/trunk/test/lock_common.tcl |
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# 2010 April 14 |
# |
# 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. |
# |
#*********************************************************************** |
# This file contains code used by several different test scripts. The |
# code in this file allows testfixture to control another process (or |
# processes) to test locking. |
# |
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proc do_multiclient_test {varname script} { |
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foreach code [list { |
if {[info exists ::G(valgrind)]} { db close ; continue } |
set ::code2_chan [launch_testfixture] |
set ::code3_chan [launch_testfixture] |
proc code2 {tcl} { testfixture $::code2_chan $tcl } |
proc code3 {tcl} { testfixture $::code3_chan $tcl } |
set tn 1 |
} { |
proc code2 {tcl} { uplevel #0 $tcl } |
proc code3 {tcl} { uplevel #0 $tcl } |
set tn 2 |
}] { |
faultsim_delete_and_reopen |
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proc code1 {tcl} { uplevel #0 $tcl } |
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# Open connections [db2] and [db3]. Depending on which iteration this |
# is, the connections may be created in this interpreter, or in |
# interpreters running in other OS processes. As such, the [db2] and [db3] |
# commands should only be accessed within [code2] and [code3] blocks, |
# respectively. |
# |
eval $code |
code2 { sqlite3 db2 test.db } |
code3 { sqlite3 db3 test.db } |
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# Shorthand commands. Execute SQL using database connection [db2] or |
# [db3]. Return the results. |
# |
proc sql1 {sql} { db eval $sql } |
proc sql2 {sql} { code2 [list db2 eval $sql] } |
proc sql3 {sql} { code3 [list db3 eval $sql] } |
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proc csql1 {sql} { list [catch { sql1 $sql } msg] $msg } |
proc csql2 {sql} { list [catch { sql2 $sql } msg] $msg } |
proc csql3 {sql} { list [catch { sql3 $sql } msg] $msg } |
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uplevel set $varname $tn |
uplevel $script |
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catch { code2 { db2 close } } |
catch { code3 { db3 close } } |
catch { close $::code2_chan } |
catch { close $::code3_chan } |
catch { db close } |
} |
} |
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# Launch another testfixture process to be controlled by this one. A |
# channel name is returned that may be passed as the first argument to proc |
# 'testfixture' to execute a command. The child testfixture process is shut |
# down by closing the channel. |
proc launch_testfixture {{prg ""}} { |
write_main_loop |
if {$prg eq ""} { set prg [info nameofexec] } |
if {$prg eq ""} { set prg testfixture } |
if {[file tail $prg]==$prg} { set prg [file join . $prg] } |
set chan [open "|$prg tf_main.tcl" r+] |
fconfigure $chan -buffering line |
set rc [catch { |
testfixture $chan "sqlite3_test_control_pending_byte $::sqlite_pending_byte" |
}] |
if {$rc} { |
testfixture $chan "set ::sqlite_pending_byte $::sqlite_pending_byte" |
} |
return $chan |
} |
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# Execute a command in a child testfixture process, connected by two-way |
# channel $chan. Return the result of the command, or an error message. |
# |
proc testfixture {chan cmd} { |
puts $chan $cmd |
puts $chan OVER |
set r "" |
while { 1 } { |
set line [gets $chan] |
if { $line == "OVER" } { |
set res [lindex $r 1] |
if { [lindex $r 0] } { error $res } |
return $res |
} |
if {[eof $chan]} { |
return "ERROR: Child process hung up" |
} |
append r $line |
} |
} |
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proc testfixture_nb_cb {varname chan} { |
if {[eof $chan]} { |
append ::tfnb($chan) "ERROR: Child process hung up" |
set line "OVER" |
} else { |
set line [gets $chan] |
} |
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if { $line == "OVER" } { |
set $varname [lindex $::tfnb($chan) 1] |
unset ::tfnb($chan) |
close $chan |
} else { |
append ::tfnb($chan) $line |
} |
} |
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proc testfixture_nb {varname cmd} { |
set chan [launch_testfixture] |
set ::tfnb($chan) "" |
fconfigure $chan -blocking 0 -buffering none |
puts $chan $cmd |
puts $chan OVER |
fileevent $chan readable [list testfixture_nb_cb $varname $chan] |
return "" |
} |
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# Write the main loop for the child testfixture processes into file |
# tf_main.tcl. The parent (this script) interacts with the child processes |
# via a two way pipe. The parent writes a script to the stdin of the child |
# process, followed by the word "OVER" on a line of its own. The child |
# process evaluates the script and writes the results to stdout, followed |
# by an "OVER" of its own. |
# |
set main_loop_written 0 |
proc write_main_loop {} { |
if {$::main_loop_written} return |
set wrapper "" |
if {[sqlite3 -has-codec] && [info exists ::do_not_use_codec]==0} { |
set wrapper " |
rename sqlite3 sqlite_orig |
proc sqlite3 {args} {[info body sqlite3]} |
" |
} |
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set fd [open tf_main.tcl w] |
puts $fd [string map [list %WRAPPER% $wrapper] { |
%WRAPPER% |
set script "" |
while {![eof stdin]} { |
flush stdout |
set line [gets stdin] |
if { $line == "OVER" } { |
set rc [catch {eval $script} result] |
puts [list $rc $result] |
puts OVER |
flush stdout |
set script "" |
} else { |
append script $line |
append script "\n" |
} |
} |
}] |
close $fd |
set main_loop_written 1 |
} |
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