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Play games with object file layout

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Use gcc section attribute to keep less frequently used functions
away from main code.
incre
Howard Chu 11 years ago
parent 3e98addbe2
commit 7d996d7f3d
1 changed files with 51 additions and 39 deletions
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  1. 90
      libraries/liblmdb/mdb.c

90
libraries/liblmdb/mdb.c
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@ -150,6 +150,13 @@
# error "Two's complement, reasonably sized integer types, please"
#endif
#ifdef __GNUC__
/** Put infrequently used env functions in separate section */
#define ESECT __attribute__ ((section("text_env")))
#else
#define ESECT
#endif
/** @defgroup internal LMDB Internals
* @{
*/
@ -3256,7 +3263,7 @@ fail:
* @param[out] meta address of where to store the meta information
* @return 0 on success, non-zero on failure.
*/
static int
static int ESECT
mdb_env_read_header(MDB_env *env, MDB_meta *meta)
{
MDB_metabuf pbuf;
@ -3314,7 +3321,7 @@ mdb_env_read_header(MDB_env *env, MDB_meta *meta)
return 0;
}
static void
static void ESECT
mdb_env_init_meta0(MDB_env *env, MDB_meta *meta)
{
meta->mm_magic = MDB_MAGIC;
@ -3333,7 +3340,7 @@ mdb_env_init_meta0(MDB_env *env, MDB_meta *meta)
* @param[out] meta address of where to store the meta information
* @return 0 on success, non-zero on failure.
*/
static int
static int ESECT
mdb_env_init_meta(MDB_env *env, MDB_meta *meta)
{
MDB_page *p, *q;
@ -3513,7 +3520,7 @@ mdb_env_pick_meta(const MDB_env *env)
return (env->me_metas[0]->mm_txnid < env->me_metas[1]->mm_txnid);
}
int
int ESECT
mdb_env_create(MDB_env **env)
{
MDB_env *e;
@ -3538,7 +3545,7 @@ mdb_env_create(MDB_env **env)
return MDB_SUCCESS;
}
static int
static int ESECT
mdb_env_map(MDB_env *env, void *addr, int newsize)
{
MDB_page *p;
@ -3621,7 +3628,7 @@ mdb_env_map(MDB_env *env, void *addr, int newsize)
return MDB_SUCCESS;
}
int
int ESECT
mdb_env_set_mapsize(MDB_env *env, size_t size)
{
/* If env is already open, caller is responsible for making
@ -3655,7 +3662,7 @@ mdb_env_set_mapsize(MDB_env *env, size_t size)
return MDB_SUCCESS;
}
int
int ESECT
mdb_env_set_maxdbs(MDB_env *env, MDB_dbi dbs)
{
if (env->me_map)
@ -3664,7 +3671,7 @@ mdb_env_set_maxdbs(MDB_env *env, MDB_dbi dbs)
return MDB_SUCCESS;
}
int
int ESECT
mdb_env_set_maxreaders(MDB_env *env, unsigned int readers)
{
if (env->me_map || readers < 1)
@ -3673,7 +3680,7 @@ mdb_env_set_maxreaders(MDB_env *env, unsigned int readers)
return MDB_SUCCESS;
}
int
int ESECT
mdb_env_get_maxreaders(MDB_env *env, unsigned int *readers)
{
if (!env || !readers)
@ -3684,7 +3691,7 @@ mdb_env_get_maxreaders(MDB_env *env, unsigned int *readers)
/** Further setup required for opening an LMDB environment
*/
static int
static int ESECT
mdb_env_open2(MDB_env *env)
{
unsigned int flags = env->me_flags;
@ -3841,7 +3848,7 @@ PIMAGE_TLS_CALLBACK mdb_tls_cbp = mdb_tls_callback;
#endif
/** Downgrade the exclusive lock on the region back to shared */
static int
static int ESECT
mdb_env_share_locks(MDB_env *env, int *excl)
{
int rc = 0, toggle = mdb_env_pick_meta(env);
@ -3883,7 +3890,7 @@ mdb_env_share_locks(MDB_env *env, int *excl)
/** Try to get exlusive lock, otherwise shared.
* Maintain *excl = -1: no/unknown lock, 0: shared, 1: exclusive.
*/
static int
static int ESECT
mdb_env_excl_lock(MDB_env *env, int *excl)
{
int rc = 0;
@ -4025,7 +4032,7 @@ mdb_hash_enc(MDB_val *val, char *encbuf)
* @param[in,out] excl In -1, out lock type: -1 none, 0 shared, 1 exclusive
* @return 0 on success, non-zero on failure.
*/
static int
static int ESECT
mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl)
{
#ifdef _WIN32
@ -4255,7 +4262,7 @@ fail:
# error "Persistent DB flags & env flags overlap, but both go in mm_flags"
#endif
int
int ESECT
mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mdb_mode_t mode)
{
int oflags, rc, len, excl = -1;
@ -4383,7 +4390,7 @@ leave:
}
/** Destroy resources from mdb_env_open(), clear our readers & DBIs */
static void
static void ESECT
mdb_env_close0(MDB_env *env, int excl)
{
int i;
@ -4472,7 +4479,7 @@ mdb_env_close0(MDB_env *env, int excl)
}
void
void ESECT
mdb_env_close(MDB_env *env)
{
MDB_page *dp;
@ -8055,7 +8062,7 @@ typedef struct mdb_copy {
} mdb_copy;
/** Dedicated writer thread for compacting copy. */
static THREAD_RET
static THREAD_RET ESECT
mdb_env_copythr(void *arg)
{
mdb_copy *my = arg;
@ -8120,7 +8127,7 @@ again:
}
/** Tell the writer thread there's a buffer ready to write */
static int
static int ESECT
mdb_env_cthr_toggle(mdb_copy *my, int st)
{
int toggle = my->mc_toggle ^ 1;
@ -8139,7 +8146,7 @@ mdb_env_cthr_toggle(mdb_copy *my, int st)
}
/** Depth-first tree traversal for compacting copy. */
static int
static int ESECT
mdb_env_cwalk(mdb_copy *my, pgno_t *pg, int flags)
{
MDB_cursor mc;
@ -8297,7 +8304,7 @@ done:
}
/** Copy environment with compaction. */
static int
static int ESECT
mdb_env_copyfd1(MDB_env *env, HANDLE fd)
{
MDB_meta *mm;
@ -8418,7 +8425,7 @@ leave:
}
/** Copy environment as-is. */
static int
static int ESECT
mdb_env_copyfd0(MDB_env *env, HANDLE fd)
{
MDB_txn *txn = NULL;
@ -8522,7 +8529,7 @@ leave:
return rc;
}
int
int ESECT
mdb_env_copyfd2(MDB_env *env, HANDLE fd, unsigned int flags)
{
if (flags & MDB_CP_COMPACT)
@ -8531,13 +8538,13 @@ mdb_env_copyfd2(MDB_env *env, HANDLE fd, unsigned int flags)
return mdb_env_copyfd0(env, fd);
}
int
int ESECT
mdb_env_copyfd(MDB_env *env, HANDLE fd)
{
return mdb_env_copyfd2(env, fd, 0);
}
int
int ESECT
mdb_env_copy2(MDB_env *env, const char *path, unsigned int flags)
{
int rc, len;
@ -8595,13 +8602,13 @@ leave:
return rc;
}
int
int ESECT
mdb_env_copy(MDB_env *env, const char *path)
{
return mdb_env_copy2(env, path, 0);
}
int
int ESECT
mdb_env_set_flags(MDB_env *env, unsigned int flag, int onoff)
{
if ((flag & CHANGEABLE) != flag)
@ -8613,7 +8620,7 @@ mdb_env_set_flags(MDB_env *env, unsigned int flag, int onoff)
return MDB_SUCCESS;
}
int
int ESECT
mdb_env_get_flags(MDB_env *env, unsigned int *arg)
{
if (!env || !arg)
@ -8623,7 +8630,7 @@ mdb_env_get_flags(MDB_env *env, unsigned int *arg)
return MDB_SUCCESS;
}
int
int ESECT
mdb_env_set_userctx(MDB_env *env, void *ctx)
{
if (!env)
@ -8632,13 +8639,13 @@ mdb_env_set_userctx(MDB_env *env, void *ctx)
return MDB_SUCCESS;
}
void *
void * ESECT
mdb_env_get_userctx(MDB_env *env)
{
return env ? env->me_userctx : NULL;
}
int
int ESECT
mdb_env_set_assert(MDB_env *env, MDB_assert_func *func)
{
if (!env)
@ -8649,7 +8656,7 @@ mdb_env_set_assert(MDB_env *env, MDB_assert_func *func)
return MDB_SUCCESS;
}
int
int ESECT
mdb_env_get_path(MDB_env *env, const char **arg)
{
if (!env || !arg)
@ -8659,7 +8666,7 @@ mdb_env_get_path(MDB_env *env, const char **arg)
return MDB_SUCCESS;
}
int
int ESECT
mdb_env_get_fd(MDB_env *env, mdb_filehandle_t *arg)
{
if (!env || !arg)
@ -8675,7 +8682,7 @@ mdb_env_get_fd(MDB_env *env, mdb_filehandle_t *arg)
* @param[out] arg the address of an #MDB_stat structure to receive the stats.
* @return 0, this function always succeeds.
*/
static int
static int ESECT
mdb_stat0(MDB_env *env, MDB_db *db, MDB_stat *arg)
{
arg->ms_psize = env->me_psize;
@ -8687,7 +8694,8 @@ mdb_stat0(MDB_env *env, MDB_db *db, MDB_stat *arg)
return MDB_SUCCESS;
}
int
int ESECT
mdb_env_stat(MDB_env *env, MDB_stat *arg)
{
int toggle;
@ -8700,7 +8708,7 @@ mdb_env_stat(MDB_env *env, MDB_stat *arg)
return mdb_stat0(env, &env->me_metas[toggle]->mm_dbs[MAIN_DBI], arg);
}
int
int ESECT
mdb_env_info(MDB_env *env, MDB_envinfo *arg)
{
int toggle;
@ -9057,12 +9065,14 @@ int mdb_set_relctx(MDB_txn *txn, MDB_dbi dbi, void *ctx)
return MDB_SUCCESS;
}
int mdb_env_get_maxkeysize(MDB_env *env)
int ESECT
mdb_env_get_maxkeysize(MDB_env *env)
{
return ENV_MAXKEY(env);
}
int mdb_reader_list(MDB_env *env, MDB_msg_func *func, void *ctx)
int ESECT
mdb_reader_list(MDB_env *env, MDB_msg_func *func, void *ctx)
{
unsigned int i, rdrs;
MDB_reader *mr;
@ -9102,7 +9112,8 @@ int mdb_reader_list(MDB_env *env, MDB_msg_func *func, void *ctx)
/** Insert pid into list if not already present.
* return -1 if already present.
*/
static int mdb_pid_insert(MDB_PID_T *ids, MDB_PID_T pid)
static int ESECT
mdb_pid_insert(MDB_PID_T *ids, MDB_PID_T pid)
{
/* binary search of pid in list */
unsigned base = 0;
@ -9138,7 +9149,8 @@ static int mdb_pid_insert(MDB_PID_T *ids, MDB_PID_T pid)
return 0;
}
int mdb_reader_check(MDB_env *env, int *dead)
int ESECT
mdb_reader_check(MDB_env *env, int *dead)
{
unsigned int i, j, rdrs;
MDB_reader *mr;

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