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qga: add windows implementation for guest-get-time

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Signed-off-by: Lei Li <lilei@linux.vnet.ibm.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Lei Li 2013-03-15 17:29:04 +08:00 committed by Michael Roth
parent 5d45de9796
commit 3f2a6087de
1 changed files with 25 additions and 2 deletions
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27
qga/commands-win32.c
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@ -22,6 +22,12 @@
#define SHTDN_REASON_FLAG_PLANNED 0x80000000
#endif
/* multiple of 100 nanoseconds elapsed between windows baseline
* (1/1/1601) and Unix Epoch (1/1/1970), accounting for leap years */
#define W32_FT_OFFSET (10000000ULL * 60 * 60 * 24 * \
(365 * (1970 - 1601) + \
(1970 - 1601) / 4 - 3))
static void acquire_privilege(const char *name, Error **err)
{
HANDLE token;
@ -280,8 +286,25 @@ GuestNetworkInterfaceList *qmp_guest_network_get_interfaces(Error **err)
int64_t qmp_guest_get_time(Error **errp)
{
error_set(errp, QERR_UNSUPPORTED);
return -1;
SYSTEMTIME ts = {0};
int64_t time_ns;
FILETIME tf;
GetSystemTime(&ts);
if (ts.wYear < 1601 || ts.wYear > 30827) {
error_setg(errp, "Failed to get time");
return -1;
}
if (!SystemTimeToFileTime(&ts, &tf)) {
error_setg(errp, "Failed to convert system time: %d", (int)GetLastError());
return -1;
}
time_ns = ((((int64_t)tf.dwHighDateTime << 32) | tf.dwLowDateTime)
- W32_FT_OFFSET) * 100;
return time_ns;
}
void qmp_guest_set_time(int64_t time_ns, Error **errp)