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#ifndef CERT_TRANS_UTIL_THREAD_POOL_H_
#define CERT_TRANS_UTIL_THREAD_POOL_H_
#include <chrono>
#include <functional>
#include <map>
#include <memory>
#include "base/macros.h"
#include "util/executor.h"
namespace cert_trans {
// Provides a fixed size thread pool to run closures on. The pool is
// sized according to the number of cores in the system.
class ThreadPool : public util::Executor {
public:
// Creates the threads.
ThreadPool();
// Creates the threads.
ThreadPool(size_t num_threads);
// The destructor will wait for any outstanding closures to finish.
~ThreadPool();
// Arranges for "closure" to be called in the thread pool. The
// function must not be empty.
void Add(const std::function<void()>& closure) override;
void Delay(const std::chrono::duration<double>& delay,
util::Task* task) override;
private:
class Impl;
const std::unique_ptr<Impl> impl_;
DISALLOW_COPY_AND_ASSIGN(ThreadPool);
};
} // namespace cert_trans
#endif // CERT_TRANS_UTIL_THREAD_POOL_H_
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