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* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*/
#include "tclWinInt.h"
#include <fcntl.h>
#include <float.h>
#include <io.h>
#include <sys/stat.h>
/*
* This is the master lock used to serialize access to other
* serialization data structures.
*/
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typedef struct WinCondition {
CRITICAL_SECTION condLock; /* Lock to serialize queuing on the condition */
struct ThreadSpecificData *firstPtr; /* Queue pointers */
struct ThreadSpecificData *lastPtr;
} WinCondition;
/*
* The per thread data passed from TclpThreadCreate
* to TclWinThreadStart.
*/
typedef struct WinThread {
LPTHREAD_START_ROUTINE lpStartAddress; /* Original startup routine */
LPVOID lpParameter; /* Original startup data */
unsigned int fpControl; /* Floating point control word from the
* main thread */
} WinThread;
/*
*----------------------------------------------------------------------
*
* TclWinThreadStart --
*
* This procedure is the entry point for all new threads created
* by Tcl on Windows.
*
* Results:
* Various, depending on the result of the wrapped thread start
* routine.
*
* Side effects:
* Arbitrary, since user code is executed.
*
*----------------------------------------------------------------------
*/
static DWORD WINAPI
TclWinThreadStart(
LPVOID lpParameter) /* The WinThread structure pointer passed
* from TclpThreadCreate */
{
WinThread *winThreadPtr = (WinThread *) lpParameter;
unsigned int fpmask = _MCW_EM | _MCW_RC | _MCW_PC | _MCW_DN;
if (!winThreadPtr) {
return TCL_ERROR;
}
_controlfp(winThreadPtr->fpControl, fpmask);
return winThreadPtr->lpStartAddress(winThreadPtr->lpParameter);
}
/*
*----------------------------------------------------------------------
*
* TclpThreadCreate --
*
* This procedure creates a new thread.
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Tcl_ThreadId *idPtr; /* Return, the ID of the thread */
Tcl_ThreadCreateProc proc; /* Main() function of the thread */
ClientData clientData; /* The one argument to Main() */
int stackSize; /* Size of stack for the new thread */
int flags; /* Flags controlling behaviour of
* the new thread */
{
WinThread *winThreadPtr; /* Per-thread startup info */
HANDLE tHandle;
winThreadPtr = (WinThread *)ckalloc(sizeof(WinThread));
winThreadPtr->lpStartAddress = proc;
winThreadPtr->lpParameter = clientData;
winThreadPtr->fpControl = _controlfp(0, 0);
EnterCriticalSection(&joinLock);
#if defined(_MSC_VER) || defined(__MSVCRT__) || defined(__BORLANDC__)
tHandle = (HANDLE) _beginthreadex(NULL, (unsigned) stackSize, proc,
clientData, 0, (unsigned *)idPtr);
tHandle = (HANDLE) _beginthreadex(NULL, (unsigned) stackSize,
TclWinThreadStart, winThreadPtr, 0, (unsigned *)idPtr);
#else
tHandle = CreateThread(NULL, (DWORD) stackSize,
(LPTHREAD_START_ROUTINE) proc, (LPVOID) clientData,
(DWORD) 0, (LPDWORD)idPtr);
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