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Changed call_timeouts() and Fl::wait()/wait(double). The wait functions will now return immediately (do fl_wait(0,0)) if any timeouts were called in call_timeouts(). Motivation: An event loop like

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while (work_to_do) {
	work_some();
	Fl::check();
    } else {
	Fl::wait();
    }

    Suppose that a timeout sets the work_to_do flag, which is initially cleared.
    Fl::wait() will wait for this timeout, return, then expire the timeout and wait for user input.
    With the fix, it will work as expected.


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.0@669 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
gustavo
1999-08-22 23:31:21 +00:00
parent 1706466f04
commit 138c7287b2
1 changed files with 16 additions and 11 deletions
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src/Fl.cxx
+16 -11
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@@ -1,5 +1,6 @@
#include <stdio.h>
// //
// "$Id: Fl.cxx,v 1.24.2.11 1999/07/27 17:24:13 bill Exp $" // "$Id: Fl.cxx,v 1.24.2.12 1999/08/22 23:31:21 gustavo Exp $"
// //
// Main event handling code for the Fast Light Tool Kit (FLTK). // Main event handling code for the Fast Light Tool Kit (FLTK).
// //
@@ -111,17 +112,19 @@ void Fl::remove_timeout(void (*cb)(void *), void *v) {
numtimeouts = j; numtimeouts = j;
} }
static void call_timeouts() { static int call_timeouts() {
int expired = 0;
while (numtimeouts) { while (numtimeouts) {
if (timeout[0].time > 0) break; if (timeout[0].time > 0) break;
// we must remove timeout from array before doing the callback: // we must remove timeout from array before doing the callback:
void (*cb)(void*) = timeout[0].cb; void (*cb)(void*) = timeout[0].cb;
void *arg = timeout[0].arg; void *arg = timeout[0].arg;
numtimeouts--; numtimeouts--; expired++;
if (numtimeouts) memmove(timeout, timeout+1, numtimeouts*sizeof(Timeout)); if (numtimeouts) memmove(timeout, timeout+1, numtimeouts*sizeof(Timeout));
// now it is safe for the callback to do add_timeout: // now it is safe for the callback to do add_timeout:
cb(arg); cb(arg);
} }
return expired;
} }
void Fl::flush() { void Fl::flush() {
@@ -154,7 +157,7 @@ static int initclock; // if false we didn't call fl_elapsed() last time
#endif #endif
// fl_elapsed must return the amount of time since the last time it was // fl_elapsed must return the amount of time since the last time it was
// called. To reduce the number of system calls the to get the // called. To reduce the number of system calls to get the
// current time, the "initclock" symbol is turned on by an indefinite // current time, the "initclock" symbol is turned on by an indefinite
// wait. This should then reset the measured-from time and return zero // wait. This should then reset the measured-from time and return zero
static double fl_elapsed() { static double fl_elapsed() {
@@ -204,14 +207,15 @@ static void callidle() {
int Fl::wait() { int Fl::wait() {
callidle(); callidle();
if (numtimeouts) {fl_elapsed(); call_timeouts();} int expired = 0;
if (numtimeouts) {fl_elapsed(); expired = call_timeouts();}
flush(); flush();
if (!Fl_X::first) return 0; // no windows if (!Fl_X::first) return 0; // no windows
if (idle && !in_idle) if ((idle && !in_idle) || expired) {
fl_wait(1,0.0); fl_wait(1,0.0);
else if (numtimeouts) } else if (numtimeouts) {
fl_wait(1, timeout[0].time); fl_wait(1, timeout[0].time);
else { } else {
initclock = 0; initclock = 0;
fl_wait(0,0); fl_wait(0,0);
} }
@@ -220,9 +224,10 @@ int Fl::wait() {
double Fl::wait(double time) { double Fl::wait(double time) {
callidle(); callidle();
if (numtimeouts) {time -= fl_elapsed(); call_timeouts();} int expired = 0;
if (numtimeouts) {time -= fl_elapsed(); expired = call_timeouts();}
flush(); flush();
double wait_time = idle && !in_idle ? 0.0 : time; double wait_time = (idle && !in_idle) || expired ? 0.0 : time;
if (numtimeouts && timeout[0].time < wait_time) wait_time = timeout[0].time; if (numtimeouts && timeout[0].time < wait_time) wait_time = timeout[0].time;
fl_wait(1, wait_time); fl_wait(1, wait_time);
return time - fl_elapsed(); return time - fl_elapsed();
@@ -695,5 +700,5 @@ int fl_old_shortcut(const char* s) {
} }
// //
// End of "$Id: Fl.cxx,v 1.24.2.11 1999/07/27 17:24:13 bill Exp $". // End of "$Id: Fl.cxx,v 1.24.2.12 1999/08/22 23:31:21 gustavo Exp $".
// //