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git.proxmox.com Git - mirror_edk2.git/blob - StdLib/Include/sys/time.h
2 System-specific declarations and macros related to time.
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40 time.h 8.5 (Berkeley) 5/4/95
41 NetBSD: time.h,v 1.56 2006/06/18 21:09:24 uwe Exp
47 #include <sys/featuretest.h>
48 #include <sys/types.h>
51 * Traditional *nix structure returned by gettimeofday(2) system call,
52 * and used in other calls.
55 LONG32 tv_sec
; /* seconds */
56 LONG32 tv_usec
; /* and microseconds */
60 * Structure defined by POSIX.1b to be like a timeval.
61 * This works within EFI since the times really are time_t.
64 time_t tv_sec
; /* seconds */
65 LONG32 tv_nsec
; /* and nanoseconds */
68 #define TIMEVAL_TO_TIMESPEC(tv, ts) do { \
69 (ts)->tv_sec = (tv)->tv_sec; \
70 (ts)->tv_nsec = (tv)->tv_usec * 1000; \
71 } while (/*CONSTCOND*/0)
73 #define TIMESPEC_TO_TIMEVAL(tv, ts) do { \
74 (tv)->tv_sec = (ts)->tv_sec; \
75 (tv)->tv_usec = (ts)->tv_nsec / 1000; \
76 } while (/*CONSTCOND*/0)
78 /* Operations on timevals. */
79 #define timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0
80 #define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
82 #define timercmp(tvp, uvp, cmp) \
83 (((tvp)->tv_sec == (uvp)->tv_sec) ? \
84 ((tvp)->tv_usec cmp (uvp)->tv_usec) : \
85 ((tvp)->tv_sec cmp (uvp)->tv_sec))
87 #define timeradd(tvp, uvp, vvp) \
89 (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
90 (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
91 if ((vvp)->tv_usec >= 1000000) { \
93 (vvp)->tv_usec -= 1000000; \
95 } while (/* CONSTCOND */ 0)
97 #define timersub(tvp, uvp, vvp) \
99 (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
100 (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
101 if ((vvp)->tv_usec < 0) { \
103 (vvp)->tv_usec += 1000000; \
105 } while (/* CONSTCOND */ 0)
107 /* Operations on timespecs. */
108 #define timespecclear(tsp) (tsp)->tv_sec = (tsp)->tv_nsec = 0
109 #define timespecisset(tsp) ((tsp)->tv_sec || (tsp)->tv_nsec)
111 #define timespeccmp(tsp, usp, cmp) \
112 (((tsp)->tv_sec == (usp)->tv_sec) ? \
113 ((tsp)->tv_nsec cmp (usp)->tv_nsec) : \
114 ((tsp)->tv_sec cmp (usp)->tv_sec))
116 #define timespecadd(tsp, usp, vsp) \
118 (vsp)->tv_sec = (tsp)->tv_sec + (usp)->tv_sec; \
119 (vsp)->tv_nsec = (tsp)->tv_nsec + (usp)->tv_nsec; \
120 if ((vsp)->tv_nsec >= 1000000000L) { \
122 (vsp)->tv_nsec -= 1000000000L; \
124 } while (/* CONSTCOND */ 0)
126 #define timespecsub(tsp, usp, vsp) \
128 (vsp)->tv_sec = (tsp)->tv_sec - (usp)->tv_sec; \
129 (vsp)->tv_nsec = (tsp)->tv_nsec - (usp)->tv_nsec; \
130 if ((vsp)->tv_nsec < 0) { \
132 (vsp)->tv_nsec += 1000000000L; \
134 } while (/* CONSTCOND */ 0)
137 * Names of the interval timers, and structure
138 * defining a timer setting.
140 #define ITIMER_REAL 0
141 #define ITIMER_VIRTUAL 1
142 #define ITIMER_PROF 2
145 struct timeval it_interval
; /* timer interval */
146 struct timeval it_value
; /* current value */
150 * Structure defined by POSIX.1b to be like a itimerval, but with
151 * timespecs. Used in the timer_*() system calls.
154 struct timespec it_interval
;
155 struct timespec it_value
;
158 #define CLOCK_REALTIME 0
159 #define CLOCK_VIRTUAL 1
161 #define CLOCK_MONOTONIC 3
163 #define TIMER_RELTIME 0x0 /* relative timer */
164 #define TIMER_ABSTIME 0x1 /* absolute timer */
167 #if (_POSIX_C_SOURCE - 0) >= 200112L || \
168 (defined(_XOPEN_SOURCE) && defined(_XOPEN_SOURCE_EXTENDED)) || \
169 (_XOPEN_SOURCE - 0) >= 500 || defined(_NETBSD_SOURCE)
170 #include <sys/select.h>
174 #include <sys/EfiCdefs.h>
177 /* Functions useful for dealing with EFI */
180 /* Convert an EFI_TIME structure into a time_t value. */
181 time_t Efi2Time( EFI_TIME
*EfiBDtime
);
183 /* Convert a time_t value into an EFI_TIME structure.
184 It is the caller's responsibility to free the returned structure.
186 EFI_TIME
* Time2Efi(time_t OTime
);
188 /* Convert an EFI_TIME structure into a C Standard tm structure. */
189 void Efi2Tm( EFI_TIME
*EfiBDtime
, struct tm
*NewTime
);
190 void Tm2Efi( struct tm
*BdTime
, EFI_TIME
*ETime
);
192 /* BSD compatibility functions */
193 int gettimeofday (struct timeval
*tp
, void *ignore
);
194 /* POSIX compatibility functions */
195 int getitimer (int which
, struct itimerval
*value
);
196 int setitimer (int which
, const struct itimerval
*value
, struct itimerval
*ovalue
);
200 #endif /* !_SYS_TIME_H_ */