Import SQLite 3.7.6.3.

third_party/sqlite/src/test/async.test

Index: third_party/sqlite/src/test/async.test
diff --git a/third_party/sqlite/src/test/async.test b/third_party/sqlite/src/test/async.test
index 835d39c766e915e777f1468d161c0a43bab96f80..f1d641da7a9b11aa49008b3d060b122efaa584c2 100644
--- a/third_party/sqlite/src/test/async.test
+++ b/third_party/sqlite/src/test/async.test
@@ -23,8 +23,8 @@ proc finish_test {} {
   catch {db2 close}
   catch {db3 close}
 }
-if {[info exists ISQUICK]} { set ASYNC_SAVE_ISQUICK $ISQUICK }
-set ISQUICK 1
+if {[info exists G(isquick)]} { set ASYNC_SAVE_ISQUICK $G(isquick) }
+set G(isquick) 1
 
 set ASYNC_INCLUDE {
   insert.test
@@ -43,15 +43,24 @@ set ASYNC_INCLUDE {
 # Enable asynchronous IO.
 sqlite3async_initialize "" 1
 
-rename do_test async_really_do_test
-proc do_test {name args} {
-  uplevel async_really_do_test async_io-$name $args
-  sqlite3async_start
+# This proc flushes the contents of the async-IO queue through to the 
+# underlying VFS. A couple of the test scripts identified in $ASYNC_INCLUDE
+# above contain lines like "catch flush_async_queue" in places where 
+# this is required for the tests to work in async mode.
+#
+proc flush_async_queue {} {
   sqlite3async_control halt idle
+  sqlite3async_start
   sqlite3async_wait
   sqlite3async_control halt never
 }
 
+rename do_test async_really_do_test
+proc do_test {name args} {
+  uplevel async_really_do_test async_io-$name $args
+  flush_async_queue
+}
+
 foreach testfile [lsort -dictionary [glob $testdir/*.test]] {
   set tail [file tail $testfile]
   if {[lsearch -exact $ASYNC_INCLUDE $tail]<0} continue
@@ -62,19 +71,13 @@ foreach testfile [lsort -dictionary [glob $testdir/*.test]] {
   # [file delete]). If the asynchronous backend still has the file
   # open, it will become confused.
   #
-  sqlite3async_control halt idle
-  sqlite3async_start
-  sqlite3async_wait
-  sqlite3async_control halt never
+  flush_async_queue
 }
 
 # Flush the write-queue and disable asynchronous IO. This should ensure
 # all allocated memory is cleaned up.
 set sqlite3async_trace 1
-sqlite3async_control halt idle
-sqlite3async_start
-sqlite3async_wait
-sqlite3async_control halt never
+flush_async_queue
 sqlite3async_shutdown
 set sqlite3async_trace 0
 
@@ -83,5 +86,5 @@ rename async_really_do_test do_test
 rename finish_test {}
 rename async_really_finish_test finish_test
 
-if {[info exists ASYNC_SAVE_ISQUICK]} { set ISQUICK $ASYNC_SAVE_ISQUICK }
+if {[info exists ASYNC_SAVE_ISQUICK]} { set G(isquick) $ASYNC_SAVE_ISQUICK }
 finish_test