168 lines
3.4 KiB
C++
168 lines
3.4 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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// When in MSVC, the debugger provides "thread naming" by catching special exceptions. Interface here:
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#if defined(_MSC_VER) && defined(_DEBUG)
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//
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// Usage: SetThreadName (-1, "MainThread");
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//
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static void SetThreadName( DWORD dwThreadID, LPCSTR szThreadName)
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{
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struct
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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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} info;
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info.dwType = 0x1000;
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info.szName = szThreadName;
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info.dwThreadID = dwThreadID;
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info.dwFlags = 0;
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__try
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{
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RaiseException(0x406D1388, 0, sizeof(info) / sizeof(DWORD), (DWORD *)&info);
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}
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__except(EXCEPTION_CONTINUE_EXECUTION)
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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 & iThreadName) :
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m_ThreadName(iThreadName),
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m_ShouldTerminate(false),
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#ifdef _WIN32
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m_Handle(NULL)
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#else // _WIN32
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m_HasStarted(false)
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#endif // else _WIN32
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{
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}
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cIsThread::~cIsThread()
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{
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m_ShouldTerminate = true;
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Wait();
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}
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bool cIsThread::Start(void)
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{
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#ifdef _WIN32
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ASSERT(m_Handle == NULL); // Has already started one thread?
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// Create the thread suspended, so that the mHandle variable is valid in the thread procedure
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DWORD ThreadID = 0;
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m_Handle = CreateThread(NULL, 0, thrExecute, this, CREATE_SUSPENDED, &ThreadID);
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if (m_Handle == NULL)
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{
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LOGERROR("ERROR: Could not create thread \"%s\", GLE = %d!", m_ThreadName.c_str(), GetLastError());
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return false;
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}
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ResumeThread(m_Handle);
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#if defined(_DEBUG) && defined(_MSC_VER)
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// Thread naming is available only in MSVC
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if (!m_ThreadName.empty())
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{
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SetThreadName(ThreadID, m_ThreadName.c_str());
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}
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#endif // _DEBUG and _MSC_VER
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#else // _WIN32
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ASSERT(!m_HasStarted);
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if (pthread_create(&m_Handle, NULL, thrExecute, this))
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{
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LOGERROR("ERROR: Could not create thread \"%s\", !", m_ThreadName.c_str());
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return false;
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}
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m_HasStarted = true;
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#endif // else _WIN32
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return true;
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}
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bool cIsThread::Wait(void)
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{
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#ifdef _WIN32
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if (m_Handle == NULL)
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{
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return true;
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}
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// Cannot log, logger may already be stopped:
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// LOG("Waiting for thread \"%s\" to terminate.", m_ThreadName.c_str());
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int res = WaitForSingleObject(m_Handle, INFINITE);
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m_Handle = NULL;
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// Cannot log, logger may already be stopped:
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// LOG("Thread \"%s\" %s terminated, GLE = %d", m_ThreadName.c_str(), (res == WAIT_OBJECT_0) ? "" : "not", GetLastError());
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return (res == WAIT_OBJECT_0);
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#else // _WIN32
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if (!m_HasStarted)
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{
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return true;
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}
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// Cannot log, logger may already be stopped:
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// LOG("Waiting for thread \"%s\" to terminate.", m_ThreadName.c_str());
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int res = pthread_join(m_Handle, NULL);
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m_HasStarted = false;
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// Cannot log, logger may already be stopped:
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// LOG("Thread \"%s\" %s terminated, errno = %d", m_ThreadName.c_str(), (res == 0) ? "" : "not", errno);
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return (res == 0);
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#endif // else _WIN32
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}
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unsigned long cIsThread::GetCurrentID(void)
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{
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#ifdef _WIN32
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return (unsigned long) GetCurrentThreadId();
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#else
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return (unsigned long) pthread_self();
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#endif
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}
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