Atmosphere/stratosphere/libstratosphere/source/waitablemanager.cpp

106 lines
3.6 KiB
C++

/*
* Copyright (c) 2018 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <switch.h>
#include <algorithm>
#include <functional>
#include <mutex>
#include <stratosphere/waitablemanager.hpp>
void WaitableManager::add_waitable(IWaitable *waitable) {
std::scoped_lock lk{this->lock};
this->to_add_waitables.push_back(waitable);
waitable->set_manager(this);
this->has_new_items = true;
}
void WaitableManager::process_internal(bool break_on_timeout) {
std::vector<Handle> handles;
int handle_index = 0;
Result rc;
while (1) {
/* Add new items, if relevant. */
if (this->has_new_items) {
std::scoped_lock lk{this->lock};
this->waitables.insert(this->waitables.end(), this->to_add_waitables.begin(), this->to_add_waitables.end());
this->to_add_waitables.clear();
this->has_new_items = false;
}
/* Sort waitables by priority. */
std::sort(this->waitables.begin(), this->waitables.end(), IWaitable::compare);
/* Copy out handles. */
handles.resize(this->waitables.size());
std::transform(this->waitables.begin(), this->waitables.end(), handles.begin(), [](IWaitable *w) { return w->get_handle(); });
rc = svcWaitSynchronization(&handle_index, handles.data(), this->waitables.size(), this->timeout);
if (R_SUCCEEDED(rc)) {
/* Handle a signaled waitable. */
/* TODO: What timeout should be passed here? */
rc = this->waitables[handle_index]->handle_signaled(0);
std::for_each(waitables.begin(), waitables.begin() + handle_index, std::mem_fn(&IWaitable::update_priority));
} else if (rc == 0xEA01) {
/* Timeout. */
std::for_each(waitables.begin(), waitables.end(), std::mem_fn(&IWaitable::update_priority));
if (break_on_timeout) {
return;
}
} else if (rc != 0xF601) {
/* TODO: Panic. When can this happen? */
}
if (rc == 0xF601) {
/* handles[handle_index] was closed! */
/* Close the handle. */
svcCloseHandle(handles[handle_index]);
IWaitable *to_delete = this->waitables[handle_index];
/* If relevant, remove from waitables. */
this->waitables.erase(this->waitables.begin() + handle_index);
/* Delete it. */
delete to_delete;
std::for_each(waitables.begin(), waitables.begin() + handle_index, std::mem_fn(&IWaitable::update_priority));
}
/* Do deferred callback for each waitable. */
for (auto & waitable : this->waitables) {
if (waitable->get_deferred()) {
waitable->handle_deferred();
}
}
}
}
void WaitableManager::process() {
WaitableManager::process_internal(false);
}
void WaitableManager::process_until_timeout() {
WaitableManager::process_internal(true);
}