Annotation of embedaddon/sqlite3/test/lock_common.tcl, revision 1.1
1.1 ! misho 1: # 2010 April 14
! 2: #
! 3: # The author disclaims copyright to this source code. In place of
! 4: # a legal notice, here is a blessing:
! 5: #
! 6: # May you do good and not evil.
! 7: # May you find forgiveness for yourself and forgive others.
! 8: # May you share freely, never taking more than you give.
! 9: #
! 10: #***********************************************************************
! 11: # This file contains code used by several different test scripts. The
! 12: # code in this file allows testfixture to control another process (or
! 13: # processes) to test locking.
! 14: #
! 15:
! 16: proc do_multiclient_test {varname script} {
! 17:
! 18: foreach code [list {
! 19: if {[info exists ::G(valgrind)]} { db close ; continue }
! 20: set ::code2_chan [launch_testfixture]
! 21: set ::code3_chan [launch_testfixture]
! 22: proc code2 {tcl} { testfixture $::code2_chan $tcl }
! 23: proc code3 {tcl} { testfixture $::code3_chan $tcl }
! 24: set tn 1
! 25: } {
! 26: proc code2 {tcl} { uplevel #0 $tcl }
! 27: proc code3 {tcl} { uplevel #0 $tcl }
! 28: set tn 2
! 29: }] {
! 30: faultsim_delete_and_reopen
! 31:
! 32: proc code1 {tcl} { uplevel #0 $tcl }
! 33:
! 34: # Open connections [db2] and [db3]. Depending on which iteration this
! 35: # is, the connections may be created in this interpreter, or in
! 36: # interpreters running in other OS processes. As such, the [db2] and [db3]
! 37: # commands should only be accessed within [code2] and [code3] blocks,
! 38: # respectively.
! 39: #
! 40: eval $code
! 41: code2 { sqlite3 db2 test.db }
! 42: code3 { sqlite3 db3 test.db }
! 43:
! 44: # Shorthand commands. Execute SQL using database connection [db2] or
! 45: # [db3]. Return the results.
! 46: #
! 47: proc sql1 {sql} { db eval $sql }
! 48: proc sql2 {sql} { code2 [list db2 eval $sql] }
! 49: proc sql3 {sql} { code3 [list db3 eval $sql] }
! 50:
! 51: proc csql1 {sql} { list [catch { sql1 $sql } msg] $msg }
! 52: proc csql2 {sql} { list [catch { sql2 $sql } msg] $msg }
! 53: proc csql3 {sql} { list [catch { sql3 $sql } msg] $msg }
! 54:
! 55: uplevel set $varname $tn
! 56: uplevel $script
! 57:
! 58: catch { code2 { db2 close } }
! 59: catch { code3 { db3 close } }
! 60: catch { close $::code2_chan }
! 61: catch { close $::code3_chan }
! 62: catch { db close }
! 63: }
! 64: }
! 65:
! 66: # Launch another testfixture process to be controlled by this one. A
! 67: # channel name is returned that may be passed as the first argument to proc
! 68: # 'testfixture' to execute a command. The child testfixture process is shut
! 69: # down by closing the channel.
! 70: proc launch_testfixture {{prg ""}} {
! 71: write_main_loop
! 72: if {$prg eq ""} { set prg [info nameofexec] }
! 73: if {$prg eq ""} { set prg testfixture }
! 74: if {[file tail $prg]==$prg} { set prg [file join . $prg] }
! 75: set chan [open "|$prg tf_main.tcl" r+]
! 76: fconfigure $chan -buffering line
! 77: set rc [catch {
! 78: testfixture $chan "sqlite3_test_control_pending_byte $::sqlite_pending_byte"
! 79: }]
! 80: if {$rc} {
! 81: testfixture $chan "set ::sqlite_pending_byte $::sqlite_pending_byte"
! 82: }
! 83: return $chan
! 84: }
! 85:
! 86: # Execute a command in a child testfixture process, connected by two-way
! 87: # channel $chan. Return the result of the command, or an error message.
! 88: #
! 89: proc testfixture {chan cmd} {
! 90: puts $chan $cmd
! 91: puts $chan OVER
! 92: set r ""
! 93: while { 1 } {
! 94: set line [gets $chan]
! 95: if { $line == "OVER" } {
! 96: set res [lindex $r 1]
! 97: if { [lindex $r 0] } { error $res }
! 98: return $res
! 99: }
! 100: if {[eof $chan]} {
! 101: return "ERROR: Child process hung up"
! 102: }
! 103: append r $line
! 104: }
! 105: }
! 106:
! 107: proc testfixture_nb_cb {varname chan} {
! 108: if {[eof $chan]} {
! 109: append ::tfnb($chan) "ERROR: Child process hung up"
! 110: set line "OVER"
! 111: } else {
! 112: set line [gets $chan]
! 113: }
! 114:
! 115: if { $line == "OVER" } {
! 116: set $varname [lindex $::tfnb($chan) 1]
! 117: unset ::tfnb($chan)
! 118: close $chan
! 119: } else {
! 120: append ::tfnb($chan) $line
! 121: }
! 122: }
! 123:
! 124: proc testfixture_nb {varname cmd} {
! 125: set chan [launch_testfixture]
! 126: set ::tfnb($chan) ""
! 127: fconfigure $chan -blocking 0 -buffering none
! 128: puts $chan $cmd
! 129: puts $chan OVER
! 130: fileevent $chan readable [list testfixture_nb_cb $varname $chan]
! 131: return ""
! 132: }
! 133:
! 134: # Write the main loop for the child testfixture processes into file
! 135: # tf_main.tcl. The parent (this script) interacts with the child processes
! 136: # via a two way pipe. The parent writes a script to the stdin of the child
! 137: # process, followed by the word "OVER" on a line of its own. The child
! 138: # process evaluates the script and writes the results to stdout, followed
! 139: # by an "OVER" of its own.
! 140: #
! 141: set main_loop_written 0
! 142: proc write_main_loop {} {
! 143: if {$::main_loop_written} return
! 144: set wrapper ""
! 145: if {[sqlite3 -has-codec] && [info exists ::do_not_use_codec]==0} {
! 146: set wrapper "
! 147: rename sqlite3 sqlite_orig
! 148: proc sqlite3 {args} {[info body sqlite3]}
! 149: "
! 150: }
! 151:
! 152: set fd [open tf_main.tcl w]
! 153: puts $fd [string map [list %WRAPPER% $wrapper] {
! 154: %WRAPPER%
! 155: set script ""
! 156: while {![eof stdin]} {
! 157: flush stdout
! 158: set line [gets stdin]
! 159: if { $line == "OVER" } {
! 160: set rc [catch {eval $script} result]
! 161: puts [list $rc $result]
! 162: puts OVER
! 163: flush stdout
! 164: set script ""
! 165: } else {
! 166: append script $line
! 167: append script "\n"
! 168: }
! 169: }
! 170: }]
! 171: close $fd
! 172: set main_loop_written 1
! 173: }
! 174:
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