view tests/0003/run-test.sh @ 400:8c7453fb5bd9 api-inversion

Invert audioDB::power_flag / audiodb_power()

Here the exciting discovery is that the mmap(), memcpy(), munmap()
sequence is in fact not safe.  In principle an msync() call should be
inserted before unmapping for in-core changes to mmap()ed files to be
flushed to disk.

In this case we work around the problem entirely, by not mmap()ing
anything and doing everything with file descriptors.  Amusingly, that's
probably not desperately safe either, this time because we have to move
the file descriptor position (which is also a shared resource).  dup()
doesn't save us, as the duplicate file descriptor shares a file
position.

This applies also to the filling of data_buffer in the query loop, and
in fact basically any call to lseek(), which is why I'm not fixing it
now.  Solution: if you have multiple threads all acting at once on a
single database, do one audiodb_open() per thread, for now at least.

#! /bin/bash

. ../test-utils.sh

if [ -f testdb ]; then rm -f testdb; fi

${AUDIODB} -d testdb -N

# point query now implemented as sequence search
${AUDIODB} -d testdb -L

# We could contemplate putting the test feature (and the expected
# query output) under svn control if we trust its binary file
# handling.

# FIXME: endianness!
intstring 1 > testfeature
floatstring 1 >> testfeature

${AUDIODB} -d testdb -I -f testfeature

${AUDIODB} -d testdb -Q point -f testfeature > test-query-output

echo testfeature 1 0 0 > test-expected-query-output

cmp test-query-output test-expected-query-output

# failure cases
expect_clean_error_exit ${AUDIODB} -d testdb -I
expect_clean_error_exit ${AUDIODB} -d testdb -f testfeature
expect_clean_error_exit ${AUDIODB} -I -f testfeature
expect_clean_error_exit ${AUDIODB} -d testdb -Q notpoint -f testfeature
expect_clean_error_exit ${AUDIODB} -Q point -f testfeature

exit 104