src/worker.cpp
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #include "DetourModKit/worker.hpp" | ||
| 2 | #include "DetourModKit/diagnostics.hpp" | ||
| 3 | #include "DetourModKit/logger.hpp" | ||
| 4 | #include "platform.hpp" | ||
| 5 | |||
| 6 | #include <utility> | ||
| 7 | |||
| 8 | namespace DetourModKit | ||
| 9 | { | ||
| 10 |
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432 | StoppableWorker::StoppableWorker(std::string_view name, std::function<void(std::stop_token)> body) : m_name(name) |
| 11 | { | ||
| 12 |
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144 | if (!body) |
| 13 | { | ||
| 14 |
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1 | Logger::get_instance().error("StoppableWorker '{}': empty body; no thread started.", m_name); |
| 15 | 1 | m_joined.store(true, std::memory_order_release); | |
| 16 | 1 | return; | |
| 17 | } | ||
| 18 | |||
| 19 | 143 | m_thread = std::jthread( | |
| 20 |
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286 | [fn = std::move(body), label = m_name](std::stop_token st) |
| 21 | { | ||
| 22 | try | ||
| 23 | { | ||
| 24 |
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145 | fn(st); |
| 25 | } | ||
| 26 |
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2 | catch (const std::exception &e) |
| 27 | { | ||
| 28 |
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1 | Logger::get_instance().error("StoppableWorker '{}': unhandled exception: {}", label, e.what()); |
| 29 | 1 | } | |
| 30 | 1 | catch (...) | |
| 31 | { | ||
| 32 |
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1 | Logger::get_instance().error("StoppableWorker '{}': unknown exception escaped body.", label); |
| 33 | 1 | } | |
| 34 |
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286 | }); |
| 35 | |||
| 36 | 143 | m_stop_source = m_thread.get_stop_source(); | |
| 37 | |||
| 38 | // Publish liveness through an atomic once both the thread handle and stop source are initialized. | ||
| 39 | // is_running() reads only this snapshot, and request_stop() signals m_stop_source, so neither path touches the | ||
| 40 | // std::jthread handle concurrently with shutdown()'s join()/detach(). | ||
| 41 | 143 | m_started.store(true, std::memory_order_release); | |
| 42 | |||
| 43 |
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143 | Logger::get_instance().debug("StoppableWorker '{}' started.", m_name); |
| 44 | ✗ | } | |
| 45 | |||
| 46 | 140 | StoppableWorker::~StoppableWorker() noexcept | |
| 47 | { | ||
| 48 | 140 | shutdown(); | |
| 49 | 140 | } | |
| 50 | |||
| 51 | 58072 | void StoppableWorker::request_stop() noexcept | |
| 52 | { | ||
| 53 | // Gate on the liveness atomics rather than m_thread.joinable(): a concurrent shutdown() may be inside join()/ | ||
| 54 | // detach(), which mutate the handle. Signal the copied stop_source so this path never touches m_thread. | ||
| 55 |
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58072 | if (m_started.load(std::memory_order_acquire) && !m_joined.load(std::memory_order_acquire)) |
| 56 | { | ||
| 57 | 1036 | m_stop_source.request_stop(); | |
| 58 | } | ||
| 59 | 59284 | } | |
| 60 | |||
| 61 | 56225 | bool StoppableWorker::is_running() const noexcept | |
| 62 | { | ||
| 63 |
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56225 | return m_started.load(std::memory_order_acquire) && !m_joined.load(std::memory_order_acquire); |
| 64 | } | ||
| 65 | |||
| 66 | 275 | void StoppableWorker::shutdown() noexcept | |
| 67 | { | ||
| 68 | 275 | bool expected = false; | |
| 69 |
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275 | if (!m_joined.compare_exchange_strong(expected, true, std::memory_order_acq_rel)) |
| 70 | { | ||
| 71 | 132 | return; | |
| 72 | } | ||
| 73 | |||
| 74 |
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143 | if (!m_thread.joinable()) |
| 75 | { | ||
| 76 | ✗ | return; | |
| 77 | } | ||
| 78 | |||
| 79 | 143 | m_stop_source.request_stop(); | |
| 80 | |||
| 81 |
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143 | if (detail::is_loader_lock_held()) |
| 82 | { | ||
| 83 | ✗ | detail::pin_current_module(); | |
| 84 | ✗ | m_thread.detach(); | |
| 85 | ✗ | DetourModKit::Diagnostics::record_intentional_leak(DetourModKit::Diagnostics::LeakSubsystem::Worker); | |
| 86 | ✗ | return; | |
| 87 | } | ||
| 88 | |||
| 89 | 143 | m_thread.join(); | |
| 90 | } | ||
| 91 | } // namespace DetourModKit | ||
| 92 |