scope_exit.c

#include <stdio.h>

#define TOKENPASTE(x, y) x ## y
#define TOKENPASTE2(x, y) TOKENPASTE(x, y)
#define UNIQUE_FUNC_NAME TOKENPASTE2(cleanuper_func_, __LINE__)
#define UNIQUE_VAR_NAME TOKENPASTE2(cleanuper_var_, __LINE__)

#define SCOPE_EXIT(code_) \
        void UNIQUE_FUNC_NAME(int *t __attribute__((unused))) \
        code_ \
        int UNIQUE_VAR_NAME __attribute__((cleanup(UNIQUE_FUNC_NAME)));

int main()
{
        SCOPE_EXIT({ printf("i'm in scoped exit 1\n"); });
        SCOPE_EXIT({ printf("i'm in scoped exit 2\n"); });
        printf("i'm before return\n");
        return 1;
}