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Sketched out a template for clock-receiving components to allow them to be implemented in terms of either half or whole cycles.

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Thomas Harte 2017-07-22 21:46:50 -04:00
parent 97334e10af
commit 1ba3f262a2
2 changed files with 57 additions and 0 deletions
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55
Components/ClockReceiver.hpp Normal file
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//
// ClockReceiver.hpp
// Clock Signal
//
// Created by Thomas Harte on 22/07/2017.
// Copyright © 2017 Thomas Harte. All rights reserved.
//
#ifndef ClockReceiver_hpp
#define ClockReceiver_hpp
/*! Describes an integer number of whole cycles — pairs of clock signal transitions. */
class Cycles {
public:
Cycles(int l) : length_(l) {}
operator int() const { return length_; }
private:
int length_;
};
/*! Describes an integer number of half cycles — single clock signal transitions. */
class HalfCycles {
public:
HalfCycles(int l) : length_(l) {}
HalfCycles(const Cycles &cycles) : length_(int(cycles) << 1) {}
operator int() const { return length_; }
private:
int length_;
};
/*!
ClockReceiver is a template for components that receove a clock, measured either
in cycles or in half cycles. They are expected to implement either of the run_for
methods; buying into the template means that the other run_for will automatically
map appropriately to the implemented one, so callers may use either.
*/
template <class T> class ClockReceiver {
public:
void run_for(const Cycles &cycles) {
static_cast<T *>(this)->run_for(HalfCycles(cycles));
}
void run_for(const HalfCycles &half_cycles) {
int cycles = int(half_cycles) + half_cycle_carry;
half_cycle_carry = cycles & 1;
run_for(Cycles(cycles >> 1));
}
private:
int half_cycle_carry;
};
#endif /* ClockReceiver_hpp */

2
OSBindings/Mac/Clock Signal.xcodeproj/project.pbxproj
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@ -563,6 +563,7 @@
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@ -1988,6 +1989,7 @@
4BC9DF4A1D04691600F44158 /* Components */ = {
isa = PBXGroup;
children = (
4B4EA7E01F24349400C216B4 /* ClockReceiver.hpp */,
4BD468F81D8DF4290084958B /* 1770 */,
4BC9DF4B1D04691600F44158 /* 6522 */,
4B1E85791D174DEC001EF87D /* 6532 */,