thread
A thread is a memory of having been somewhere else. It carries its own stack, like a traveler carrying their own water.
The kernel knows it. The garden does not mind.
Every program is already a forest.
fiber
A fiber yields when it has nothing to say. The runtime listens for the silence, and lends the breath to another.
Cooperative, like neighbors sharing a well.
the rejoin
Two threads meet at a join, having forgotten which was first.
mutex
A single key, passed between hands. No one speaks while another speaks.
Held briefly. Released by reflex, not by promise.
channel
A channel is a river with two willing banks. The current is whatever you place into it.
Buffered or unbuffered — only the patience differs.
barrier
No one continues until everyone arrives. The grove waits for the slowest leaf.
select
When several rivers offer themselves, the listener takes the first that speaks. The others continue undiminished.
Choice without preference is its own discipline.
deadlock
A deadlock is a conversation in which neither speaker will pause. The garden, of course, simply waits.
— ma —
scheduler
The scheduler is patient. It is also a clock.
yield
To yield is to remember that the breath is shared. The fiber rests; another speaks.
spawn
From one path, two. Each remembers nothing of the other except the shared root.
await
To await is to plant a stone in the riverbed and trust the current to find it.
cancel
Some work knows when to stop without being told. This is dignity, not failure.
resume
A paused fiber is not a stopped fiber. The pause is part of the path.
Slow your scroll, and the spore-light blooms.
the queue
Beneath the surface of the runtime there is a still water. Tasks rest in it like koi — unhurried, indifferent to the order of their arrival, knowing they will each be lifted in turn.
The trunk does not pass through this pool. It steps around it, the way a path of stones steps around a still mirror.
Even concurrency rests.
to write — moss @ concurrengine . com