Author: sebor
Date: Thu Jul 5 18:21:20 2007
New Revision: 553686
URL: http://svn.apache.org/viewvc?view=rev&rev=553686
Log:
2007-07-05 Martin Sebor <[EMAIL PROTECTED]>
* use_facet.h (_RWSTD_DEFINE_FACET_FACTORY): Documented macro
and "constified" a local variable in its definition.
Modified:
incubator/stdcxx/trunk/src/use_facet.h
Modified: incubator/stdcxx/trunk/src/use_facet.h
URL:
http://svn.apache.org/viewvc/incubator/stdcxx/trunk/src/use_facet.h?view=diff&rev=553686&r1=553685&r2=553686
==============================================================================
--- incubator/stdcxx/trunk/src/use_facet.h (original)
+++ incubator/stdcxx/trunk/src/use_facet.h Thu Jul 5 18:21:20 2007
@@ -39,6 +39,13 @@
#include "access.h"
+// helper macro _RWSTD_DEFINE_FACET_FACTORY() defines a facet factory
+// function called to construct, on demand, objects of specializations
+// of facet class templates
+// _byname facets are constructed on the heap while ordinary facets
+// are constructed in static memory for efficiency and to avoid leaks,
+// and are not destroyed during program lifetime
+
#ifndef _RWSTD_NO_BYNAME_FACET
// definition for facets that come in both forms, plain and _byname
@@ -51,9 +58,11 @@
{ \
__rw_facet* pfacet; \
if (name) { \
+ /* construct a _byname facet on the heap */ \
pfacet = new _STD:: Facet ## _byname TArgs (name, ref); \
} \
else { \
+ /* construct an ordinary facet in static memory */ \
static union { \
void *align_; \
char data_ [sizeof (__rw_ ## fid ## _facet)]; \
@@ -80,11 +89,12 @@
Linkage __rw_facet* \
__rw_ct_ ## fid (_RWSTD_SIZE_T ref, const char*) \
{ \
+ /* construct an ordinary facet in static memory */ \
static union { \
void *align_; \
char data_ [sizeof (__rw_ ## fid ## _facet)]; \
} f; \
- static __rw_facet *pf = \
+ static __rw_facet* const pf = \
new (&f) __rw_ ## fid ## _facet (ref); \
/* set the pointer to the facet id */ \
__rw_access::_C_get_pid (*pf) = \
