This was not working at all since the release of vibe-core due to dependencies on other parts of vibe.d. The unit test has now been moved out of the template class, so that it is actually run.
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.
Uninitialized YieldLock values can happen in various ways, dispite the default constructor being disabled. If any such value got destroyed, it would lead to a negative lock count. Since this is handled properly now, the default constructor is also enabled in this commit.
- Deprecates Format.decodeSegment (returning a range of GemericPath.Segment) and added decodeSingleSegment instead, which returns a string instead.
- Adds Format.encodeSegment to encode a single path segment
Instead of asyncWork, now uses a worker task directly and signals the finalization of the result using message passing. This avoids the roundtrip required to return the task handle, as well as the heap allocated result buffer of Future!T.
Instead of starting at zero, start at the current file size. This offset
is stored in FileStream. It is only an approximation because concurrent
writes could advance the file without FileStream's knowledge.
Add a test that shows that the offset is approximated as expected and that
appending to an existing file works, too.
This is also a regression test which shows that appending to an existing
file works as expected. See vibe-d/eventcore#115.
