clock

Namespaces

```
namespace testing
```

Records

```
class ClockSnapshot
```

class CloneMonoTest_AdjustableClockCanBeAdjusted_Test

class CloneMonoTest_AdjustableCloneIsSameAsClockMonotonic_Test

class CloneMonoTest_ReadableCloneIsSameAsClockMonotonic_Test

class CloneMonoTest_ReadonlyClockCannotBeAdjusted_Test

class PidControlTest_DefaultAndReset_Test

class PidControlTest_DefaultCoefficients_Test

class PidControlTest_PastTimestampsAreIgnored_Test

class PidControlTest_ProportionalIntegral_Test

Functions

```
void CloneMonotonicInto (zx::clock * clock_out, bool adjustable)
```
Defined at line 12 of file ../../src/media/audio/lib/clock/clone_mono.cc
```
zx::clock AdjustableCloneOfMonotonic ()
```
Defined at line 26 of file ../../src/media/audio/lib/clock/clone_mono.cc
```
zx::clock CloneOfMonotonic ()
```
Defined at line 33 of file ../../src/media/audio/lib/clock/clone_mono.cc

zx_status_t GetAndDisplayClockDetails (const zx::clock & ref_clock)

Defined at line 14 of file ../../src/media/audio/lib/clock/utils.cc

fpromise::result<zx_clock_details_v1_t, zx_status_t> GetClockDetails (const zx::clock & ref_clock)

Defined at line 24 of file ../../src/media/audio/lib/clock/utils.cc

```
void DisplayClockDetails (const zx_clock_details_v1_t & clock_details)
```
Only called by custom code when debugging, so can remain at INFO severity.

Defined at line 41 of file ../../src/media/audio/lib/clock/utils.cc
```
zx_koid_t GetKoid (const zx::clock & clock)
```
Defined at line 67 of file ../../src/media/audio/lib/clock/utils.cc

zx::clock DuplicateClock (const zx::clock & clock, zx_rights_t rights)

Defined at line 79 of file ../../src/media/audio/lib/clock/utils.cc

fpromise::result<ClockSnapshot, zx_status_t> SnapshotClock (const zx::clock & ref_clock)

Defined at line 85 of file ../../src/media/audio/lib/clock/utils.cc

```
fpromise::result<zx::time, zx_status_t> ReferenceTimeFromMonotonicTime (const zx::clock & ref_clock, zx::time mono_time)
```
Naming is confusing here. zx::clock transforms/structs call the underlying baseline clock (ticks

or monotonic: we use monotonic) their "reference" clock. Unfortunately, in media terminology a

"reference clock" could be any continuous monotonically increasing clock -- including not only

the local system monotonic, but also custom clocks maintained outside the kernel (which zx::clock

calls "synthetic" clocks).

Thus in these util functions that convert between clocks, a conversion that we usually call "from

monotonic to reference" is (in zx::clock terms) a conversion "from reference to synthetic", where

the baseline reference here is the monotonic clock.

Defined at line 117 of file ../../src/media/audio/lib/clock/utils.cc

fpromise::result<zx::time, zx_status_t> MonotonicTimeFromReferenceTime (const zx::clock & ref_clock, zx::time ref_time)

Defined at line 133 of file ../../src/media/audio/lib/clock/utils.cc

fpromise::result<zx::time, zx_status_t> ReferenceTimeFromReferenceTime (const zx::clock & ref_clock_a, zx::time ref_time_a, const zx::clock & ref_clock_b)

Defined at line 149 of file ../../src/media/audio/lib/clock/utils.cc

affine::Transform ToAffineTransform (TimelineFunction & tl_function)

Defined at line 177 of file ../../src/media/audio/lib/clock/utils.cc

TimelineFunction ToTimelineFunction (affine::Transform affine_trans)

Defined at line 183 of file ../../src/media/audio/lib/clock/utils.cc

```
std::ostream & operator<< (std::ostream & outconst PidControl & pid)
```
Defined at line 67 of file ../../src/media/audio/lib/clock/pid_control.cc