occt/tests/bugs/caf/buc60921

# This TCL script demonstrates memory leak in OCAF Undo/Redo
#
# The DRAW command TestOCAF (provided separately) just reads 
# the specified brep file
# and puts it into the document on a given label.
# This operation is done and undone several times,
# and the problem is that each time additional memory
# (approximately equivalent to the size of shape)
# is consumed.
#
# While obviously it should not be so: even if Undo keeps the 
# shape in memory as delta on Redo, this delta should be cleared 
# by the next operation!
#
# The bug persists with any setting of variables MMGT_OPT and MMGT_MMAP
# (while with different initial size and step) and 
#
# It seems that either delta is not completely freed, or some
# other data structures keep the shape memory

puts "==========="
puts "BUC60921"
puts "BUC60954"
puts "==========="

pload QAcommands

# see end of script!
set BREP [locate_data_file BUC60921.brep]
#set BREP [locate_data_file Bottom.brep]

NewDocument D MDTV-Standard
UndoLimit D 100

set i_max 10
set listmem {}
for {set i 1} {$i <= ${i_max}} {incr i} {
    CommitCommand D
    OpenCommand D
    BUC60921 D 0:1:1 $BREP

    CommitCommand D
    OpenCommand D
    Undo D

    # check memory usage (with tolerance equal to half page size)
    lappend listmem [expr [meminfo w] / 1024]
    if { [checktrend $listmem 0 512 "Memory leak detected"] } {
        puts "No memory leak, $i iterations"
        break
    }
}