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# 2023 May 13
#
# The author disclaims copyright to this source code. In place of
# a legal notice, here is a blessing:
#
# May you do good and not evil.
# May you find forgiveness for yourself and forgive others.
# May you share freely, never taking more than you give.
#
#***********************************************************************
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
source $testdir/lock_common.tcl
if {[run_thread_tests]==0} { finish_test ; return }
set testprefix thread3
do_execsql_test 1.0 {
CREATE TABLE t1(a, b);
PRAGMA journal_mode = DELETE;
} {delete}
proc wait_for_var {varname} {
if {0==[uplevel [list info exists $varname]]} {
uplevel [list vwait $varname]
}
uplevel [list set $varname]
}
set nAttempt 250
do_test 1.1 {
for {set i 0} {$i < $nAttempt} {incr i} {
unset -nocomplain X
unset -nocomplain Y
sqlthread spawn X {
sqlite3 dbI test.db
dbI timeout 100
set rc 1
set nBusy 0
while {$rc} {
set rc [catch {
dbI eval { INSERT INTO t1 VALUES(203, 'message') RETURNING a; }
} msg]
if {$rc} { incr nBusy }
}
dbI close
set nBusy
}
sqlthread spawn Y {
sqlite3 dbR test.db
catch {
dbR eval { SELECT count(*) FROM t1 }
} msg
dbR close
set msg
}
wait_for_var X
wait_for_var Y
incr nTotalBusy $X
}
execsql { SELECT count(*) FROM t1 }
set {} {}
} {}
do_execsql_test "1.Total BUSY errors: $nTotalBusy .2" {
SELECT count(*) FROM t1;
} $nAttempt
finish_test
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