XtCallbackR(3X)XtCallbackR(3X)NOTE
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XtCallbackReleaseCacheRef XtCallbackF
XtCallbackReleaseCacheRefList XtCallbackG
XtCallbackR(3X)
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XtAppReleaseCacheRefs() XtAppReleaseCacheRefs()
Name
XtAppReleaseCacheRefs - decrement the reference counts for cached resources obtained from XtCallConverter().
Synopsis
void XtAppReleaseCacheRefs(app, refs)
XtAppContext app;
XtCacheRef *refs;
Inputs
app Specifies the application context.
refs Specifies a NULL-terminated array of cache references to be decremented.
Availability
Release 4 and later.
Description
XtAppReleaseCacheRefs() decrements the reference count for each XtCacheRef in the NULL-terminated array refs. If any reference count
reaches zero, the destructor registered with XtSetTypeConverter() for that resource type, if any, will be called and the resource removed
from the conversion cache.
An XtCacheRef is a handle to a cached resource value. It is obtained in a call to XtCallConverter().
Usage
Applications and widgets should very rarely need to call this function. The Intrinsics provide two predefined callbacks which can be reg-
istered with an XtCacheRef or an array of XtCacheRef on the destroy callback of a widget or object to automatically call XtAppRelease-
CacheRefs() when the resources are no longer needed. See XtCallbackReleaseCacheRef() and XtCallbackReleaseCacheRefList().
Additionally, the function XtConvertAndStore() which is a higher-level interface to resource converters than XtCallConverter() is passed a
widget or object and automatically registers XtCallbackReleaseCacheRef() on the object's destroy callback if needed. XtCreateWidget() may
also register such callbacks.
Structures
XtCacheRef is an opaque type.
See AlsoXtCallbackReleaseCacheRef(1), XtCallbackReleaseCacheRefList(1), XtCallConverter(1), XtConvertAndStore(1), XtSetTypeConverter(1),
XtDestructor(2).
Xt - Resource Management XtAppReleaseCacheRefs()
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