like in C++ may be simulated using longjmp: The calles first calls setjmp at a given place in code. The library function, when it fails, then jumps directly to that place using longjmp. For example libpng does this, as described in http://www.libpng.org/pub/png/libpng-manual.txt. But there are several difficulties with this.

Answer 2

I totally agree with @tmlen and more added for the Tizen specific,

You can catch a error with get_last_error() if the error is originated from Tizen Native API.

refer: https://developer.tizen.org/development/api-references/native-application?redirect=/dev-guide/latest/org.tizen.native.mobile.apireference/group__CAPI__COMMON__ERROR.html

int get_last_result (void);
char* get_error_message (int err);

And errors from EFL can caught with eina_error_get()/eina_error_msg_get()

but unfortunately Tizen 2.4 does not support eina error functions. it support only error type. (I can't understand about EFL guys in samsung...)