Sun Java System Web Server 6.1 SP7 NSAPI Programmer's Guide

dr_cache_init

The dr_cache_init function creates a persistent handle to the cache, or NULL on failure. It is called by an Init SAF.

Syntax

PRInt32 dr_cache_init(DrHdl *hdl, RefreshFunc_t ref, FreeFunc_t fre, 
CompareFunc_t cmp, PRUint32 maxEntries, PRIntervalTime maxAge);

Returns

1 if successful.

0 if an error occurs.

Parameters

The following table describes parameters for the dr_cache_init function.

Table 11–1 dr_cache_init parameters


Parameter	Description
`DrHdl` `hdl`	Pointer to an unallocated handle.
`RefreshFunc_t ref`	Pointer to a cache refresh function. This can be NULL. See the `DR_CHECK` flag and `DR_EXPIR` return value for `dr_net_write`.
`FreeFunc_t fre`	Pointer to a function that frees an entry.
`CompareFunc_t cmp`	Pointer to a key comparator function.
`PRUint32 maxEntriesp`	Maximum number of entries possible in the cache for a given `hdl`.
`PRIntervalTime maxAgep`	The maximum amount of time that an entry is valid. If `0`, the cache never expires.

Example

if(!dr_cache_init(&hdl, (RefreshFunc_t)FnRefresh,
(FreeFunc_t)FnFree, (CompareFunc_t)FnCompare, 150000, 
PR_SecondsToInterval(7200)))
{
    ereport(LOG_FAILURE, "dr_cache_init() failed");
    return(REQ_ABORTED);
}