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Add Fl_Timestamp Fl::distant_past()

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Can be handy when Fl::seconds_since() is used early at program startup
This commit is contained in:
ManoloFLTK 2023-09-26 12:30:36 +02:00
parent 0a2f05a2fe
commit 75273c06c5
2 changed files with 13 additions and 7 deletions
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1
FL/Fl.H
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@ -476,6 +476,7 @@ public:
static double seconds_between(Fl_Timestamp& back, Fl_Timestamp& further_back);
static long ticks_since(Fl_Timestamp& then);
static long ticks_between(Fl_Timestamp& back, Fl_Timestamp& further_back);
static const Fl_Timestamp distant_past();
// private
static void run_idle();

19
src/Fl_Timeout.cxx
View File

@ -19,6 +19,7 @@
#include "Fl_System_Driver.H"
#include <stdio.h>
#include <limits.h> // for LONG_MIN
/**
\file Fl_Timeout.cxx
@ -64,9 +65,10 @@ static int num_timers = 0; // DEBUG
\return this moment in time as an opaque time stamp
\see Fl::seconds_since(Fl_Timestamp& then)
Fl::seconds_between(Fl_Timestamp& back, Fl_Timestamp& further_back)
Fl::ticks_since(Fl_Timestamp& then)
Fl::ticks_between(Fl_Timestamp& back, Fl_Timestamp& further_back)
\see Fl::seconds_between(Fl_Timestamp& back, Fl_Timestamp& further_back)
\see Fl::ticks_since(Fl_Timestamp& then)
\see Fl::ticks_between(Fl_Timestamp& back, Fl_Timestamp& further_back)
\see Fl::distant_past()
*/
Fl_Timestamp Fl::now() {
Fl_Timestamp ts;
@ -78,6 +80,9 @@ Fl_Timestamp Fl::now() {
return ts; // C++ will copy the result into the lvalue for us
}
/** The time stamp of a time point in the distant past */
const Fl_Timestamp Fl::distant_past() { return {LONG_MIN/10, 0}; }
/**
Return the time in seconds between now and a previously taken time stamp.
@ -85,7 +90,7 @@ Fl_Timestamp Fl::now() {
\return elapsed seconds and fractions of a second
\see Fl::seconds_between(Fl_Timestamp& back, Fl_Timestamp& further_back)
Fl::now()
\see Fl::now() \see Fl::distant_past()
*/
double Fl::seconds_since(Fl_Timestamp& then) {
Fl_Timestamp ts_now = Fl::now();
@ -99,7 +104,7 @@ double Fl::seconds_since(Fl_Timestamp& then) {
\param[in] further_back an even earlier time stamp
\return elapsed seconds and fractions of a second
\see Fl::seconds_since(Fl_Timestamp& then), Fl::now()
\see Fl::seconds_since(Fl_Timestamp& then) \see Fl::now()
*/
double Fl::seconds_between(Fl_Timestamp& back, Fl_Timestamp& further_back) {
return double((back.sec - further_back.sec) + (back.usec - further_back.usec) / 1000000.);
@ -115,7 +120,7 @@ double Fl::seconds_between(Fl_Timestamp& back, Fl_Timestamp& further_back) {
\param[in] then a previously taken time stamp
\return elapsed ticks in 60th of a second
\see Fl::ticks_between(Fl_Timestamp& back, Fl_Timestamp& further_back), Fl::now()
\see Fl::ticks_between(Fl_Timestamp& back, Fl_Timestamp& further_back) \see Fl::now()
*/
long Fl::ticks_since(Fl_Timestamp& then) {
Fl_Timestamp ts_now = Fl::now();
@ -129,7 +134,7 @@ long Fl::ticks_since(Fl_Timestamp& then) {
\param[in] further_back an even earlier time stamp
\return elapsed ticks in 60th of a second
\see Fl::ticks_since(Fl_Timestamp& then), Fl::now()
\see Fl::ticks_since(Fl_Timestamp& then) \see Fl::now()
*/
long Fl::ticks_between(Fl_Timestamp& back, Fl_Timestamp& further_back) {
return (back.sec-further_back.sec)*60 + (back.usec-further_back.usec)/16666;