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/*
* Copyright 2011-2016 Blender Foundation
*
* 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 "util/util_thread.h"
#include "util/util_system.h"
#include "util/util_windows.h"
CCL_NAMESPACE_BEGIN
thread::thread(function<void(void)> run_cb, int group)
: run_cb_(run_cb),
joined_(false),
group_(group)
{
pthread_create(&pthread_id_, NULL, run, (void*)this);
}
thread::~thread()
{
if(!joined_) {
join();
}
}
void *thread::run(void *arg)
{
thread *self = (thread*)(arg);
if(self->group_ != -1) {
#ifdef _WIN32
HANDLE thread_handle = GetCurrentThread();
GROUP_AFFINITY group_affinity = { 0 };
int num_threads = system_cpu_group_thread_count(self->group_);
group_affinity.Group = self->group_;
group_affinity.Mask = (num_threads == 64)
? -1
: (1ull << num_threads) - 1;
if(SetThreadGroupAffinity(thread_handle, &group_affinity, NULL) == 0) {
fprintf(stderr, "Error setting thread affinity.\n");
}
#endif
}
self->run_cb_();
return NULL;
}
bool thread::join()
{
joined_ = true;
return pthread_join(pthread_id_, NULL) == 0;
}
CCL_NAMESPACE_END
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