mdbx: изменение лицензии и реструктуризация исходного кода.

2025-11-07 07:18:56 +08:00 · 2024-05-19 22:07:58 +03:00
parent e9f5c0c308
commit 3de3d425a1
139 changed files with 34551 additions and 33907 deletions
--- a/src/spill.h
+++ b/src/spill.h
@@ -0,0 +1,86 @@
+/// \copyright SPDX-License-Identifier: Apache-2.0
+/// \author Леонид Юрьев aka Leonid Yuriev <leo@yuriev.ru> \date 2015-2024
+
+#pragma once
+
+#include "essentials.h"
+
+MDBX_INTERNAL void spill_remove(MDBX_txn *txn, size_t idx, size_t npages);
+MDBX_INTERNAL pnl_t spill_purge(MDBX_txn *txn);
+MDBX_INTERNAL int spill_slowpath(MDBX_txn *const txn, MDBX_cursor *const m0,
+                                 const intptr_t wanna_spill_entries,
+                                 const intptr_t wanna_spill_npages,
+                                 const size_t need);
+/*----------------------------------------------------------------------------*/
+
+static inline size_t spill_search(const MDBX_txn *txn, pgno_t pgno) {
+  tASSERT(txn, (txn->flags & MDBX_WRITEMAP) == 0 || MDBX_AVOID_MSYNC);
+  const pnl_t pnl = txn->tw.spilled.list;
+  if (likely(!pnl))
+    return 0;
+  pgno <<= 1;
+  size_t n = pnl_search(pnl, pgno, (size_t)MAX_PAGENO + MAX_PAGENO + 1);
+  return (n <= MDBX_PNL_GETSIZE(pnl) && pnl[n] == pgno) ? n : 0;
+}
+
+static inline bool spill_intersect(const MDBX_txn *txn, pgno_t pgno,
+                                   size_t npages) {
+  const pnl_t pnl = txn->tw.spilled.list;
+  if (likely(!pnl))
+    return false;
+  const size_t len = MDBX_PNL_GETSIZE(pnl);
+  if (LOG_ENABLED(MDBX_LOG_EXTRA)) {
+    DEBUG_EXTRA("PNL len %zu [", len);
+    for (size_t i = 1; i <= len; ++i)
+      DEBUG_EXTRA_PRINT(" %li", (pnl[i] & 1) ? -(long)(pnl[i] >> 1)
+                                             : (long)(pnl[i] >> 1));
+    DEBUG_EXTRA_PRINT("%s\n", "]");
+  }
+  const pgno_t spilled_range_begin = pgno << 1;
+  const pgno_t spilled_range_last = ((pgno + (pgno_t)npages) << 1) - 1;
+#if MDBX_PNL_ASCENDING
+  const size_t n =
+      pnl_search(pnl, spilled_range_begin, (size_t)(MAX_PAGENO + 1) << 1);
+  tASSERT(txn, n && (n == MDBX_PNL_GETSIZE(pnl) + 1 ||
+                     spilled_range_begin <= pnl[n]));
+  const bool rc = n <= MDBX_PNL_GETSIZE(pnl) && pnl[n] <= spilled_range_last;
+#else
+  const size_t n =
+      pnl_search(pnl, spilled_range_last, (size_t)MAX_PAGENO + MAX_PAGENO + 1);
+  tASSERT(txn, n && (n == MDBX_PNL_GETSIZE(pnl) + 1 ||
+                     spilled_range_last >= pnl[n]));
+  const bool rc = n <= MDBX_PNL_GETSIZE(pnl) && pnl[n] >= spilled_range_begin;
+#endif
+  if (ASSERT_ENABLED()) {
+    bool check = false;
+    for (size_t i = 0; i < npages; ++i)
+      check |= spill_search(txn, (pgno_t)(pgno + i)) != 0;
+    tASSERT(txn, check == rc);
+  }
+  return rc;
+}
+
+static inline int txn_spill(MDBX_txn *const txn, MDBX_cursor *const m0,
+                            const size_t need) {
+  tASSERT(txn, (txn->flags & MDBX_TXN_RDONLY) == 0);
+  tASSERT(txn, !m0 || cursor_is_tracked(m0));
+
+  const intptr_t wanna_spill_entries =
+      txn->tw.dirtylist ? (need - txn->tw.dirtyroom - txn->tw.loose_count) : 0;
+  const intptr_t wanna_spill_npages =
+      need +
+      (txn->tw.dirtylist ? txn->tw.dirtylist->pages_including_loose
+                         : txn->tw.writemap_dirty_npages) -
+      txn->tw.loose_count - txn->env->options.dp_limit;
+
+  /* production mode */
+  if (likely(wanna_spill_npages < 1 && wanna_spill_entries < 1)
+#if xMDBX_DEBUG_SPILLING == 1
+      /* debug mode: always try to spill if xMDBX_DEBUG_SPILLING == 1 */
+      && txn->txnid % 23 > 11
+#endif
+  )
+    return MDBX_SUCCESS;
+
+  return spill_slowpath(txn, m0, wanna_spill_entries, wanna_spill_npages, need);
+}