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| author | hobbs <hobbs> | 2007-10-02 21:54:05 (GMT) |
|---|---|---|
| committer | hobbs <hobbs> | 2007-10-02 21:54:05 (GMT) |
| commit | 59e65563264c3248be60d5386869e66413d0f859 (patch) | |
| tree | e84de1a93bd53a28aedb593e328a0841e9d3c867 /generic/tcl.h | |
| parent | e1a0a36aa605b4676909544d263a0986deb1d1ee (diff) | |
| download | tcl-59e65563264c3248be60d5386869e66413d0f859.zip tcl-59e65563264c3248be60d5386869e66413d0f859.tar.gz tcl-59e65563264c3248be60d5386869e66413d0f859.tar.bz2 | |
* generic/tcl.h (Tcl_DecrRefCount): Update change from 2006-05-29
to make macro more warning-robust in unbraced if code.
Diffstat (limited to 'generic/tcl.h')
| -rw-r--r-- | generic/tcl.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/generic/tcl.h b/generic/tcl.h index fc31543..4914058 100644 --- a/generic/tcl.h +++ b/generic/tcl.h @@ -13,7 +13,7 @@ * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tcl.h,v 1.237 2007/10/02 18:27:29 dgp Exp $ + * RCS: @(#) $Id: tcl.h,v 1.238 2007/10/02 21:54:06 hobbs Exp $ */ #ifndef _TCL @@ -2296,10 +2296,11 @@ EXTERN CONST char *Tcl_PkgInitStubsCheck _ANSI_ARGS_((Tcl_Interp *interp, # define Tcl_IncrRefCount(objPtr) \ ++(objPtr)->refCount /* - * Use empty if ; else to handle use in unbraced outer if/else conditions + * Use do/while0 idiom for optimum correctness without compiler warnings + * http://c2.com/cgi/wiki?TrivialDoWhileLoop */ # define Tcl_DecrRefCount(objPtr) \ - if (--(objPtr)->refCount > 0) ; else TclFreeObj(objPtr) + do { if (--(objPtr)->refCount <= 0) TclFreeObj(objPtr); } while(0) # define Tcl_IsShared(objPtr) \ ((objPtr)->refCount > 1) #endif |