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mdbx: рефакторинг/вычленение txn_basal_create/destroy().

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This commit is contained in:
Леонид Юрьев (Leonid Yuriev) 2025-01-05 20:57:13 +03:00
parent 67460dd0fd
commit b681b59434
4 changed files with 50 additions and 36 deletions
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33
src/api-env.c
View File

@ -482,39 +482,12 @@ __cold int mdbx_env_openW(MDBX_env *env, const wchar_t *pathname, MDBX_env_flags
}
if ((flags & MDBX_RDONLY) == 0) {
MDBX_txn *txn = nullptr;
const intptr_t bitmap_bytes =
#if MDBX_ENABLE_DBI_SPARSE
ceil_powerof2(env->max_dbi, CHAR_BIT * sizeof(txn->dbi_sparse[0])) / CHAR_BIT;
#else
0;
#endif /* MDBX_ENABLE_DBI_SPARSE */
const size_t base = sizeof(MDBX_txn) + sizeof(cursor_couple_t);
const size_t size = base + bitmap_bytes +
env->max_dbi * (sizeof(txn->dbs[0]) + sizeof(txn->cursors[0]) + sizeof(txn->dbi_seqs[0]) +
sizeof(txn->dbi_state[0]));
txn = osal_calloc(1, size);
if (unlikely(!txn)) {
rc = MDBX_ENOMEM;
goto bailout;
}
txn->dbs = ptr_disp(txn, base);
txn->cursors = ptr_disp(txn->dbs, env->max_dbi * sizeof(txn->dbs[0]));
txn->dbi_seqs = ptr_disp(txn->cursors, env->max_dbi * sizeof(txn->cursors[0]));
txn->dbi_state = ptr_disp(txn, size - env->max_dbi * sizeof(txn->dbi_state[0]));
#if MDBX_ENABLE_DBI_SPARSE
txn->dbi_sparse = ptr_disp(txn->dbi_state, -bitmap_bytes);
#endif /* MDBX_ENABLE_DBI_SPARSE */
txn->env = env;
txn->flags = MDBX_TXN_FINISHED;
env->basal_txn = txn;
txn->tw.retired_pages = pnl_alloc(MDBX_PNL_INITIAL);
txn->tw.repnl = pnl_alloc(MDBX_PNL_INITIAL);
if (unlikely(!txn->tw.retired_pages || !txn->tw.repnl)) {
env->basal_txn = txn_basal_create(env->max_dbi);
if (unlikely(!env->basal_txn)) {
rc = MDBX_ENOMEM;
goto bailout;
}
env->basal_txn->env = env;
env_options_adjust_defaults(env);
}

7
src/env.c
View File

@ -588,12 +588,7 @@ __cold int env_close(MDBX_env *env, bool resurrect_after_fork) {
env->pathname.buffer = nullptr;
}
if (env->basal_txn) {
dpl_free(env->basal_txn);
txl_free(env->basal_txn->tw.gc.retxl);
pnl_free(env->basal_txn->tw.retired_pages);
pnl_free(env->basal_txn->tw.spilled.list);
pnl_free(env->basal_txn->tw.repnl);
osal_free(env->basal_txn);
txn_basal_destroy(env->basal_txn);
env->basal_txn = nullptr;
}
}

2
src/proto.h
View File

@ -70,6 +70,8 @@ MDBX_INTERNAL int txn_end(MDBX_txn *txn, unsigned mode);
MDBX_INTERNAL int txn_write(MDBX_txn *txn, iov_ctx_t *ctx);
MDBX_INTERNAL void txn_take_gcprof(const MDBX_txn *txn, MDBX_commit_latency *latency);
MDBX_INTERNAL void txn_merge(MDBX_txn *const parent, MDBX_txn *const txn, const size_t parent_retired_len);
MDBX_INTERNAL MDBX_txn *txn_basal_create(const size_t max_dbi);
MDBX_INTERNAL void txn_basal_destroy(MDBX_txn *txn);
/* env.c */
MDBX_INTERNAL int env_open(MDBX_env *env, mdbx_mode_t mode);

44
src/txn.c
View File

@ -1080,3 +1080,47 @@ int txn_unpark(MDBX_txn *txn) {
int err = txn_end(txn, TXN_END_OUSTED | TXN_END_RESET | TXN_END_UPDATE);
return err ? err : MDBX_OUSTED;
}
MDBX_txn *txn_basal_create(const size_t max_dbi) {
MDBX_txn *txn = nullptr;
const intptr_t bitmap_bytes =
#if MDBX_ENABLE_DBI_SPARSE
ceil_powerof2(max_dbi, CHAR_BIT * sizeof(txn->dbi_sparse[0])) / CHAR_BIT;
#else
0;
#endif /* MDBX_ENABLE_DBI_SPARSE */
const size_t base = sizeof(MDBX_txn) + /* GC cursor */ sizeof(cursor_couple_t);
const size_t size =
base + bitmap_bytes +
max_dbi * (sizeof(txn->dbs[0]) + sizeof(txn->cursors[0]) + sizeof(txn->dbi_seqs[0]) + sizeof(txn->dbi_state[0]));
txn = osal_calloc(1, size);
if (unlikely(!txn))
return txn;
txn->dbs = ptr_disp(txn, base);
txn->cursors = ptr_disp(txn->dbs, max_dbi * sizeof(txn->dbs[0]));
txn->dbi_seqs = ptr_disp(txn->cursors, max_dbi * sizeof(txn->cursors[0]));
txn->dbi_state = ptr_disp(txn, size - max_dbi * sizeof(txn->dbi_state[0]));
#if MDBX_ENABLE_DBI_SPARSE
txn->dbi_sparse = ptr_disp(txn->dbi_state, -bitmap_bytes);
#endif /* MDBX_ENABLE_DBI_SPARSE */
txn->flags = MDBX_TXN_FINISHED;
txn->tw.retired_pages = pnl_alloc(MDBX_PNL_INITIAL);
txn->tw.repnl = pnl_alloc(MDBX_PNL_INITIAL);
if (unlikely(!txn->tw.retired_pages || !txn->tw.repnl)) {
txn_basal_destroy(txn);
txn = nullptr;
}
return txn;
}
void txn_basal_destroy(MDBX_txn *txn) {
dpl_free(txn);
txl_free(txn->tw.gc.retxl);
pnl_free(txn->tw.retired_pages);
pnl_free(txn->tw.spilled.list);
pnl_free(txn->tw.repnl);
osal_free(txn);
}