diff options
Diffstat (limited to 'win/tclWinSock.c')
| -rw-r--r-- | win/tclWinSock.c | 103 |
1 files changed, 56 insertions, 47 deletions
diff --git a/win/tclWinSock.c b/win/tclWinSock.c index e96eb96..8af394b 100644 --- a/win/tclWinSock.c +++ b/win/tclWinSock.c @@ -8,7 +8,7 @@ * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclWinSock.c,v 1.46 2005/05/10 18:35:41 kennykb Exp $ + * RCS: @(#) $Id: tclWinSock.c,v 1.47 2005/07/13 20:01:02 dgp Exp $ */ #include "tclWinInt.h" @@ -28,13 +28,15 @@ */ static int initialized = 0; - -static int hostnameInitialized = 0; -static char hostname[255]; /* This buffer should be big enough for - * hostname plus domain name. */ - TCL_DECLARE_MUTEX(socketMutex) +/* + * The following variable holds the network name of this host. + */ + +static TclInitProcessGlobalValueProc InitializeHostName; +static ProcessGlobalValue hostName = + {0, 0, NULL, NULL, InitializeHostName, NULL, NULL}; /* * Mingw, Cygwin and OpenWatcom may not have LPFN_* typedefs. @@ -598,7 +600,6 @@ SocketExitHandler(clientData) winSock.hModule = NULL; } initialized = 0; - hostnameInitialized = 0; Tcl_MutexUnlock(&socketMutex); } @@ -2520,12 +2521,11 @@ SocketProc(hwnd, message, wParam, lParam) * Returns the name of the local host. * * Results: - * A string containing the network name for this machine, or - * an empty string if we can't figure out the name. The caller - * must not modify or free this string. + * A string containing the network name for this machine. + * The caller must not modify or free this string. * * Side effects: - * None. + * Caches the name to return for future calls. * *---------------------------------------------------------------------- */ @@ -2533,49 +2533,58 @@ SocketProc(hwnd, message, wParam, lParam) CONST char * Tcl_GetHostName() { - DWORD length; - WCHAR wbuf[MAX_COMPUTERNAME_LENGTH + 1]; - - Tcl_MutexLock(&socketMutex); - InitSockets(); + return Tcl_GetString(TclGetProcessGlobalValue(&hostName)); +} + +/* + *---------------------------------------------------------------------- + * + * InitializeHostName -- + * + * This routine sets the process global value of the name of + * the local host on which the process is running. + * + * Results: + * None. + * + *---------------------------------------------------------------------- + */ - if (hostnameInitialized) { - Tcl_MutexUnlock(&socketMutex); - return hostname; - } - Tcl_MutexUnlock(&socketMutex); - - if (TclpHasSockets(NULL) == TCL_OK) { - /* - * INTL: bug - */ +void +InitializeHostName(valuePtr, lengthPtr, encodingPtr) + char **valuePtr; + int *lengthPtr; + Tcl_Encoding *encodingPtr; +{ + WCHAR wbuf[MAX_COMPUTERNAME_LENGTH + 1]; + DWORD length = sizeof(wbuf) / sizeof(WCHAR); + Tcl_DString ds; - if (winSock.gethostname(hostname, sizeof(hostname)) == 0) { - Tcl_MutexLock(&socketMutex); - hostnameInitialized = 1; - Tcl_MutexUnlock(&socketMutex); - return hostname; - } - } - Tcl_MutexLock(&socketMutex); - length = sizeof(hostname); if ((*tclWinProcs->getComputerNameProc)(wbuf, &length) != 0) { /* * Convert string from native to UTF then change to lowercase. */ - - Tcl_DString ds; - - lstrcpynA(hostname, Tcl_WinTCharToUtf((TCHAR *) wbuf, -1, &ds), - sizeof(hostname)); - Tcl_DStringFree(&ds); - Tcl_UtfToLower(hostname); - } else { - hostname[0] = '\0'; + Tcl_UtfToLower(Tcl_WinTCharToUtf((TCHAR *) wbuf, -1, &ds)); + } else if (TclpHasSockets(NULL) == TCL_OK) { + /* + * Buffer length of 255 copied slavishly from previous version + * of this routine. Presumably there's a more "correct" macro + * value for a properly sized buffer for a gethostname() call. + * Maintainers are welcome to supply it. + */ + Tcl_DStringInit(&ds); + Tcl_DStringSetLength(&ds, 255); + if (winSock.gethostname(Tcl_DStringValue(&ds), Tcl_DStringLength(&ds)) + == 0) { + Tcl_DStringSetLength(&ds, 0); + } } - hostnameInitialized = 1; - Tcl_MutexUnlock(&socketMutex); - return hostname; + *encodingPtr = Tcl_GetEncoding(NULL, "utf-8"); + *lengthPtr = Tcl_DStringLength(&ds); + *valuePtr = ckalloc((unsigned int) (*lengthPtr)+1); + memcpy((VOID *) *valuePtr, (VOID *) Tcl_DStringValue(&ds), + (size_t)(*lengthPtr)+1); + Tcl_DStringFree(&ds); } /* |