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Fixing code indentation with pgindent

pull/389/head
Hamid Akhtar 2023-02-27 14:18:19 +05:00 committed by Muhammad Usama
parent 1883b05fc7
commit faa938b8f1
4 changed files with 3440 additions and 3576 deletions
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2
guc.c
View File

@ -297,6 +297,6 @@ static bool
check_overflow_targer(int *newval, void **extra, GucSource source)
{
if (source != PGC_S_DEFAULT)
elog(WARNING,"pg_stat_monitor.pgsm_overflow_target is deprecated, use pgsm_enable_overflow");
elog(WARNING, "pg_stat_monitor.pgsm_overflow_target is deprecated, use pgsm_enable_overflow");
return true;
}

112
hash_query.c
View File

@ -19,9 +19,9 @@
#include "pg_stat_monitor.h"
static pgsmLocalState pgsmStateLocal;
static PGSM_HASH_TABLE_HANDLE pgsm_create_bucket_hash(pgsmSharedState *pgsm, dsa_area *dsa);
static PGSM_HASH_TABLE_HANDLE pgsm_create_bucket_hash(pgsmSharedState * pgsm, dsa_area * dsa);
static Size pgsm_get_shared_area_size(void);
static void InitializeSharedState(pgsmSharedState *pgsm);
static void InitializeSharedState(pgsmSharedState * pgsm);
#if USE_DYNAMIC_HASH
/* parameter for the shared hash */
@ -40,28 +40,26 @@ static dshash_parameters dsh_params = {
*/
static Size
pgsm_query_area_size(void)
{
pgsm_query_area_size(void) {
Size sz = MAX_QUERY_BUF;
#if USE_DYNAMIC_HASH
#if USE_DYNAMIC_HASH
/* Dynamic hash also lives DSA area */
sz = add_size(sz, MAX_BUCKETS_MEM);
#endif
#endif
return MAXALIGN(sz);
}
/*
* Total shared memory area required by pgsm
*/
Size
pgsm_ShmemSize(void)
{
pgsm_ShmemSize(void) {
Size sz = MAXALIGN(sizeof(pgsmSharedState));
sz = add_size(sz, MAX_QUERY_BUF);
#if USE_DYNAMIC_HASH
#if USE_DYNAMIC_HASH
sz = add_size(sz, MAX_BUCKETS_MEM);
#else
#else
sz = add_size(sz, hash_estimate_size(MAX_BUCKET_ENTRIES, sizeof(pgsmEntry)));
#endif
#endif
return MAXALIGN(sz);
}
@ -72,15 +70,14 @@ pgsm_ShmemSize(void)
* get allocated as a single shared memory chunk.
*/
static Size
pgsm_get_shared_area_size(void)
{
pgsm_get_shared_area_size(void) {
Size sz;
#if USE_DYNAMIC_HASH
#if USE_DYNAMIC_HASH
sz = pgsm_ShmemSize();
#else
#else
sz = MAXALIGN(sizeof(pgsmSharedState));
sz = add_size(sz, pgsm_query_area_size());
#endif
#endif
return sz;
}
@ -100,8 +97,7 @@ pgsm_startup(void)
LWLockAcquire(AddinShmemInitLock, LW_EXCLUSIVE);
pgsm = ShmemInitStruct("pg_stat_monitor", pgsm_get_shared_area_size(), &found);
if (!found)
{
if (!found) {
/* First time through ... */
dsa_area *dsa;
char *p = (char *) pgsm;
@ -119,11 +115,12 @@ pgsm_startup(void)
dsa_pin(dsa);
dsa_set_size_limit(dsa, pgsm_query_area_size());
pgsm->hash_handle = pgsm_create_bucket_hash(pgsm,dsa);
pgsm->hash_handle = pgsm_create_bucket_hash(pgsm, dsa);
/* If overflow is enabled, set the DSA size to unlimited,
* and allow the DSA to grow beyond the shared memory space
* into the swap area*/
/*
* If overflow is enabled, set the DSA size to unlimited, and allow
* the DSA to grow beyond the shared memory space into the swap area
*/
if (pgsm_enable_overflow)
dsa_set_size_limit(dsa, -1);
@ -149,7 +146,7 @@ pgsm_startup(void)
}
static void
InitializeSharedState(pgsmSharedState *pgsm)
InitializeSharedState(pgsmSharedState * pgsm)
{
pg_atomic_init_u64(&pgsm->current_wbucket, 0);
pg_atomic_init_u64(&pgsm->prev_bucket_sec, 0);
@ -164,8 +161,7 @@ InitializeSharedState(pgsmSharedState *pgsm)
* Create the classic or dshahs hash table for storing the query statistics.
*/
static PGSM_HASH_TABLE_HANDLE
pgsm_create_bucket_hash(pgsmSharedState *pgsm, dsa_area *dsa)
{
pgsm_create_bucket_hash(pgsmSharedState * pgsm, dsa_area * dsa) {
PGSM_HASH_TABLE_HANDLE bucket_hash;
#if USE_DYNAMIC_HASH
@ -202,15 +198,16 @@ pgsm_attach_shmem(void)
return;
/*
* We want the dsa to remain valid throughout the lifecycle of this process.
* so switch to TopMemoryContext before attaching
* We want the dsa to remain valid throughout the lifecycle of this
* process. so switch to TopMemoryContext before attaching
*/
oldcontext = MemoryContextSwitchTo(TopMemoryContext);
pgsmStateLocal.dsa = dsa_attach_in_place(pgsmStateLocal.shared_pgsmState->raw_dsa_area,
NULL);
/* pin the attached area to keep the area attached until end of
* session or explicit detach.
/*
* pin the attached area to keep the area attached until end of session or
* explicit detach.
*/
dsa_pin_mapping(pgsmStateLocal.dsa);
@ -225,14 +222,14 @@ pgsm_attach_shmem(void)
MemoryContextSwitchTo(oldcontext);
}
dsa_area*
dsa_area *
get_dsa_area_for_query_text(void)
{
pgsm_attach_shmem();
return pgsmStateLocal.dsa;
}
PGSM_HASH_TABLE*
PGSM_HASH_TABLE *
get_pgsmHash(void)
{
pgsm_attach_shmem();
@ -257,7 +254,7 @@ void
pgsm_shmem_shutdown(int code, Datum arg)
{
/* Don't try to dump during a crash. */
elog(LOG,"[pg_stat_monitor] pgsm_shmem_shutdown: Shutdown initiated.");
elog(LOG, "[pg_stat_monitor] pgsm_shmem_shutdown: Shutdown initiated.");
if (code)
return;
@ -269,16 +266,15 @@ pgsm_shmem_shutdown(int code, Datum arg)
}
pgsmEntry *
hash_entry_alloc(pgsmSharedState *pgsm, pgsmHashKey *key, int encoding)
hash_entry_alloc(pgsmSharedState * pgsm, pgsmHashKey * key, int encoding)
{
pgsmEntry *entry = NULL;
bool found = false;
/* Find or create an entry with desired hash code */
entry = (pgsmEntry*) pgsm_hash_find_or_insert(pgsmStateLocal.shared_hash, key, &found);
entry = (pgsmEntry *) pgsm_hash_find_or_insert(pgsmStateLocal.shared_hash, key, &found);
if (entry == NULL)
elog(DEBUG1, "[pg_stat_monitor] hash_entry_alloc: OUT OF MEMORY.");
else if (!found)
{
else if (!found) {
pgsm->bucket_entry[pg_atomic_read_u64(&pgsm->current_wbucket)]++;
/* New entry, initialize it */
/* reset the statistics */
@ -292,10 +288,10 @@ hash_entry_alloc(pgsmSharedState *pgsm, pgsmHashKey *key, int encoding)
/* ... and don't forget the query text metadata */
entry->encoding = encoding;
}
#if USE_DYNAMIC_HASH
if(entry)
#if USE_DYNAMIC_HASH
if (entry)
dshash_release_lock(pgsmStateLocal.shared_hash, entry);
#endif
#endif
return entry;
}
@ -325,8 +321,7 @@ hash_entry_dealloc(int new_bucket_id, int old_bucket_id, unsigned char *query_bu
/* Iterate over the hash table. */
pgsm_hash_seq_init(&hstat, pgsmStateLocal.shared_hash, true);
while ((entry = pgsm_hash_seq_next(&hstat)) != NULL)
{
while ((entry = pgsm_hash_seq_next(&hstat)) != NULL) {
dsa_pointer pdsa;
/*
@ -334,8 +329,7 @@ hash_entry_dealloc(int new_bucket_id, int old_bucket_id, unsigned char *query_bu
* in new_bucket_id if it has finished already.
*/
if (new_bucket_id < 0 ||
(entry->key.bucket_id == new_bucket_id ))
{
(entry->key.bucket_id == new_bucket_id)) {
dsa_pointer parent_qdsa = entry->counters.info.parent_query;
pdsa = entry->query_text.query_pos;
@ -371,29 +365,29 @@ IsSystemOOM(void)
*/
void *
pgsm_hash_find_or_insert(PGSM_HASH_TABLE *shared_hash, pgsmHashKey *key, bool* found)
pgsm_hash_find_or_insert(PGSM_HASH_TABLE * shared_hash, pgsmHashKey * key, bool *found)
{
#if USE_DYNAMIC_HASH
#if USE_DYNAMIC_HASH
void *entry;
entry = dshash_find_or_insert(shared_hash, key, found);
return entry;
#else
#else
return hash_search(shared_hash, key, HASH_ENTER_NULL, found);
#endif
#endif
}
void *
pgsm_hash_find(PGSM_HASH_TABLE *shared_hash, pgsmHashKey *key, bool* found)
pgsm_hash_find(PGSM_HASH_TABLE * shared_hash, pgsmHashKey * key, bool *found)
{
#if USE_DYNAMIC_HASH
#if USE_DYNAMIC_HASH
return dshash_find(shared_hash, key, false);
#else
#else
return hash_search(shared_hash, key, HASH_FIND, found);
#endif
#endif
}
void
pgsm_hash_seq_init(PGSM_HASH_SEQ_STATUS *hstat, PGSM_HASH_TABLE *shared_hash, bool lock)
pgsm_hash_seq_init(PGSM_HASH_SEQ_STATUS * hstat, PGSM_HASH_TABLE * shared_hash, bool lock)
{
#if USE_DYNAMIC_HASH
dshash_seq_init(hstat, shared_hash, lock);
@ -402,8 +396,8 @@ pgsm_hash_seq_init(PGSM_HASH_SEQ_STATUS *hstat, PGSM_HASH_TABLE *shared_hash, bo
#endif
}
void*
pgsm_hash_seq_next(PGSM_HASH_SEQ_STATUS *hstat)
void *
pgsm_hash_seq_next(PGSM_HASH_SEQ_STATUS * hstat)
{
#if USE_DYNAMIC_HASH
return dshash_seq_next(hstat);
@ -413,7 +407,7 @@ pgsm_hash_seq_next(PGSM_HASH_SEQ_STATUS *hstat)
}
void
pgsm_hash_seq_term(PGSM_HASH_SEQ_STATUS *hstat)
pgsm_hash_seq_term(PGSM_HASH_SEQ_STATUS * hstat)
{
#if USE_DYNAMIC_HASH
dshash_seq_term(hstat);
@ -421,11 +415,11 @@ pgsm_hash_seq_term(PGSM_HASH_SEQ_STATUS *hstat)
}
void
pgsm_hash_delete_current(PGSM_HASH_SEQ_STATUS *hstat, PGSM_HASH_TABLE *shared_hash, void *key)
pgsm_hash_delete_current(PGSM_HASH_SEQ_STATUS * hstat, PGSM_HASH_TABLE * shared_hash, void *key)
{
#if USE_DYNAMIC_HASH
#if USE_DYNAMIC_HASH
dshash_delete_current(hstat);
#else
#else
hash_search(shared_hash, key, HASH_REMOVE, NULL);
#endif
#endif
}

816
pg_stat_monitor.c
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File diff suppressed because it is too large Load Diff

144
pg_stat_monitor.h
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@ -66,13 +66,16 @@
/* XXX: Should USAGE_EXEC reflect execution time and/or buffer usage? */
#define USAGE_EXEC(duration) (1.0)
#define USAGE_INIT (1.0) /* including initial planning */
#define ASSUMED_LENGTH_INIT 1024 /* initial assumed mean query length */
#define USAGE_INIT (1.0) /* including initial
* planning */
#define ASSUMED_LENGTH_INIT 1024 /* initial assumed mean query
* length */
#define USAGE_DECREASE_FACTOR (0.99) /* decreased every entry_dealloc */
#define STICKY_DECREASE_FACTOR (0.50) /* factor for sticky entries */
#define USAGE_DEALLOC_PERCENT 5 /* free this % of entries at once */
#define JUMBLE_SIZE 1024 /* query serialization buffer size */
#define JUMBLE_SIZE 1024 /* query serialization
* buffer size */
#define HISTOGRAM_MAX_TIME 50000000
#define MAX_RESPONSE_BUCKET 50
@ -82,7 +85,10 @@
#define ERROR_MESSAGE_LEN 100
#define REL_TYPENAME_LEN 64
#define REL_LST 10
#define REL_LEN 132 /* REL_TYPENAME_LEN * 2 (relname + schema) + 1 (for view indication) + 1 and dot and string terminator */
#define REL_LEN 132 /* REL_TYPENAME_LEN * 2
* (relname + schema) + 1 (for
* view indication) + 1 and
* dot and string terminator */
#define CMD_LST 10
#define CMD_LEN 20
#define APPLICATIONNAME_LEN NAMEDATALEN
@ -158,19 +164,18 @@ extern volatile bool __pgsm_do_not_capture_error;
* the classic shared memory hash table.
*/
#ifdef USE_DYNAMIC_HASH
#define PGSM_HASH_TABLE dshash_table
#define PGSM_HASH_TABLE_HANDLE dshash_table_handle
#define PGSM_HASH_SEQ_STATUS dshash_seq_status
#define PGSM_HASH_TABLE dshash_table
#define PGSM_HASH_TABLE_HANDLE dshash_table_handle
#define PGSM_HASH_SEQ_STATUS dshash_seq_status
#else
#define PGSM_HASH_TABLE HTAB
#define PGSM_HASH_TABLE_HANDLE HTAB*
#define PGSM_HASH_SEQ_STATUS HASH_SEQ_STATUS
#define PGSM_HASH_TABLE HTAB
#define PGSM_HASH_TABLE_HANDLE HTAB*
#define PGSM_HASH_SEQ_STATUS HASH_SEQ_STATUS
#endif
#if PG_VERSION_NUM < 130000
typedef struct WalUsage
{
typedef struct WalUsage {
long wal_records; /* # of WAL records produced */
long wal_fpi; /* # of WAL full page images produced */
uint64 wal_bytes; /* size of WAL records produced */
@ -178,8 +183,7 @@ typedef struct WalUsage
#endif
typedef enum pgsmStoreKind
{
typedef enum pgsmStoreKind {
PGSM_INVALID = -1,
/*
@ -202,8 +206,7 @@ typedef enum pgsmStoreKind
/*
* Type of aggregate keys
*/
typedef enum AGG_KEY
{
typedef enum AGG_KEY {
AGG_KEY_DATABASE = 0,
AGG_KEY_USER,
AGG_KEY_HOST
@ -212,8 +215,7 @@ typedef enum AGG_KEY
#define MAX_QUERY_LEN 1024
/* shared memory storage for the query */
typedef struct CallTime
{
typedef struct CallTime {
double total_time; /* total execution time, in msec */
double min_time; /* minimum execution time in msec */
double max_time; /* maximum execution time in msec */
@ -222,15 +224,13 @@ typedef struct CallTime
} CallTime;
typedef struct PlanInfo
{
typedef struct PlanInfo {
uint64 planid; /* plan identifier */
char plan_text[PLAN_TEXT_LEN]; /* plan text */
size_t plan_len; /* strlen(plan_text) */
} PlanInfo;
typedef struct pgsmHashKey
{
typedef struct pgsmHashKey {
uint64 bucket_id; /* bucket number */
uint64 queryid; /* query identifier */
uint64 planid; /* plan identifier */
@ -241,8 +241,7 @@ typedef struct pgsmHashKey
bool toplevel; /* query executed at top level */
} pgsmHashKey;
typedef struct QueryInfo
{
typedef struct QueryInfo {
uint64 parentid; /* parent queryid of current query */
dsa_pointer parent_query;
int64 type; /* type of query, options are query, info,
@ -256,23 +255,20 @@ typedef struct QueryInfo
* SELECT/UPDATE/DELETE/INSERT */
} QueryInfo;
typedef struct ErrorInfo
{
typedef struct ErrorInfo {
int64 elevel; /* error elevel */
char sqlcode[SQLCODE_LEN]; /* error sqlcode */
char message[ERROR_MESSAGE_LEN]; /* error message text */
} ErrorInfo;
typedef struct Calls
{
typedef struct Calls {
int64 calls; /* # of times executed */
int64 rows; /* total # of retrieved or affected rows */
double usage; /* usage factor */
} Calls;
typedef struct Blocks
{
typedef struct Blocks {
int64 shared_blks_hit; /* # of shared buffer hits */
int64 shared_blks_read; /* # of shared disk blocks read */
int64 shared_blks_dirtied; /* # of shared disk blocks dirtied */
@ -286,7 +282,8 @@ typedef struct Blocks
double blk_read_time; /* time spent reading, in msec */
double blk_write_time; /* time spent writing, in msec */
double temp_blk_read_time; /* time spent reading temp blocks, in msec */
double temp_blk_read_time; /* time spent reading temp blocks, in
* msec */
double temp_blk_write_time; /* time spent writing temp blocks, in
* msec */
@ -296,22 +293,23 @@ typedef struct Blocks
*/
instr_time instr_blk_read_time; /* time spent reading blocks */
instr_time instr_blk_write_time; /* time spent writing blocks */
instr_time instr_temp_blk_read_time; /* time spent reading temp blocks */
instr_time instr_temp_blk_write_time; /* time spent writing temp blocks */
instr_time instr_temp_blk_read_time; /* time spent reading temp
* blocks */
instr_time instr_temp_blk_write_time; /* time spent writing temp
* blocks */
} Blocks;
typedef struct JitInfo
{
typedef struct JitInfo {
int64 jit_functions; /* total number of JIT functions emitted */
double jit_generation_time; /* total time to generate jit code */
int64 jit_inlining_count; /* number of times inlining time has been
* > 0 */
int64 jit_inlining_count; /* number of times inlining time has
* been > 0 */
double jit_inlining_time; /* total time to inline jit code */
int64 jit_optimization_count; /* number of times optimization time
* has been > 0 */
double jit_optimization_time; /* total time to optimize jit code */
int64 jit_emission_count; /* number of times emission time has been
* > 0 */
int64 jit_emission_count; /* number of times emission time has
* been > 0 */
double jit_emission_time; /* total time to emit jit code */
/*
@ -324,21 +322,18 @@ typedef struct JitInfo
instr_time instr_emission_counter; /* emission counter */
} JitInfo;
typedef struct SysInfo
{
typedef struct SysInfo {
double utime; /* user cpu time */
double stime; /* system cpu time */
} SysInfo;
typedef struct Wal_Usage
{
typedef struct Wal_Usage {
int64 wal_records; /* # of WAL records generated */
int64 wal_fpi; /* # of WAL full page images generated */
uint64 wal_bytes; /* total amount of WAL bytes generated */
} Wal_Usage;
typedef struct Counters
{
typedef struct Counters {
Calls calls;
QueryInfo info;
CallTime time;
@ -361,8 +356,7 @@ typedef struct Counters
/*
* Statistics per statement
*/
typedef struct pgsmEntry
{
typedef struct pgsmEntry {
pgsmHashKey key; /* hash key of entry - MUST BE FIRST */
uint64 pgsm_query_id; /* pgsm generate normalized query hash */
char datname[NAMEDATALEN]; /* database name */
@ -370,18 +364,16 @@ typedef struct pgsmEntry
Counters counters; /* the statistics for this query */
int encoding; /* query text encoding */
slock_t mutex; /* protects the counters only */
union
{
union {
dsa_pointer query_pos; /* query location within query buffer */
char* query_pointer;
}query_text;
char *query_pointer;
} query_text;
} pgsmEntry;
/*
* Global shared state
*/
typedef struct pgsmSharedState
{
typedef struct pgsmSharedState {
LWLock *lock; /* protects hashtable search/modification */
slock_t mutex; /* protects following fields only: */
pg_atomic_uint64 current_wbucket;
@ -393,34 +385,33 @@ typedef struct pgsmSharedState
* dshash also lives in this memory when
* USE_DYNAMIC_HASH is enabled */
PGSM_HASH_TABLE_HANDLE hash_handle;
/* hash table handle. can be either
* classic shared memory hash or dshash
/*
* hash table handle. can be either classic shared memory hash or dshash
* (if we are using USE_DYNAMIC_HASH)
*/
MemoryContext pgsm_mem_cxt;
/* context to store stats in local
* memory until they are pushed to shared hash
/*
* context to store stats in local memory until they are pushed to shared
* hash
*/
int resp_calls[MAX_RESPONSE_BUCKET + 2]; /* execution time's in
* msec; including 2 outlier buckets */
* msec; including 2
* outlier buckets */
bool pgsm_oom;
} pgsmSharedState;
typedef struct pgsmLocalState
{
typedef struct pgsmLocalState {
pgsmSharedState *shared_pgsmState;
dsa_area *dsa; /* local dsa area for backend attached to the
* dsa area created by postmaster at startup.
*/
* dsa area created by postmaster at startup. */
PGSM_HASH_TABLE *shared_hash;
}pgsmLocalState;
} pgsmLocalState;
#if PG_VERSION_NUM < 140000
/*
* Struct for tracking locations/lengths of constants during normalization
*/
typedef struct LocationLen
{
typedef struct LocationLen {
int location; /* start offset in query text */
int length; /* length in bytes, or -1 to ignore */
} LocationLen;
@ -429,8 +420,7 @@ typedef struct LocationLen
* Working state for computing a query jumble and producing a normalized
* query string
*/
typedef struct JumbleState
{
typedef struct JumbleState {
/* Jumble of current query tree */
unsigned char *jumble;
@ -468,7 +458,7 @@ pgsmSharedState *pgsm_get_ss(void);
void hash_query_entries();
void hash_query_entry_dealloc(int new_bucket_id, int old_bucket_id, unsigned char *query_buffer[]);
void hash_entry_dealloc(int new_bucket_id, int old_bucket_id, unsigned char *query_buffer);
pgsmEntry *hash_entry_alloc(pgsmSharedState *pgsm, pgsmHashKey *key, int encoding);
pgsmEntry *hash_entry_alloc(pgsmSharedState * pgsm, pgsmHashKey * key, int encoding);
Size pgsm_ShmemSize(void);
void pgsm_startup(void);
@ -480,8 +470,7 @@ void init_guc(void);
/* GUC variables*/
/*---- GUC variables ----*/
typedef enum
{
typedef enum {
PSGM_TRACK_NONE = 0, /* track no statements */
PGSM_TRACK_TOP, /* only top level statements */
PGSM_TRACK_ALL /* all statements, including nested ones */
@ -494,8 +483,7 @@ static const struct config_enum_entry track_options[] =
{NULL, 0, false}
};
typedef enum
{
typedef enum {
HISTOGRAM_START,
HISTOGRAM_END,
HISTOGRAM_COUNT
@ -524,9 +512,9 @@ extern int pgsm_track;
#define HOOK_STATS_SIZE 0
#endif
void *pgsm_hash_find_or_insert(PGSM_HASH_TABLE *shared_hash, pgsmHashKey *key, bool* found);
void *pgsm_hash_find(PGSM_HASH_TABLE *shared_hash, pgsmHashKey *key, bool* found);
void pgsm_hash_seq_init(PGSM_HASH_SEQ_STATUS *hstat, PGSM_HASH_TABLE *shared_hash, bool lock);
void *pgsm_hash_seq_next(PGSM_HASH_SEQ_STATUS *hstat);
void pgsm_hash_seq_term(PGSM_HASH_SEQ_STATUS *hstat);
void pgsm_hash_delete_current(PGSM_HASH_SEQ_STATUS *hstat, PGSM_HASH_TABLE *shared_hash, void *key);
void *pgsm_hash_find_or_insert(PGSM_HASH_TABLE * shared_hash, pgsmHashKey * key, bool *found);
void *pgsm_hash_find(PGSM_HASH_TABLE * shared_hash, pgsmHashKey * key, bool *found);
void pgsm_hash_seq_init(PGSM_HASH_SEQ_STATUS * hstat, PGSM_HASH_TABLE * shared_hash, bool lock);
void *pgsm_hash_seq_next(PGSM_HASH_SEQ_STATUS * hstat);
void pgsm_hash_seq_term(PGSM_HASH_SEQ_STATUS * hstat);
void pgsm_hash_delete_current(PGSM_HASH_SEQ_STATUS * hstat, PGSM_HASH_TABLE * shared_hash, void *key);