path: root/src/time/timer_delete.c
AgeCommit message (Collapse)AuthorLines
2011-04-09greatly improve SIGEV_THREAD timersRich Felker-1/+6
calling pthread_exit from, or pthread_cancel on, the timer callback thread will no longer destroy the timer.
2011-04-06fix signal-based timers with null sigevent argumentRich Felker-3/+2
since timer_create is no longer allocating a structure for the timer_t and simply using the kernel timer id, it was impossible to specify the timer_t as the argument to the signal handler. the solution is to pass the null sigevent pointer on to the kernel, rather than filling it in userspace, so that the kernel does the right thing. however, that precludes the clever timerid-versus-threadid encoding we were doing. instead, just assume timerids are below 1M and thread pointers are above 1M. (in perspective: timerids are sequentially allocated and seem limited to 32k, and thread pointers are at roughly 3G.)
2011-04-03revert to deleting kernel-level timer from cancellation handlerRich Felker-7/+3
this is necessary in order to avoid breaking timer_getoverrun in the last run of the timer event handler, if it has not yet finished.
2011-03-30avoid all malloc/free in timer creation/destructionRich Felker-6/+7
instead of allocating a userspace structure for signal-based timers, simply use the kernel timer id. we use the fact that thread pointers will always be zero in the low bit (actually more) to encode integer timerid values as pointers. also, this change ensures that the timer_destroy syscall has completed before the library timer_destroy function returns, in case it matters.
2011-03-29reorder timer initialization so that timer_create does not depend on freeRich Felker-1/+1
this allows small programs which only create times, but never delete them, to use simple_malloc instead of the full malloc.
2011-03-29implement POSIX timersRich Felker-0/+12
this implementation is superior to the glibc/nptl implementation, in that it gives true realtime behavior. there is no risk of timer expiration events being lost due to failed thread creation or failed malloc, because the thread is created as time creation time, and reused until the timer is deleted.