Fix a hang on address sanitized (ASAN) builds of R. Issue #16, PR #17
The run_now() function now takes a timeoutSecs argument. If no tasks are ready to run at the time run_now(timeoutSecs) is invoked, we will wait up to timeoutSecs for one to become ready. The default value of 0 means run_now() will return immediately if no tasks are ready, which is the same behavior as in previous releases. PR #19
The run_now() function used to return only when it was unable to find any more tasks that were due. This means that if tasks were being scheduled at an interval faster than the tasks are executed, run_now() would never return. This release changes that behavior so that a timestamp is taken as run_now() begins executing, and only tasks whose timestamps are earlier or equal to it are run. PR #18
Fix compilation errors on Solaris. Reported by Brian Ripley. PR #20
Fix a hang on Fedora 25+ which prevented the package from being installed successfully. Reported by @lepennec. Issue #7, PR #10
Fixed issue #12: When an exception occurred in a callback function, it would cause future callbacks to not execute. PR #13
Added next_op_secs() function to report the number of seconds before the next scheduled operation. PR #15
Add loop_empty() function, which returns TRUE if there are currently no callbacks that are scheduled to execute in the present or future.
On POSIX platforms, fix an issue where socket connections hang when written to/read from while a later callback is scheduled. The fix required stopping the input handler from being called in several spurious situations: 1) when callbacks are already being run, 2) when R code is busy executing (we used to try as often as possible, now we space it out a bit), and 3) when all the scheduled callbacks are in the future. To accomplish this, we use a background thread that acts like a timer to poke the file descriptor whenever the input handler needs to be run–similar to what we already do for Windows. Issue #4
On all platforms, don’t invoke callbacks if callbacks are already being invoked (unless explicitly requested by a caller to run_now()).
Initial release.