#ifndef CPUUSAGE_H_
#define CPUUSAGE_H_

typedef struct {
    long utime;  // 用户态时间
    long stime;  // 内核态时间
} cputime_t;

struct rusage {
    int a;
};

#ifdef __cplusplus
extern "C" {
#endif

int calculate_user_cpu_time(struct rusage *prev_ru, struct rusage *curr_ru);
double calculate_cpu_usage(struct rusage *prev_ru, struct rusage *curr_ru);

#ifdef __cplusplus
}   // extern "C"   
#endif  

#endif