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+# 2007 September 10
+#
+# 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.
+#
+#***********************************************************************
+#
+# $Id: thread_common.tcl,v 1.5 2009/03/26 14:48:07 danielk1977 Exp $
+
+if {[info exists ::thread_procs]} {
+ return 0
+}
+
+# The following script is sourced by every thread spawned using
+# [sqlthread spawn]:
+set thread_procs {
+
+ # Execute the supplied SQL using database handle $::DB.
+ #
+ proc execsql {sql} {
+
+ set rc SQLITE_LOCKED
+ while {$rc eq "SQLITE_LOCKED"
+ || $rc eq "SQLITE_BUSY"
+ || $rc eq "SQLITE_SCHEMA"} {
+ set res [list]
+
+ enter_db_mutex $::DB
+ set err [catch {
+ set ::STMT [sqlite3_prepare_v2 $::DB $sql -1 dummy_tail]
+ } msg]
+
+ if {$err == 0} {
+ while {[set rc [sqlite3_step $::STMT]] eq "SQLITE_ROW"} {
+ for {set i 0} {$i < [sqlite3_column_count $::STMT]} {incr i} {
+ lappend res [sqlite3_column_text $::STMT 0]
+ }
+ }
+ set rc [sqlite3_finalize $::STMT]
+ } else {
+ if {[lindex $msg 0]=="(6)"} {
+ set rc SQLITE_LOCKED
+ } else {
+ set rc SQLITE_ERROR
+ }
+ }
+
+ if {[string first locked [sqlite3_errmsg $::DB]]>=0} {
+ set rc SQLITE_LOCKED
+ }
+ if {$rc ne "SQLITE_OK"} {
+ set errtxt "$rc - [sqlite3_errmsg $::DB] (debug1)"
+ }
+ leave_db_mutex $::DB
+
+ if {$rc eq "SQLITE_LOCKED" || $rc eq "SQLITE_BUSY"} {
+ #sqlthread parent "puts \"thread [sqlthread id] is busy. rc=$rc\""
+ after 200
+ } else {
+ #sqlthread parent "puts \"thread [sqlthread id] ran $sql\""
+ }
+ }
+
+ if {$rc ne "SQLITE_OK"} {
+ error $errtxt
+ }
+ set res
+ }
+
+ proc do_test {name script result} {
+ set res [eval $script]
+ if {$res ne $result} {
+ error "$name failed: expected \"$result\" got \"$res\""
+ }
+ }
+}
+
+proc thread_spawn {varname args} {
+ sqlthread spawn $varname [join $args {;}]
+}
+
+# Return true if this build can run the multi-threaded tests.
+#
+proc run_thread_tests {{print_warning 0}} {
+ ifcapable !mutex {
+ set zProblem "SQLite build is not threadsafe"
+ }
+ ifcapable mutex_noop {
+ set zProblem "SQLite build uses SQLITE_MUTEX_NOOP"
+ }
+ if {[info commands sqlthread] eq ""} {
+ set zProblem "SQLite build is not threadsafe"
+ }
+ if {![info exists ::tcl_platform(threaded)]} {
+ set zProblem "Linked against a non-threadsafe Tcl build"
+ }
+ if {[info exists zProblem]} {
+ puts "WARNING: Multi-threaded tests skipped: $zProblem"
+ return 0
+ }
+ set ::run_thread_tests_called 1
+ return 1;
+}
+
+return 0
+