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TIMERADD(3) | Linux Programmer's Manual | TIMERADD(3) |
NAME¶
timeradd, timersub, timercmp, timerclear, timerisset - timeval operationsSYNOPSIS¶
#include <sys/time.h> void timeradd(struct timeval *a, struct timeval *b, struct timeval *res); void timersub(struct timeval *a, struct timeval *b, struct timeval *res); void timerclear(struct timeval *tvp); int timerisset(struct timeval *tvp); int timercmp(struct timeval *a, struct timeval *b, CMP);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
DESCRIPTION¶
The macros are provided to operate on timeval structures, defined in <sys/time.h> as:struct timeval { time_t tv_sec; /* seconds */ suseconds_t tv_usec; /* microseconds */ };
timeradd() adds the time values in a and b, and places the sum in the timeval pointed to by res. The result is normalized such that res->tv_usec has a value in the range 0 to 999,999.
!timercmp(..., <)
!timercmp(..., >)
!timercmp(..., !=)
RETURN VALUE¶
timerisset() and timercmp() return true (nonzero) or false (0).ERRORS¶
No errors are defined.CONFORMING TO¶
Not in POSIX.1-2001. Present on most BSD derivatives.SEE ALSO¶
gettimeofday(2), time(7)COLOPHON¶
This page is part of release 3.44 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.2010-02-25 | Linux |