jitterbug/try.h

#ifndef __JITTERBUG_TRY_H
#define __JITTERBUG_TRY_H

#include "config.h"
#include "util.h"

#ifdef JB_ENABLE_TRY_TRACE
#define __TRY_TRACE() do { \
        printf("trace: %s:%d\n", __FILE__, __LINE__); \
    } while(0)
#else
#define __TRY_TRACE()
#endif // JB_ENABLE_TRY_TRACE


// NOTE: The macro(s) below make use of a GCC extension called "Statement Exprs", which is nonstandard.
//       More info: https://gcc.gnu.org/onlinedocs/gcc/Statement-Exprs.html

#define TRYPTR_NIL(M_expr) __extension__({ void* _result = (void*)(M_expr); if (unlikely(!_result)) { __TRY_TRACE(); return (NULL); } _result; })
#define TRYPTR(M_expr) __extension__({ void* _result = (void*)(M_expr); if (unlikely(!_result)) { __TRY_TRACE(); return (-1); } _result; })

#define TRYST_NIL(M_expr) __extension__({ int _result = (int)(M_expr); if (unlikely(_result < 0)) { __TRY_TRACE(); return (NULL); } _result; })
#define TRYST(M_expr) __extension__({ int _result = (int)(M_expr); if (unlikely(_result < 0)) { __TRY_TRACE(); return (-1); } _result; })

#endif // __JITTERBUG_TRY_H