Get `gn gen` to succeed on Windows

third_party/sqlite/src/test/thread_common.tcl

Index: third_party/sqlite/src/test/thread_common.tcl
diff --git a/third_party/sqlite/src/test/thread_common.tcl b/third_party/sqlite/src/test/thread_common.tcl
new file mode 100644
index 0000000000000000000000000000000000000000..6b17082ad4508528d2fd2d6686996c682bf7e89a
--- /dev/null
+++ b/third_party/sqlite/src/test/thread_common.tcl
@@ -0,0 +1,110 @@
+# 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
+