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// File: OSD_Thread.cxx
// Created: Wed Apr 12 14:05:01 2006
// Author: Andrey BETENEV
#include <OSD_Thread.ixx>
//=============================================
// OSD_Thread::OSD_Thread
//=============================================
OSD_Thread::OSD_Thread ()
: myFunc(0), myThread(0), myThreadId(0), myPriority(0)
{}
//=============================================
// OSD_Thread::OSD_Thread
//=============================================
OSD_Thread::OSD_Thread (const OSD_ThreadFunction &func)
: myFunc(func), myThread(0), myThreadId(0), myPriority(0)
{}
//=============================================
// OSD_Thread::OSD_Thread
//=============================================
OSD_Thread::OSD_Thread (const OSD_Thread &other)
: myFunc(other.myFunc), myThread(0), myThreadId(0)
{
Assign ( other );
}
//=============================================
// OSD_Thread::Assign
//=============================================
void OSD_Thread::Assign (const OSD_Thread &other)
{
// copy function pointer
myFunc = other.myFunc;
myPriority = other.myPriority;
#ifdef WNT
// On Windows, close current handle
if ( myThread )
CloseHandle ( myThread );
myThread = 0;
// and replace it by duplicate of the source handle
if ( other.myThread ) {
HANDLE hProc = GetCurrentProcess(); // we are always within the same process
DuplicateHandle ( hProc, other.myThread, hProc, &myThread,
0, TRUE, DUPLICATE_SAME_ACCESS );
}
#else
// On Unix/Linux, just copy the thread id
myThread = other.myThread;
#endif
myThreadId = other.myThreadId;
}
//=============================================
// OSD_Thread::Destroy
//=============================================
void OSD_Thread::Destroy ()
{
#ifdef WNT
// On Windows, close current handle
if ( myThread )
CloseHandle ( myThread );
#else
// On Unix/Linux, do nothing
#endif
myThread = 0;
myThreadId = 0;
}
//=============================================
//function : SetPriority
//purpose : Set the thread priority relative to the caller's priority
//=============================================
void OSD_Thread::SetPriority (const Standard_Integer thePriority)
{
myPriority = thePriority;
#ifdef WNT
if (myThread)
SetThreadPriority (myThread, thePriority);
#endif
}
//=============================================
// OSD_Thread::SetFunction
//=============================================
void OSD_Thread::SetFunction (const OSD_ThreadFunction &func)
{
// close current handle if any
Destroy();
myFunc = func;
}
//=============================================
// OSD_Thread::Run
//=============================================
#ifdef WNT
#include <malloc.h>
// On Windows the signature of the thread function differs from that on UNIX/Linux.
// As we use the same definition of the thread function on all platforms (POSIX-like),
// we need to introduce appropriate wrapper function on Windows.
struct WNTthread_data { void *data; OSD_ThreadFunction func; };
static DWORD WINAPI WNTthread_func (LPVOID data)
{
WNTthread_data *adata = (WNTthread_data*)data;
void* ret = adata->func ( adata->data );
free ( adata );
return (DWORD)ret;
}
#endif
Standard_Boolean OSD_Thread::Run (const Standard_Address data,
#ifdef WNT
const Standard_Integer WNTStackSize
#else
const Standard_Integer
#endif
)
{
if ( ! myFunc ) return Standard_False;
myThreadId = 0;
#ifdef WNT
// On Windows, close current handle if open
if ( myThread )
CloseHandle ( myThread );
myThread = 0;
// allocate intermediate data structure to pass both data parameter and address
// of the real thread function to Windows thread wrapper function
WNTthread_data *adata = (WNTthread_data*)malloc ( sizeof(WNTthread_data) );
if ( ! adata ) return Standard_False;
adata->data = data;
adata->func = myFunc;
// then try to create a new thread
myThread = CreateThread ( NULL, WNTStackSize, WNTthread_func,
adata, 0, &myThreadId );
if ( myThread )
SetThreadPriority (myThread, myPriority);
else {
memset ( adata, 0, sizeof(WNTthread_data) );
free ( adata );
}
#else
// On Unix/Linux, create a new thread
if ( pthread_create ( &myThread, 0, myFunc, data ) )
myThread = 0;
else myThreadId = myThread;
#endif
return myThread != 0;
}
//=============================================
// OSD_Thread::Detach
//=============================================
void OSD_Thread::Detach ()
{
#ifdef WNT
// On Windows, close current handle
if ( myThread )
CloseHandle ( myThread );
#else
// On Unix/Linux, detach a thread
if ( myThread )
pthread_detach ( myThread );
#endif
myThread = 0;
myThreadId = 0;
}
//=============================================
// OSD_Thread::Wait
//=============================================
Standard_Boolean OSD_Thread::Wait () const
{
Standard_Address aRes = 0;
return Wait ( aRes );
}
//=============================================
// OSD_Thread::Wait
//=============================================
Standard_Boolean OSD_Thread::Wait (Standard_Address &result) const
{
// check that thread handle is not null
result = 0;
if ( ! myThread )
return Standard_False;
#ifdef WNT
// On Windows, wait for the thread handle to be signaled
if ( WaitForSingleObject ( myThread, INFINITE ) != WAIT_OBJECT_0 )
return Standard_False;
// and convert result of the thread execution to Standard_Address
DWORD anExitCode;
if ( GetExitCodeThread ( myThread, &anExitCode ) )
result = (Standard_Address)anExitCode;
return Standard_True;
#else
// On Unix/Linux, join the thread
return ! pthread_join ( myThread, &result );
#endif
}
//=============================================
// OSD_Thread::Wait
//=============================================
Standard_Boolean OSD_Thread::Wait (const Standard_Integer time, Standard_Address &result) const
{
// check that thread handle is not null
result = 0;
if ( ! myThread )
return Standard_False;
#ifdef WNT
// On Windows, wait for the thread handle to be signaled
DWORD ret = WaitForSingleObject ( myThread, time );
if (ret == WAIT_OBJECT_0)
{
DWORD anExitCode;
if ( GetExitCodeThread ( myThread, &anExitCode ) )
result = (Standard_Address)anExitCode;
return Standard_True;
}
else if (ret == WAIT_TIMEOUT)
{
return Standard_False;
}
return Standard_False;
#else
// On Unix/Linux, join the thread
return ! pthread_join ( myThread, &result );
#endif
}
//=============================================
// OSD_Thread::GetId
//=============================================
Standard_ThreadId OSD_Thread::GetId () const
{
return myThreadId;
}
//=============================================
// OSD_Thread::Current
//=============================================
Standard_ThreadId OSD_Thread::Current ()
{
#ifdef WNT
return GetCurrentThreadId();
#else
return pthread_self();
#endif
}
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