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Checks to ensure transactions execute in the context of their origina…
…ting stores (#4297) * Introduce `id_dispenser` class * Checks to ensure transactions execute in the context of their originating stores * Remove legacy `nano::wallets::split_if_needed`
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| Original file line number | Diff line number | Diff line change |
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@@ -37,6 +37,7 @@ add_library( | |
| epoch.cpp | ||
| errors.hpp | ||
| errors.cpp | ||
| id_dispenser.hpp | ||
| ipc.hpp | ||
| ipc.cpp | ||
| ipc_client.hpp | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,62 @@ | ||
| #pragma once | ||
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| #include <atomic> | ||
| #include <random> | ||
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| namespace nano | ||
| { | ||
| class id_dispenser | ||
| { | ||
| public: | ||
| enum class mode | ||
| { | ||
| sequential, | ||
| random, | ||
| }; | ||
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| // Using pointer type for prettier and more concise output in logs (hex) | ||
| using id_t = void *; | ||
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| public: | ||
| explicit id_dispenser (mode mode = mode::random) : | ||
| mode_m{ mode } | ||
| { | ||
| } | ||
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| id_t next_id () | ||
| { | ||
| switch (mode_m) | ||
| { | ||
| case mode::sequential: | ||
| return reinterpret_cast<id_t> (current_id_m.fetch_add (1)); | ||
| case mode::random: | ||
| auto value = get_dist () (get_rng ()); | ||
| if (value < min_m) | ||
| { | ||
| value += min_m; | ||
| } | ||
| return reinterpret_cast<id_t> (value); | ||
| } | ||
| return 0; | ||
| } | ||
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| private: | ||
| // Avoid IDs with leading 0s for nicer output in logs | ||
| static constexpr uint64_t min_m{ 0x1000000000000000 }; | ||
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| mode mode_m; | ||
| std::atomic<uint64_t> current_id_m{ min_m }; | ||
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| static std::mt19937 & get_rng () | ||
| { | ||
| static thread_local std::mt19937 rng{ std::random_device{}() }; | ||
| return rng; | ||
| } | ||
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| static std::uniform_int_distribution<uint64_t> & get_dist () | ||
| { | ||
| static thread_local std::uniform_int_distribution<uint64_t> dist; | ||
| return dist; | ||
| } | ||
| }; | ||
| } |
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