thread_policy.h

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#pragma once
 
#include <mutex>
#include <shared_mutex>
 
namespace cppfig {
 
struct SingleThreadedPolicy {
    struct mutex_type {           // NOLINT(readability-identifier-naming)
        void lock() { }           // NOLINT(readability-identifier-naming) LCOV_EXCL_LINE
        void unlock() { }         // NOLINT(readability-identifier-naming) LCOV_EXCL_LINE
        void lock_shared() { }    // NOLINT(readability-identifier-naming) LCOV_EXCL_LINE
        void unlock_shared() { }  // NOLINT(readability-identifier-naming) LCOV_EXCL_LINE
    };
 
    struct shared_lock {  // NOLINT(readability-identifier-naming)
        explicit shared_lock(mutex_type& /*unused*/) { }
        ~shared_lock() = default;
 
        shared_lock(const shared_lock&) = delete;
        auto operator=(const shared_lock&) -> shared_lock& = delete;
        shared_lock(shared_lock&&) = delete;
        auto operator=(shared_lock&&) -> shared_lock& = delete;
    };
 
    struct unique_lock {  // NOLINT(readability-identifier-naming)
        explicit unique_lock(mutex_type& /*unused*/) { }
        ~unique_lock() = default;
 
        unique_lock(const unique_lock&) = delete;
        auto operator=(const unique_lock&) -> unique_lock& = delete;
        unique_lock(unique_lock&&) = delete;
        auto operator=(unique_lock&&) -> unique_lock& = delete;
    };
};
 
struct MultiThreadedPolicy {
    using mutex_type = std::shared_mutex;
 
    using shared_lock = std::shared_lock<std::shared_mutex>;
 
    using unique_lock = std::unique_lock<std::shared_mutex>;
};
 
}  // namespace cppfig