Mercurial > cpython-lru_cache-weakref

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Add use_weakref option to functools.lru_cache The use_weakref option makes lru_cache create weak references to the function arguments when creating the cache key, which prevents them from staying in the memory forever even after all other references to them are gone. This is a proof of concept for http://bugs.python.org/issue19859
author Radomir Dopieralski <devel@sheep.art.pl>
date Tue, 03 Dec 2013 16:02:48 +0100
parents 57f630a9de26
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/bin/sh
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2 #
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3 # ===========================================================================
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4 # FILE: makexp_aix
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5 # TYPE: standalone executable
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6 # SYSTEM: AIX 3.2.5 and AIX 4
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7 #
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8 # DESCRIPTION: This script creates an export list of ALL global symbols
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9 # from a list of object or archive files.
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10 #
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11 # USAGE: makexp_aix <OutputFile> "<FirstLine>" <InputFile> ...
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12 #
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13 # where:
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14 # <OutputFile> is the target export list filename.
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15 # <FirstLine> is the path/file string to be appended
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16 # after the "#!" symbols in the first line of the
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17 # export file. Passing "" means deferred resolution.
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18 # <InputFile> is an object (.o) or an archive file (.a).
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19 #
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20 # HISTORY:
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21 # 3-Apr-1998 -- remove C++ entries of the form Class::method
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22 # Vladimir Marangozov
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23 #
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24 # 1-Jul-1996 -- added header information
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25 # Vladimir Marangozov
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26 #
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27 # 28-Jun-1996 -- initial code
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28 # Vladimir Marangozov (Vladimir.Marangozov@imag.fr)
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29 # ==========================================================================
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30
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31 # Variables
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32 expFileName=$1
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33 toAppendStr=$2
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34 shift; shift;
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35 inputFiles=$*
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36 automsg="Generated automatically by makexp_aix"
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37 notemsg="NOTE: lists _all_ global symbols defined in the above file(s)."
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38 curwdir=`pwd`
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39
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40 # Create the export file and setup the header info
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41 echo "#!"$toAppendStr > $expFileName
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42 echo "*" >> $expFileName
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43 echo "* $automsg (`date -u`)" >> $expFileName
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44 echo "*" >> $expFileName
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45 echo "* Base Directory: $curwdir" >> $expFileName
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46 echo "* Input File(s) : $inputFiles" >> $expFileName
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47 echo "*" >> $expFileName
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48 echo "* $notemsg" >> $expFileName
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49 echo "*" >> $expFileName
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50
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51 # Extract the symbol list using 'nm' which produces quite
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52 # different output under AIX 4 than under AIX 3.2.5.
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53 # The following handles both versions by using a common flagset.
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54 # Here are some hidden tricks:
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55 # 1. Use /usr/ccs/bin/nm. Relevant to AIX 3.2.5 which has
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56 # another version under /usr/ucb/bin/nm.
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57 # 2. Use the -B flag to have a standard BSD representation
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58 # of the symbol list on both AIX 3.2.5 and AIX 4. The "-B"
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59 # flag is missing in the AIX 3.2.5 online usage help of 'nm'.
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60 # 3. Use the -x flag to have a hex representation of the symbol
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61 # values. This fills the leading whitespaces on AIX 4,
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62 # thus simplifying the sed statement.
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63 # 4. Eliminate all entries except those with either "B", "D"
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64 # or "T" key letters. We are interested only in the global
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65 # (extern) BSS, DATA and TEXT symbols. With the same statement
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66 # we eliminate object member lines relevant to AIX 4.
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67 # 5. Eliminate entries containing a dot. We can have a dot only
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68 # as a symbol prefix, but such symbols are undefined externs.
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69 # 6. Eliminate everything including the key letter, so that we're
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70 # left with just the symbol name.
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71 # 7. Eliminate all entries containing two colons, like Class::method
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72 #
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73
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74 # Use -X32_64 if it appears to be implemented in this version of 'nm'.
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75 NM=/usr/ccs/bin/nm
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76 xopt=-X32_64
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77 $NM -e $xopt $1 >/dev/null 2>&1 || xopt=""
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78
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79 $NM -Bex $xopt $inputFiles \
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80 | sed -e '/ [^BDT] /d' -e '/\./d' -e 's/.* [BDT] //' -e '/::/d' \
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81 | sort | uniq >> $expFileName