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/*
* Copyright 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "os/thread.h"
#include <fcntl.h>
#include <sys/syscall.h>
#include <unistd.h>
#include <cerrno>
#include <cstring>
#include "os/log.h"
namespace bluetooth {
namespace os {
namespace {
constexpr int kRealTimeFifoSchedulingPriority = 1;
}
Thread::Thread(const std::string& name, const Priority priority)
: name_(name), reactor_(), running_thread_(&Thread::run, this, priority) {}
void Thread::run(Priority priority) {
if (priority == Priority::REAL_TIME) {
struct sched_param rt_params = {.sched_priority = kRealTimeFifoSchedulingPriority};
auto linux_tid = static_cast<pid_t>(syscall(SYS_gettid));
int rc;
RUN_NO_INTR(rc = sched_setscheduler(linux_tid, SCHED_FIFO, &rt_params));
if (rc != 0) {
LOG_ERROR("unable to set SCHED_FIFO priority: %s", strerror(errno));
}
}
reactor_.Run();
}
Thread::~Thread() {
Stop();
}
bool Thread::Stop() {
std::lock_guard<std::mutex> lock(mutex_);
ASSERT(std::this_thread::get_id() != running_thread_.get_id());
if (!running_thread_.joinable()) {
return false;
}
reactor_.Stop();
running_thread_.join();
return true;
}
bool Thread::IsSameThread() const {
return std::this_thread::get_id() == running_thread_.get_id();
}
Reactor* Thread::GetReactor() const {
return &reactor_;
}
std::string Thread::GetThreadName() const {
return name_;
}
std::string Thread::ToString() const {
return "Thread " + name_;
}
} // namespace os
} // namespace bluetooth
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