74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
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#pragma once
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#include <cstddef>
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#include <cstdint>
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#include <limits> // std::numeric_limits
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#include <new>
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#include <utility>
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namespace ipc {
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// types
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using byte_t = std::uint8_t;
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template <std::size_t N>
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struct uint;
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template <> struct uint<8 > { using type = std::uint8_t ; };
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template <> struct uint<16> { using type = std::uint16_t; };
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template <> struct uint<32> { using type = std::uint32_t; };
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template <> struct uint<64> { using type = std::uint64_t; };
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template <std::size_t N>
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using uint_t = typename uint<N>::type;
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// constants
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enum : std::uint32_t {
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invalid_value = (std::numeric_limits<std::uint32_t>::max)(),
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default_timeout = 100, // ms
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};
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enum : std::size_t {
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data_length = 64,
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large_msg_limit = data_length,
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large_msg_align = 1024,
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large_msg_cache = 32,
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};
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enum class relat { // multiplicity of the relationship
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single,
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multi
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};
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enum class trans { // transmission
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unicast,
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broadcast
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};
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// producer-consumer policy flag
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template <relat Rp, relat Rc, trans Ts>
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struct wr {};
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template <typename WR>
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struct relat_trait;
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template <relat Rp, relat Rc, trans Ts>
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struct relat_trait<wr<Rp, Rc, Ts>> {
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constexpr static bool is_multi_producer = (Rp == relat::multi);
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constexpr static bool is_multi_consumer = (Rc == relat::multi);
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constexpr static bool is_broadcast = (Ts == trans::broadcast);
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};
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template <template <typename> class Policy, typename Flag>
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struct relat_trait<Policy<Flag>> : relat_trait<Flag> {};
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// the prefix tag of a channel
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struct prefix {
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char const *str;
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};
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} // namespace ipc
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