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mdbx: add cursor_is_tracked() and assertions.

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Change-Id: I83db1a714597b134aa30e4ca7019bb7f541a2428
This commit is contained in:
Leonid Yuriev 2020-11-02 19:10:01 +03:00
parent 10681a53ae
commit 0c78da99b0
1 changed files with 11 additions and 0 deletions
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11
src/core.c
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@ -3599,11 +3599,20 @@ static __maybe_unused void mdbx_page_list(MDBX_page *mp) {
(mc)->mc_xcursor->mx_cursor.mc_pg[0] = node_data(xr_node); \
} while (0)
static __maybe_unused bool cursor_is_tracked(const MDBX_cursor *mc) {
for (MDBX_cursor *scan = mc->mc_txn->mt_cursors[mc->mc_dbi]; scan;
scan = scan->mc_next)
if (mc == ((mc->mc_flags & C_SUB) ? &scan->mc_xcursor->mx_cursor : scan))
return true;
return false;
}
/* Perform act while tracking temporary cursor mn */
#define WITH_CURSOR_TRACKING(mn, act) \
do { \
mdbx_cassert(&(mn), \
mn.mc_txn->mt_cursors != NULL /* must be not rdonly txt */); \
mdbx_cassert(&(mn), !cursor_is_tracked(&(mn))); \
MDBX_cursor mc_dummy; \
MDBX_cursor **tracking_head = &(mn).mc_txn->mt_cursors[mn.mc_dbi]; \
MDBX_cursor *tracked = &(mn); \
@ -12583,6 +12592,7 @@ int mdbx_cursor_put(MDBX_cursor *mc, const MDBX_val *key, MDBX_val *data,
if (unlikely(rc != MDBX_SUCCESS))
return rc;
mdbx_cassert(mc, cursor_is_tracked(mc));
env = mc->mc_txn->mt_env;
/* Check this first so counter will always be zero on any early failures. */
@ -15472,6 +15482,7 @@ static int mdbx_cursor_del0(MDBX_cursor *mc) {
unsigned nkeys;
MDBX_dbi dbi = mc->mc_dbi;
mdbx_cassert(mc, cursor_is_tracked(mc));
mdbx_cassert(mc, IS_LEAF(mc->mc_pg[mc->mc_top]));
ki = mc->mc_ki[mc->mc_top];
mp = mc->mc_pg[mc->mc_top];