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// IsThread.cpp
// Implements the cIsThread class representing an OS-independent wrapper for a class that implements a thread.
// This class will eventually suupersede the old cThread class
#include "Globals.h"
#include "IsThread.h"
// When in MSVC, the debugger provides "thread naming" by catching special exceptions. Interface here:
#if defined(_MSC_VER) && defined(_DEBUG)
//
// Usage: SetThreadName (-1, "MainThread");
//
static void SetThreadName( DWORD dwThreadID, LPCSTR szThreadName)
{
struct
{
DWORD dwType; // must be 0x1000
LPCSTR szName; // pointer to name (in user addr space)
DWORD dwThreadID; // thread ID (-1=caller thread)
DWORD dwFlags; // reserved for future use, must be zero
} info;
info.dwType = 0x1000;
info.szName = szThreadName;
info.dwThreadID = dwThreadID;
info.dwFlags = 0;
__try
{
RaiseException(0x406D1388, 0, sizeof(info) / sizeof(DWORD), (DWORD *)&info);
}
__except(EXCEPTION_CONTINUE_EXECUTION)
{
}
}
#endif // _MSC_VER && _DEBUG
////////////////////////////////////////////////////////////////////////////////
// cIsThread:
cIsThread::cIsThread(const AString & iThreadName) :
m_ThreadName(iThreadName),
m_ShouldTerminate(false),
#ifdef _WIN32
m_Handle(NULL)
#else // _WIN32
m_HasStarted(false)
#endif // else _WIN32
{
}
cIsThread::~cIsThread()
{
m_ShouldTerminate = true;
Wait();
}
bool cIsThread::Start(void)
{
#ifdef _WIN32
ASSERT(m_Handle == NULL); // Has already started one thread?
// Create the thread suspended, so that the mHandle variable is valid in the thread procedure
DWORD ThreadID = 0;
m_Handle = CreateThread(NULL, 0, thrExecute, this, CREATE_SUSPENDED, &ThreadID);
if (m_Handle == NULL)
{
LOGERROR("ERROR: Could not create thread \"%s\", GLE = %d!", m_ThreadName.c_str(), GetLastError());
return false;
}
ResumeThread(m_Handle);
#if defined(_DEBUG) && defined(_MSC_VER)
// Thread naming is available only in MSVC
if (!m_ThreadName.empty())
{
SetThreadName(ThreadID, m_ThreadName.c_str());
}
#endif // _DEBUG and _MSC_VER
#else // _WIN32
ASSERT(!m_HasStarted);
if (pthread_create(&m_Handle, NULL, thrExecute, this))
{
LOGERROR("ERROR: Could not create thread \"%s\", !", m_ThreadName.c_str());
return false;
}
m_HasStarted = true;
#endif // else _WIN32
return true;
}
bool cIsThread::Wait(void)
{
#ifdef _WIN32
if (m_Handle == NULL)
{
return true;
}
// Cannot log, logger may already be stopped:
// LOG("Waiting for thread \"%s\" to terminate.", m_ThreadName.c_str());
int res = WaitForSingleObject(m_Handle, INFINITE);
m_Handle = NULL;
// Cannot log, logger may already be stopped:
// LOG("Thread \"%s\" %s terminated, GLE = %d", m_ThreadName.c_str(), (res == WAIT_OBJECT_0) ? "" : "not", GetLastError());
return (res == WAIT_OBJECT_0);
#else // _WIN32
if (!m_HasStarted)
{
return true;
}
// Cannot log, logger may already be stopped:
// LOG("Waiting for thread \"%s\" to terminate.", m_ThreadName.c_str());
int res = pthread_join(m_Handle, NULL);
m_HasStarted = false;
// Cannot log, logger may already be stopped:
// LOG("Thread \"%s\" %s terminated, errno = %d", m_ThreadName.c_str(), (res == 0) ? "" : "not", errno);
return (res == 0);
#endif // else _WIN32
}
unsigned long cIsThread::GetCurrentID(void)
{
#ifdef _WIN32
return (unsigned long) GetCurrentThreadId();
#else
return (unsigned long) pthread_self();
#endif
}
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