Thread: Re: [Opencxx-users] Checking of return codes

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> I am not sure if I understand the details. Could you provide an example
> of code transformation that OpenC++ or Synopsis should perform? I mean
> the code before transformation and after transformation?

1. memory allocation
structure* data = malloc(sizeof(structure));

// error: The check for the null pointer may be forgotten.
data -> counter = 1;

Transformation:
// Add this line at the previous comment to avoid a segmentation fault.
if (!data) { throw bad_alloc; /* Or do you prefer to call the function "abort" here? */ }

2. mutual exclusion
pthread_mutex_t m = PTHREAD_MUTEX_INITIALIZER;
size_t counter = 0;

void inc1()
{
  pthread_mutex_lock(&foo_mutex);
  ++counter;
  pthread_mutex_unlock(&foo_mutex);
}

Transformation:
int inc2()
{
  int result = pthread_mutex_lock(&m);

  if (result) return result;

  ++counter;
  return pthread_mutex_unlock(&m);
}

3. output functions
fprintf(my_ostream, "<body>");

Transformation:
if (fprintf(my_ostream, "<body>") == EOF)
 {
  // What do you want to do here when the string was not completely written to the file?
 }

Regards,
Markus

Thread: Re: [Opencxx-users] Checking of return codes

opencxx-users