public interface BooleanClockedSignalSource extends BooleanSignalSource, AbstractClockedSignalSource
boolean whose observable state is
driven by a clock.
This interface excludes signal sources whose state changes asynchronously, but is neutral with respect to whether values are computed on the fly when demanded, or stored when available and then just retrieved.
The operation of the driving clock works as specified by the Process superinterface. For example, a main loop may use the following
pattern:
RealtimeContext rc = ...;
BooleanClockedSignalSource c = ...;
c.init();
while (...) {
c.step(rc);
boolean v = c.getAsBoolean();
...
}
Every iteration of the main loop increases the clock index of the
component c. The behavior of instances of this interface is
typically specified in terms of the current clock index.
ProcessProcess.ProxySTREAM_CHARACTERISTICS, STREAM_SIZE| Modifier and Type | Method and Description |
|---|---|
static BooleanClockedSignalSource |
adHoc(boolean... elems)
Returns a new signal source that produces the given values, one per clock tick.
|
default BooleanClockedSignalSource |
after(Process... slaves) |
default BooleanClockedSignalSource |
compile()
Returns a new signal source that realizes the same behavior as this signal
source with specialized code.
|
static BooleanClockedSignalSource |
cycle(boolean... elems)
Returns a new signal source that produces the given values repeatedly, one
per clock tick.
|
default BooleanClockedSignalSource |
during(Register outer) |
static BooleanClockedSignalSource |
initially()
Returns a new signal source that produces the value
true at the
first clock tick only. |
static BooleanClockedSignalSource |
subsequently()
Returns a new signal source that produces the value
true at any
but the first clock tick. |
and, becoming, ceasing, choose, choose, choose, choose, choose, choose, choose, choose, choose, choose, choose, clock, compileDataFlow, compileMainSignalSource, constant, delayed, delayed, delayedFeedback, delayedFeedback, getAsBoolean, getConstantAsBoolean, getValueClass, guard, hasConstantAsBoolean, invariant, map, not, or, power, probe, publishStoredValueVariable, relateWith, sampleAndHold, stored, xor, zipWithcompileDataFlowTo, hasDataFlowIOafterEvery, andThen, compileAsMainProcess, compileControlFlow, compileInitialization, every, getProcess, hasControlFlowIO, hasInitializationIO, init, probe, sequence, sequence, stepdefault BooleanClockedSignalSource after(Process... slaves)
default BooleanClockedSignalSource during(Register outer)
@SafeVarargs static BooleanClockedSignalSource adHoc(boolean... elems)
After the given values are exhausted, that is after as many clock ticks as there are elements in the array, the default value of the element type is held indefinitely.
At clock index n, this.getAsBoolean() == (n <
elems.length ? elems[n] : false) holds.
elems - the array of values to produce@SafeVarargs static BooleanClockedSignalSource cycle(boolean... elems)
When the given values are exhausted the iteration starts over.
At clock index n, this.getAsBoolean() == elems[n %
elems.length] holds.
elems - the array of values to producedefault BooleanClockedSignalSource compile()
The resulting object displays the same long-term behavior (reaction with output values to realtime events) as this signal source. Its internal state is undefined phase until initialized properly.
Specialized JVM byte code is generated, and a new class is loaded for the implementation. It can be expected to execute more efficiently than the original after a warm-up phase, subject to the usual conditions of JVM just-in-time compilation. Hence compilation is recommended for components to be used in tight long-running loops, but not for one-off or infrequent computations.
The original and the compiled instance do not share state phase or memory; their life cycles are independent except for shared non-compilable components. For the latter reason, it is recommended not to use both instances concurrently.
static BooleanClockedSignalSource initially()
true at the
first clock tick only.
At clock index n, this.getAsBoolean() == (n == 0)
holds.
static BooleanClockedSignalSource subsequently()
true at any
but the first clock tick.
At clock index n, this.getAsBoolean() == (n > 0)
holds.