Aegisub/libaegisub/osx/dispatch.mm

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// Copyright (c) 2014, Thomas Goyne <plorkyeran@aegisub.org>
//
// Permission to use, copy, modify, and distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
// Aegisub Project http://www.aegisub.org/
#include "libaegisub/dispatch.h"
#include <dispatch/dispatch.h>
namespace {
std::function<void (agi::dispatch::Thunk)> invoke_main;
struct GCDQueue : agi::dispatch::Queue {
dispatch_queue_t queue;
GCDQueue(dispatch_queue_t queue) : queue(queue) { }
void DoInvoke(agi::dispatch::Thunk) override final { }
};
struct OwningQueue final : GCDQueue {
using GCDQueue::GCDQueue;
~OwningQueue() { dispatch_release(queue); }
};
}
namespace agi { namespace dispatch {
void Init(std::function<void (Thunk)> invoke_main) {
::invoke_main = std::move(invoke_main);
}
void Queue::Async(Thunk thunk) {
dispatch_async(static_cast<GCDQueue *>(this)->queue, ^{
try {
thunk();
}
catch (...) {
auto e = std::current_exception();
invoke_main([=] { std::rethrow_exception(e); });
}
});
}
void Queue::Sync(Thunk thunk) {
std::exception_ptr e;
std::exception_ptr *e_ptr = &e;
dispatch_sync(static_cast<GCDQueue *>(this)->queue, ^{
try {
thunk();
}
catch (...) {
*e_ptr = std::current_exception();
}
});
if (e) std::rethrow_exception(e);
}
Queue& Main() {
static GCDQueue q(dispatch_get_main_queue());
return q;
}
Queue& Background() {
static GCDQueue q(dispatch_get_global_queue(0, DISPATCH_QUEUE_PRIORITY_DEFAULT));
return q;
}
std::unique_ptr<Queue> Create() {
return std::unique_ptr<Queue>(new OwningQueue(dispatch_queue_create("Aegisub worker queue",
DISPATCH_QUEUE_SERIAL)));
}
} }