#26449 [Fbk->Opn]: usleep doesnt work correctly

ID: 26449 User updated by: marcus at quintic dot co dot uk Reported By: marcus at quintic dot co dot uk -Status: Feedback +Status: Open Bug Type: Unknown/Other Function Operating System: Windows XP PHP Version: 4.3.4 New Comment: Ok - I wont be able to check until after the weekend. I tried the output of <?php echo time(); usleep(10000000); echo time(); ?> earlier (before submitting the bug) and it comes back with the same time twice so unless var_dump gives you any extra info that will help.... Previous Comments: ------------------------------------------------------------------------ [2003-11-28 14:01:25] iliaa@php.net Try running the following: php -r " var_dump(time(), usleep(10000000), time()); " ------------------------------------------------------------------------ [2003-11-28 11:25:36] marcus at quintic dot co dot uk Doesnt work. I only put 100000 as an example (admittedly too small to notice if you're watching it), I should have put 10000000 or something - put it in a loop that repeats a few thousand times and it still doesnt do anything. ------------------------------------------------------------------------ [2003-11-28 11:17:28] iliaa@php.net Try making the delay longer, usleep(100000); will sleep for 1/10 of a second and is very hard to notice. ------------------------------------------------------------------------ [2003-11-28 10:54:52] marcus at quintic dot co dot uk Description: ------------ (I know the manual says it doesnt work, but it should work because the Sleep function in windows works fine) usleep doesnt work on windows XP (on all windows platforms?). For some reason usleep returns immediately on windows and there doesnt seem to be any way in php of delaying for less than a second without chewing cpu cycles. Having looked at the code behind the usleep function all it does is call the win32 Sleep function which does work, so there must be a bug stopping this from being called. Reproduce code: --------------- <?php usleep(100000); ?> Expected result: ---------------- Should delay for 100000 microseconds. Actual result: -------------- Returns immediately with no delay. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=26449&edit=1