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34 * libcfs/include/libcfs/libcfs_time.h
40 #ifndef __LIBCFS_TIME_H__
41 #define __LIBCFS_TIME_H__
43 * generic time manipulation functions.
46 static inline cfs_time_t cfs_time_add(cfs_time_t t, cfs_duration_t d)
48 return (cfs_time_t)(t + d);
51 static inline cfs_duration_t cfs_time_sub(cfs_time_t t1, cfs_time_t t2)
53 return (cfs_time_t)(t1 - t2);
56 static inline int cfs_time_after(cfs_time_t t1, cfs_time_t t2)
58 return cfs_time_before(t2, t1);
61 static inline int cfs_time_aftereq(cfs_time_t t1, cfs_time_t t2)
63 return cfs_time_beforeq(t2, t1);
67 static inline cfs_time_t cfs_time_shift(int seconds)
69 return cfs_time_add(cfs_time_current(), cfs_time_seconds(seconds));
72 static inline long cfs_timeval_sub(struct timeval *large, struct timeval *small,
73 struct timeval *result)
76 (large->tv_sec - small->tv_sec) * ONE_MILLION +
77 (large->tv_usec - small->tv_usec));
79 result->tv_usec = r % ONE_MILLION;
80 result->tv_sec = r / ONE_MILLION;
85 static inline void cfs_slow_warning(cfs_time_t now, int seconds, char *msg)
87 if (cfs_time_after(cfs_time_current(),
88 cfs_time_add(now, cfs_time_seconds(15))))
89 CERROR("slow %s "CFS_TIME_T" sec\n", msg,
90 cfs_duration_sec(cfs_time_sub(cfs_time_current(),now)));
93 #define CFS_RATELIMIT(seconds) \
96 * XXX nikita: non-portable initializer \
98 static time_t __next_message = 0; \
101 if (cfs_time_after(cfs_time_current(), __next_message)) \
104 __next_message = cfs_time_shift(seconds); \
111 * helper function similar to do_gettimeofday() of Linux kernel
113 static inline void cfs_fs_timeval(struct timeval *tv)
117 cfs_fs_time_current(&time);
118 cfs_fs_time_usec(&time, tv);
122 * return valid time-out based on user supplied one. Currently we only check
123 * that time-out is not shorted than allowed.
125 static inline cfs_duration_t cfs_timeout_cap(cfs_duration_t timeout)
127 if (timeout < CFS_TICK)