Many places around were re-inventing logException with varying level of success.
In addition, the full error is now printed as a diagnostic instead of debug.
This is more in line with the description of `LogLevel.diagnostic`
("Extended user information (e.g. for more detailed error information)"),
as opposed to the one of `LogLevel.debug_`
("Developer information useful for algorithm debugging").
1. Removes the marker task used by schedule() and instead limits the number of task resumptions to the initial length of the task queue
2. Assigns a static and a dynamic priority to each task. The dynamic priority starts with the same value as the static priority and gets incremented by the static priority each time the task gets overtaken by a higher priority task, eventually leading to the task becoming the highest priority (unless the static priority is zero). Tasks with a higher dynamic priority generally take precedence, unless the concurrency exceeds 10 scheduled tasks, in which case the front of the queue is scheduled in normal FIFO order.
Makes sure that the task finalization finishes (including notifying possibly multiple joiners) before the fiber yields, because it won't be resumed by the scheduler before the next task gets assigned to the fiber.
- Task.join and Task.interrupt are now thread-safe
- TaskFiber.task returns Task.init if no task is running (avoids bogus resumes of the TaskFiber by the scheduler)
To enable thread-safe join/interrupt, the task counter is now stored together with the necessary flags within a single shared ulong that is manipulated atomically.
Fixes a discrepancy in TaskFiberQueue between empty and length, which causes process() to never return, thus processing events without timeout indefinitely.
The status of the task was erroneously reported as not running until the task was actually executed for the first time (which only happens after the yield lock has been lifted).
Previously the task was only removed if switchTo was called from another task. Now it also gets removed when switchTo (e.g. due to a runTask() call) gets called form outside of a task.
Removes some invalid safety annotations and adds a workaround for a starvation issue in Task.join() across threads boundaries. This is still not thread-safe, but now has a safety-net and is documented, so that it doesn't get lost.
In situations where no events were involved in an multi-task scenario, the old behavior could lead to the process to starve or hang until an event arrived.
- the initial task yield() now is done in an uninterruptible way
- switchToTask now handles switching to an already scheduled task gracefully
- TaskScheduler.hibernate() now properly blocks when called form outside of a task
- added yieldUninterruptible()
- Moves a lot of stuff from vibe.core.core to vibe.core.task
- Introduces TaskScheduler to unify the scheduling process
- Refines how tasks are scheduled and processed (can push to the front of the task queue and uses a marker task to keep track of the spot up to which to process)
- Start to add proper support for task interrupts and timeouts by properly cancelling in-flight async operations
- Work on ManualEvent - still not functional for the shared case
- Implement proper IP address parsing in NetworkAddress
The library is able to support simple TCP servers in the current state. The API is still mostly compatible with mainline vibe.d, but the driver systen has been replaced by the eventcore library and sockets/files/timers/... are now structs with automatic reference counting instead of GC collected classes. The stream interfaces have been removed for now.
