141 lines
2.7 KiB
C++
141 lines
2.7 KiB
C++
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// IsThread.cpp
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// Implements the cIsThread class representing an OS-independent wrapper for a class that implements a thread.
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// This class will eventually suupersede the old cThread class
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#include "Globals.h"
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#include "IsThread.h"
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#if defined(_MSC_VER) && defined(_DEBUG)
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// Code adapted from MSDN: https://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx
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const DWORD MS_VC_EXCEPTION = 0x406D1388;
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#pragma pack(push, 8)
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struct THREADNAME_INFO
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{
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DWORD dwType; // Must be 0x1000.
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LPCSTR szName; // Pointer to name (in user addr space).
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DWORD dwThreadID; // Thread ID (-1 = caller thread).
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DWORD dwFlags; // Reserved for future use, must be zero.
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};
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#pragma pack(pop)
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/** Sets the name of a thread with the specified ID
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(When in MSVC, the debugger provides "thread naming" by catching special exceptions)
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*/
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static void SetThreadName(std::thread * a_Thread, const char * a_ThreadName)
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{
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THREADNAME_INFO info { 0x1000, a_ThreadName, GetThreadId(a_Thread->native_handle()), 0 };
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__try
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{
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RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), (ULONG_PTR *)&info);
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}
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__except (EXCEPTION_EXECUTE_HANDLER)
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{
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}
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}
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#endif // _MSC_VER && _DEBUG
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////////////////////////////////////////////////////////////////////////////////
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// cIsThread:
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cIsThread::cIsThread(const AString & a_ThreadName) :
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m_ShouldTerminate(false),
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m_ThreadName(a_ThreadName)
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{
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}
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cIsThread::~cIsThread()
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{
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Stop();
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}
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void cIsThread::DoExecute(void)
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{
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m_evtStart.Wait();
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Execute();
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}
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bool cIsThread::Start(void)
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{
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try
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{
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// Initialize the thread:
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m_Thread = std::thread(&cIsThread::DoExecute, this);
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#if defined (_MSC_VER) && defined(_DEBUG)
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if (!m_ThreadName.empty())
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{
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SetThreadName(&m_Thread, m_ThreadName.c_str());
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}
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#endif
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// Notify the thread that initialization is complete and it can run its code safely:
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m_evtStart.Set();
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return true;
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}
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catch (const std::system_error & a_Exception)
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{
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LOGERROR("cIsThread::Start error %i: could not construct thread %s; %s", a_Exception.code().value(), m_ThreadName.c_str(), a_Exception.code().message().c_str());
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return false;
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}
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}
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void cIsThread::Stop(void)
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{
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m_ShouldTerminate = true;
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Wait();
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m_ShouldTerminate = false;
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}
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bool cIsThread::Wait(void)
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{
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LOGD("Waiting for thread %s to finish", m_ThreadName.c_str());
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if (m_Thread.joinable())
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{
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try
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{
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m_Thread.join();
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return true;
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}
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catch (const std::system_error & a_Exception)
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{
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LOGERROR("%s error %i: could not join thread %s; %s", __FUNCTION__, a_Exception.code().value(), m_ThreadName.c_str(), a_Exception.code().message().c_str());
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return false;
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}
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}
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LOGD("Thread %s finished", m_ThreadName.c_str());
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return true;
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}
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