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/****************************************************************
* *
* Copyright 2001, 2011 Fidelity Information Services, Inc *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#ifndef CACHE_H
#define CACHE_H
/* Macros to add debugging to objcode cache for indirects. To enable, uncomment line below */
/*#define DEBUG_CACHE */
#ifdef DEBUG_CACHE
# define DBGCACHE(x) DBGFPF(x)
#else
# define DBGCACHE(x)
#endif
typedef struct {
mstr str;
uint4 code;
} icode_str; /* For indirect code source. */
typedef struct cache_ent
{
mstr obj;
icode_str src;
int refcnt; /* Number of indirect source code pointing to same cache entry */
int zb_refcnt; /* Number of zbreak action entry pointing to same cache entry */
} cache_entry;
/* Following is the indirect routine header build as part of an indirect code object */
typedef struct ihead_struct
{
cache_entry *indce;
int4 vartab_off;
int4 vartab_len;
int4 temp_mvals;
int4 temp_size;
int4 fixup_vals_off; /* literal mval table offset */
int4 fixup_vals_num; /* literal mval table's mval count */
} ihdtyp;
#define ICACHE_TABLE_INIT_SIZE 64 /* Use 1K memory initially */
#define ICACHE_SIZE ROUND_UP2(SIZEOF(cache_entry), NATIVE_WSIZE)
/* We allow cache_table to grow till we hit memory or entry maximums. If more memory is needed, we do compaction.
* Current default limits (overrideable by environment variable): 128 entries, 128KB of object code on all platforms
* except IA64 architecture which gets 256KB due to its less compact instruction forms.
*/
#define MAX_CACHE_MEMSIZE (IA64_ONLY(256) NON_IA64_ONLY(128))
#define MAX_CACHE_ENTRIES 128
void indir_lits(ihdtyp *ihead);
void cache_init(void);
mstr *cache_get(icode_str *indir_src);
void cache_put(icode_str *src, mstr *object);
void cache_table_rebuild(void);
void cache_stats(void);
#endif
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