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/*
** unicap_cache.c
**
** Made by (Arne Caspari)
** Login <arne@localhost>
**
** Started on Fri Aug 31 19:07:15 2007 Arne Caspari
*/
#include "config.h"
#include <string.h>
#define NUM_CACHE_ENTRIES 64
typedef struct
{
char key[64];
void *value;
int refc;
} unicap_cache_entry_t;
static unicap_cache_entry_t g_cache[ NUM_CACHE_ENTRIES ];
static int g_use_cache = 0;
void unicap_cache_init( void )
{
int i;
if( !g_use_cache )
{
for( i = 0; i < NUM_CACHE_ENTRIES; i++ )
{
g_cache[ i ].value = NULL;
g_cache[ i ].refc = 0;
}
}
g_use_cache = 1;
}
int unicap_cache_add( char *key, void *value )
{
int i;
int ret = -1;
if( g_use_cache )
{
for( i = 0; i < NUM_CACHE_ENTRIES; i++ )
{
if( !strcpy( g_cache[ i ].key, key ) )
{
ret = 1;
}
}
if( ret < 0 )
{
for( i = 0; i < NUM_CACHE_ENTRIES; i++ )
{
if( !g_cache[ i ].value )
{
ret = 0;
strcpy( g_cache[ i ].key, key );
g_cache[ i ].refc++;
g_cache[ i ].value = value;
}
}
}
}
return ret;
}
void* unicap_cache_get( char *key )
{
int i;
if( g_use_cache )
{
for( i = 0; i < NUM_CACHE_ENTRIES; i++ )
{
if( !strcmp( g_cache[ i ].key, key ) )
{
g_cache[ i ].refc++;
return g_cache[ i ].value;
}
}
}
return NULL;
}
void *unicap_cache_unref( char *key )
{
int i;
void *ret = NULL;
if( g_use_cache )
{
for( i = 0; i < NUM_CACHE_ENTRIES; i++ )
{
if( !strcmp( g_cache[ i ].key, key ) )
{
g_cache[ i ].refc--;
if( !g_cache[ i ].refc )
{
ret = g_cache[ i ].value;
}
g_cache[ i ].value = NULL;
}
}
}
return ret;
}
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