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| author | Michael Brown | 2016-06-13 16:29:05 +0200 |
|---|---|---|
| committer | Michael Brown | 2016-06-13 16:29:05 +0200 |
| commit | e6111c151794c4c15a0988e259666ef5be24ffcc (patch) | |
| tree | 6e4febac53299a9ecbf4bff3c0a5dd676de75094 /src/include/ipxe/time.h | |
| parent | [tg3] Add missing memory barrier (diff) | |
| download | ipxe-e6111c151794c4c15a0988e259666ef5be24ffcc.tar.gz ipxe-e6111c151794c4c15a0988e259666ef5be24ffcc.tar.xz ipxe-e6111c151794c4c15a0988e259666ef5be24ffcc.zip | |
[time] Allow system clock to be adjusted at runtime
Provide a mechanism to allow an arbitrary adjustment to be applied to
all subsequent calls to time().
Note that the underlying clock source (e.g. the RTC clock) will not be
changed; only the time as reported within iPXE will be affected.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include/ipxe/time.h')
| -rw-r--r-- | src/include/ipxe/time.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/include/ipxe/time.h b/src/include/ipxe/time.h index 4c5bb2a00..89bf90e03 100644 --- a/src/include/ipxe/time.h +++ b/src/include/ipxe/time.h @@ -50,11 +50,24 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); /* Include all architecture-dependent time API headers */ #include <bits/time.h> +extern signed long time_offset; + /** - * Get current time in seconds + * Get current time in seconds (ignoring system clock offset) * * @ret time Time, in seconds */ time_t time_now ( void ); +/** + * Adjust system clock + * + * @v delta Clock adjustment, in seconds + */ +static inline __attribute__ (( always_inline )) void +time_adjust ( signed long delta ) { + + time_offset += delta; +} + #endif /* _IPXE_TIME_H */ |