Naram Qashat wrote:
Bill Hoffman wrote:
Naram Qashat wrote:
I have a CMake project that I have been testing with various verisons
of CMake 2.4.x and 2.6.x to make sure it works as far back as 2.4.0,
due to not knowing what version of CMake our users will be using
since a lot of them use shells. In some instances, I have to read
lines from a file using a specific regular expression. With CMake
2.6.x, this works fine using the file(STRINGS) command. With CMake
2.4.x, though (I haven't checked what versions specifically), after
reading in a lot of files, I notice that a "memory exhausted" error
comes up. I'm wondering when CMake cleans up the memory it uses, and
if there is a way around this problem. I would prefer not to force
our uses to use CMake 2.6.x if their shell provider won't provide
them something newer.
There may have been leaks in 2.4.X, not really much we can do about
that now.... What does the your cmake code look like that causes the
leak?
-Bill
I believe it is within this macro of mine:
macro(read_from_file FILE REGEX STRINGS)
if(CMAKE26_OR_BETTER)
# For CMake 2.6.x or better, we can just use the STRINGS sub-command
to get the lines that match the given regular expression (if one is
given, otherwise get all lines)
if(REGEX STREQUAL "")
file(STRINGS ${FILE} RESULT)
else(REGEX STREQUAL "")
file(STRINGS ${FILE} RESULT REGEX ${REGEX})
endif(REGEX STREQUAL "")
else(CMAKE26_OR_BETTER)
# For CMake 2.4.x, we need to do this manually, firstly we read the
file in
file(READ ${FILE} ALL_STRINGS)
# Next we replace all newlines with semicolons
string(REGEX REPLACE "\n" ";" ALL_STRINGS ${ALL_STRINGS})
if(REGEX STREQUAL "")
# For no regular expression, just set the result to all the lines
set(RESULT ${ALL_STRINGS})
else(REGEX STREQUAL "")
# Clear the result list
set(RESULT)
# Iterate through all the lines of the file
foreach(STRING ${ALL_STRINGS})
# Check for a match against the given regular expression
string(REGEX MATCH ${REGEX} STRING_MATCH ${STRING})
# If we had a match, append the match to the list
if(STRING_MATCH)
append_to_list(RESULT ${STRING})
endif(STRING_MATCH)
endforeach(STRING)
endif(REGEX STREQUAL "")
endif(CMAKE26_OR_BETTER)
# Set the given STRINGS variable to the result
set(${STRINGS} ${RESULT})
endmacro(read_from_file)
I had done this so I could call the macro and have it work with either
2.6.x or 2.4.x.
The only thing I can think of is to call a new cmake process in the loop
that does the string match, that way the leak will be contained in that
process.
execute_process(COMMAND ${CMAKE_COMMAND} -DFILE="${FILE}"-P
myscript.cmake OUTPUT_VARIABLE OUT)
myscript.cmake
file(READ ${FILE} ALL_STRINGS)
...
message(${RESULT})
-Bill
_______________________________________________
Powered by www.kitware.com
Visit other Kitware open-source projects at
http://www.kitware.com/opensource/opensource.html
Please keep messages on-topic and check the CMake FAQ at:
http://www.cmake.org/Wiki/CMake_FAQ
Follow this link to subscribe/unsubscribe:
http://www.cmake.org/mailman/listinfo/cmake
