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ScaleGuestDurationFileTime for absolute times. Probably right. 

Fixes #409.
This commit is contained in:
Ben Vanik 2015-08-30 15:40:10 -07:00
parent b80a028589
commit 499e8b4b5b
1 changed files with 13 additions and 8 deletions
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15
src/xenia/base/clock.cc
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@ -95,18 +95,23 @@ uint32_t Clock::ScaleGuestDurationMillis(uint32_t guest_ms) {
} }
int64_t Clock::ScaleGuestDurationFileTime(int64_t guest_file_time) { int64_t Clock::ScaleGuestDurationFileTime(int64_t guest_file_time) {
// negative = relative times
// positive = absolute times
// TODO(benvanik): support absolute times.
assert_true(guest_file_time <= 0);
if (!guest_file_time) { if (!guest_file_time) {
return 0; return 0;
} } else if (guest_file_time > 0) {
// Absolute time.
uint64_t guest_time = Clock::QueryGuestSystemTime();
int64_t relative_time = guest_file_time - static_cast<int64_t>(guest_time);
int64_t scaled_time =
static_cast<int64_t>(relative_time * guest_time_scalar_);
return static_cast<int64_t>(guest_time) + scaled_time;
} else {
// Relative time.
uint64_t scaled_file_time = uint64_t scaled_file_time =
uint64_t(uint64_t(guest_file_time) * guest_time_scalar_); uint64_t(uint64_t(guest_file_time) * guest_time_scalar_);
// TODO(benvanik): check for overflow? // TODO(benvanik): check for overflow?
return scaled_file_time; return scaled_file_time;
} }
}
void Clock::ScaleGuestDurationTimeval(int32_t* tv_sec, int32_t* tv_usec) { void Clock::ScaleGuestDurationTimeval(int32_t* tv_sec, int32_t* tv_usec) {
uint64_t scaled_sec = uint64_t(uint64_t(*tv_sec) * guest_tick_scalar_); uint64_t scaled_sec = uint64_t(uint64_t(*tv_sec) * guest_tick_scalar_);