Re: [ros-dev] Error handling

[ea]

Hi Phillip,
welcome back!

Does this baroque solution based on the "Think positive!" motto satisfy 
you? :)

Emanuele

#include <all_inclusive.h>

#define CLEANUP_DEFINE  DWORD __FUNCTION__##__cleanup_mask = 0
#define CLEANUP_SET(f)  __FUNCTION__##__cleanup_mask != (m)
#define CLEANUP_DO(m,f) if (__FUNCTION__##__cleanup_mask & (m)) (f)
#define CLEANUP_BIT(b) (1<<(b))

NSTATUS DoSomething()
{
    NSTATUS Status = STATUS_SUCCESS;
    CLEANUP_DEFINE;
#define MASK_XXX CLEANUP_BIT(1)
#define MASK_YYY CLEANUP_BIT(2)
#define MASK_ZZZ CLEANUP_BIT(3)
    ...

Status = NtXXX();
    if (NT_SUCCESS(Status))
    {
    	CLEANUP_SET(MASK_XXX);
    	Status = NtYYY();
    	if (NT_SUCCESS(Status))
    	{
    		CLEANUP_SET(MASK_YYY);
    		Status = NtZZZ();
    		if (NT_SUCCESS(Status))
    		{
    			CLEANUP_SET(MASK_ZZZ);
    			// yay, everything worked
    		}
    	}
    }
    CLEANUP_DO(MASK_ZZZ,cleanupZZZ);
    CLEANUP_DO(MASK_YYY,cleanupYYY);
    CLEANUP_DO(MASK_XXX,cleanupXXX);
    return Status;
}
/* EOF */