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51 lines
977 B
C++
51 lines
977 B
C++
/*++
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Copyright (c) 2011 Microsoft Corporation
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Module Name:
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cooperate.cpp
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Abstract:
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Cooperation support
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Author:
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Leonardo (leonardo) 2011-05-17
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Notes:
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--*/
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#ifndef SINGLE_THREAD
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#include "util/cooperate.h"
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#include "util/trace.h"
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#include "util/debug.h"
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#include <atomic>
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#include <mutex>
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#include <thread>
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static std::mutex lock;
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static std::atomic<std::thread::id> owner_thread;
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bool cooperation_ctx::g_cooperate = false;
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void cooperation_ctx::checkpoint(char const * task) {
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SASSERT(cooperation_ctx::enabled());
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std::thread::id tid = std::this_thread::get_id();
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if (owner_thread == tid) {
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owner_thread = std::thread::id();
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lock.unlock();
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}
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// this critical section is used to force the owner thread to give a chance to
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// another thread to get the lock
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std::this_thread::yield();
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lock.lock();
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TRACE("cooperate_detail", tout << task << ", tid: " << tid << "\n";);
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owner_thread = tid;
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}
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#endif
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