Annotation of embedaddon/sqlite3/test/lock_common.tcl, revision 1.1.1.1
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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