diff options
| -rw-r--r-- | win/tclWinThrd.c | 75 |
1 files changed, 71 insertions, 4 deletions
diff --git a/win/tclWinThrd.c b/win/tclWinThrd.c index 8544e71..96c8894 100644 --- a/win/tclWinThrd.c +++ b/win/tclWinThrd.c @@ -12,6 +12,7 @@ #include "tclWinInt.h" +#include <float.h> #include <sys/stat.h> /* @@ -123,6 +124,66 @@ typedef struct allocMutex { #endif /* USE_THREAD_ALLOC */ /* + * 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; + LPTHREAD_START_ROUTINE lpOrigStartAddress; + LPVOID lpOrigParameter; + + if (!winThreadPtr) { + return TCL_ERROR; + } + + fpmask = _MCW_EM | _MCW_RC | _MCW_PC; + +#if defined(_MSC_VER) && _MSC_VER >= 1200 + fpmask |= _MCW_DN; +#endif + + _controlfp(winThreadPtr->fpControl, fpmask); + + lpOrigStartAddress = winThreadPtr->lpStartAddress; + lpOrigParameter = winThreadPtr->lpParameter; + + ckfree((char *)winThreadPtr); + return lpOrigStartAddress(lpOrigParameter); +} + +/* *---------------------------------------------------------------------- * * TclpThreadCreate -- @@ -148,8 +209,14 @@ TclpThreadCreate( int flags) /* Flags controlling behaviour of the new * thread. */ { + WinThread *winThreadPtr; /* Per-thread startup info */ HANDLE tHandle; + winThreadPtr = (WinThread *)ckalloc(sizeof(WinThread)); + winThreadPtr->lpStartAddress = (LPTHREAD_START_ROUTINE) proc; + winThreadPtr->lpParameter = clientData; + winThreadPtr->fpControl = _controlfp(0, 0); + EnterCriticalSection(&joinLock); *idPtr = 0; /* must initialize as Tcl_Thread is a pointer and @@ -157,12 +224,12 @@ TclpThreadCreate( */ #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, + (Tcl_ThreadCreateProc*) TclWinThreadStart, winThreadPtr, + 0, (unsigned *)idPtr); #else tHandle = CreateThread(NULL, (DWORD) stackSize, - (LPTHREAD_START_ROUTINE) proc, (LPVOID) clientData, - (DWORD) 0, (LPDWORD)idPtr); + TclWinThreadStart, winThreadPtr, 0, (LPDWORD)idPtr); #endif if (tHandle == NULL) { |