diff options
| author | Ranjith Kumaran <ranjith@cygnus.com> | 2000-05-15 22:30:03 +0400 |
|---|---|---|
| committer | Ranjith Kumaran <ranjith@cygnus.com> | 2000-05-15 22:30:03 +0400 |
| commit | 75362a768be4a15953e4a30314ec695174049ef2 (patch) | |
| tree | 0bb1f201bb4f917c731ecede788b54aa0631e483 /newlib/libc | |
| parent | 4004738117733a2a6f26ac68fb7e0d4dad3520d9 (diff) | |
Mon May 15 14:26:00 2000 Joel Sherrill <joel@oarcorp.com>
* libc/sys/rtems/sys/time.h: Add macros for manipulating timeval
structures.
Diffstat (limited to 'newlib/libc')
| -rw-r--r-- | newlib/libc/sys/rtems/sys/time.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/newlib/libc/sys/rtems/sys/time.h b/newlib/libc/sys/rtems/sys/time.h index 596ec5730..ea3325772 100644 --- a/newlib/libc/sys/rtems/sys/time.h +++ b/newlib/libc/sys/rtems/sys/time.h @@ -65,6 +65,33 @@ int gettimeofday( struct timezone *tzp ); +/* Convenience macros for operations on timevals. + NOTE: `timercmp' does not work for >= or <=. */ +#define timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec) +#define timerclear(tvp) ((tvp)->tv_sec = (tvp)->tv_usec = 0) +#define timercmp(a, b, CMP) \ + (((a)->tv_sec == (b)->tv_sec) ? \ + ((a)->tv_usec CMP (b)->tv_usec) : \ + ((a)->tv_sec CMP (b)->tv_sec)) +#define timeradd(a, b, result) \ + do { \ + (result)->tv_sec = (a)->tv_sec + (b)->tv_sec; \ + (result)->tv_usec = (a)->tv_usec + (b)->tv_usec; \ + if ((result)->tv_usec >= 1000000) \ + { \ + ++(result)->tv_sec; \ + (result)->tv_usec -= 1000000; \ + } \ + } while (0) +#define timersub(a, b, result) \ + do { \ + (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \ + (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \ + if ((result)->tv_usec < 0) { \ + --(result)->tv_sec; \ + (result)->tv_usec += 1000000; \ + } \ + } while (0) #ifdef __cplusplus } #endif |