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#include "HalideBuffer.h"
#include "HalideRuntime.h"
#include <algorithm>
#include <atomic>
#include <stdio.h>
#include <stdlib.h>
#include "variable_num_threads.h"
std::atomic<bool> stop{false};
std::atomic<int> max_threads{1};
using namespace Halide::Runtime;
void mess_with_num_threads(void *) {
while (!stop) {
halide_set_num_threads((rand() % max_threads) + 1);
}
}
int main(int argc, char **argv) {
halide_set_num_threads(1);
// In one thread we'll run a job with lots of nested parallelism,
// and in another we'll mess with the number of threads we want
// running. The intent is to hunt for deadlocks.
halide_thread *t = halide_spawn_thread(&mess_with_num_threads, nullptr);
Buffer<float, 2> out(64, 64);
for (int i = 0; i < 1000; i++) {
// The number of threads will oscillate randomly, but the range
// will slowly ramp up and back down so you can watch it
// working in a process monitor.
max_threads = 1 + std::min(i, 1000 - i) / 50;
int ret = variable_num_threads(out);
if (ret) {
printf("Non zero exit code: %d\n", ret);
return 1;
}
}
stop = true;
halide_join_thread(t);
printf("Success!\n");
return 0;
}
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