diff options
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | generic/tclIO.c | 12 |
2 files changed, 15 insertions, 4 deletions
@@ -1,3 +1,10 @@ +2008-04-07 Andreas Kupries <andreask@activestate.com> + + * generic/tclIO.c (BUSY_STATE, CheckChannelErrors, + TclCopyChannel): New macro, and the places using it. This change + allows for bi-directional fcopy on channels. Thanks to Alexandre + Ferrieux <ferrieux@users.sourceforge.net> for the patch. + 2008-04-07 Reinhard Max <max@suse.de> * generic/tclStringObj.c (Tcl_AppendFormatToObj): diff --git a/generic/tclIO.c b/generic/tclIO.c index b44c1e6..60d60ea 100644 --- a/generic/tclIO.c +++ b/generic/tclIO.c @@ -10,7 +10,7 @@ * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclIO.c,v 1.139 2008/04/03 18:06:01 andreas_kupries Exp $ + * RCS: @(#) $Id: tclIO.c,v 1.140 2008/04/07 19:42:59 andreas_kupries Exp $ */ #include "tclInt.h" @@ -221,6 +221,10 @@ static Tcl_ObjType tclChannelType = { #define SET_CHANNELSTATE(objPtr, storePtr) \ ((objPtr)->internalRep.otherValuePtr = (void *) (storePtr)) +#define BUSY_STATE(st,fl) \ + ((st)->csPtr && \ + ( (((fl)&TCL_READABLE)&&((st)->csPtr->readPtr ==(st)->topChanPtr)) || \ + (((fl)&TCL_WRITABLE)&&((st)->csPtr->writePtr==(st)->topChanPtr)))) /* *--------------------------------------------------------------------------- @@ -6698,7 +6702,7 @@ CheckChannelErrors( * retrieving and transforming the data to copy. */ - if ((statePtr->csPtr != NULL) && ((flags & CHANNEL_RAW_MODE) == 0)) { + if (BUSY_STATE(statePtr,flags) && ((flags & CHANNEL_RAW_MODE) == 0)) { Tcl_SetErrno(EBUSY); return -1; } @@ -8429,14 +8433,14 @@ TclCopyChannel( inStatePtr = inPtr->state; outStatePtr = outPtr->state; - if (inStatePtr->csPtr) { + if (BUSY_STATE(inStatePtr,TCL_READABLE)) { if (interp) { Tcl_AppendResult(interp, "channel \"", Tcl_GetChannelName(inChan), "\" is busy", NULL); } return TCL_ERROR; } - if (outStatePtr->csPtr) { + if (BUSY_STATE(outStatePtr,TCL_WRITABLE)) { if (interp) { Tcl_AppendResult(interp, "channel \"", Tcl_GetChannelName(outChan), "\" is busy", NULL); |