debian-packages/vibe-core
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Make std.concurrency parallelism primitive configurable.

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Backport from mainline vibe.d.
This commit is contained in:
Sönke Ludwig 2016-10-04 17:53:20 +02:00
parent 30e08fd205
commit 6a1f2ddee3
1 changed files with 36 additions and 1 deletions
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37
source/vibe/core/concurrency.d
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@ -1196,6 +1196,23 @@ unittest {
/* std.concurrency compatible interface for message passing */
/******************************************************************************/
enum ConcurrencyPrimitive {
task, // Task run in the caller's thread (`runTask`)
workerTask, // Task run in the worker thread pool (`runWorkerTask`)
thread // Separate thread
}
/** Sets the concurrency primitive to use for `śtd.concurrency.spawn()`.
By default, `spawn()` will start a thread for each call, mimicking the
default behavior of `std.concurrency`.
*/
void setConcurrencyPrimitive(ConcurrencyPrimitive primitive)
{
import core.atomic : atomicStore;
atomicStore(st_concurrencyPrimitive, primitive);
}
void send(ARGS...)(Task task, ARGS args) { std.concurrency.send(task.tidInfo.ident, args); }
void prioritySend(ARGS...)(Task task, ARGS args) { std.concurrency.prioritySend(task.tidInfo.ident, args); }
@ -1205,7 +1222,23 @@ package class VibedScheduler : Scheduler {
import vibe.core.sync;
override void start(void delegate() op) { op(); }
override void spawn(void delegate() op) { runTask(op); }
override void spawn(void delegate() op) {
import core.thread : Thread;
final switch (st_concurrencyPrimitive) with (ConcurrencyPrimitive) {
case task: runTask(op); break;
case workerTask:
static void wrapper(shared(void delegate()) op) {
(cast(void delegate())op)();
}
runWorkerTask(&wrapper, cast(shared)op);
break;
case thread:
auto t = new Thread(op);
t.start();
break;
}
}
override void yield() {}
override @property ref ThreadInfo thisInfo(){ return Task.getThis().tidInfo; }
override TaskCondition newCondition(Mutex m)
@ -1215,3 +1248,5 @@ package class VibedScheduler : Scheduler {
} catch(Exception e) { assert(false, e.msg); }
}
}
private shared ConcurrencyPrimitive st_concurrencyPrimitive = ConcurrencyPrimitive.thread;