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#!/usr/bin/env bash
#
# Copyright by The HDF Group.
# All rights reserved.
#
# This file is part of HDF5.  The full HDF5 copyright notice, including
# terms governing use, modification, and redistribution, is contained in
# the COPYING file, which can be found at the root of the source code
# distribution tree, or in https://www.hdfgroup.org/licenses.
# If you do not have access to either file, you may request a copy from
# help@hdfgroup.org.
#
# Acceptance tests for the SWMR feature
#
###############################################################################

utils_testdir=@abs_top_builddir@/@H5_UTILS_TEST_BUILDDIR@
testdir=@abs_top_builddir@/@H5_TEST_BUILDDIR@

###############################################################################
## test parameters
###############################################################################

Nreaders=5              # number of readers to launch
Nrdrs_spa=3             # number of sparse readers to launch
Nrecords=200000         # number of records to write
Nrecs_rem=40000         # number of times to shrink
Nrecs_spa=20000         # number of records to write in the sparse test
Nsecs_add=5             # number of seconds per read interval
Nsecs_rem=3             # number of seconds per read interval
Nsecs_addrem=8          # number of seconds per read interval
nerrors=0

###############################################################################
## definitions for message file to coordinate test runs
###############################################################################
WRITER_MESSAGE=SWMR_WRITER_MESSAGE      # The message file created by writer that the open is complete
                                        # This should be the same as the define in "test/swmr_common.h"
MESSAGE_TIMEOUT=300                     # Message timeout length in secs
                                        # This should be the same as the define in "test/h5test.h"

###############################################################################
## Aliases and function definitions
###############################################################################
DPRINT=:                # Set to "echo Debug:" for debugging printing,
                        # else ":" for noop.
IFDEBUG=:               # Set to null to turn on debugging, else ":" for noop.

# Print a line-line message left justified in a field of 70 characters
# beginning with the word "Testing".
#
TESTING() {
   SPACES="                                                               "
   echo "Testing $* $SPACES" | cut -c1-70 | tr -d '\012'
}

# To wait for the writer message file or till the maximum # of seconds is reached
# $1 is the message file to wait for
# This performs similar function as the routine h5_wait_message() in test/h5test.c
WAIT_MESSAGE() {
    message=$1                                  # Get the name of the message file to wait for
    t0=`date +%s`                               # Get current time in seconds
    difft=0                                     # Initialize the time difference
    mexist=0                                    # Indicate whether the message file is found
    while [ $difft -lt $MESSAGE_TIMEOUT ] ;     # Loop till message times out
    do
        t1=`date +%s`                           # Get current time in seconds
        difft=`expr $t1 - $t0`                  # Calculate the time difference
        if [ -e $message ]; then                # If message file is found:
            mexist=1                            #       indicate the message file is found
            rm $message                         #       remove the message file
            break                               #       get out of the while loop
        fi
    done;
    if test $mexist -eq 0; then
        # Issue warning that the writer message file is not found, continue with launching the reader(s)
        echo warning: $WRITER_MESSAGE is not found after waiting $MESSAGE_TIMEOUT seconds
    else
        echo $WRITER_MESSAGE is found
    fi
}

###############################################################################
## Main
##
## Modifications:
##   Vailin Choi; July 2013
##     Add waiting of message file before launching the reader(s).
##     Due to the implementation of file locking, coordination
##     is needed in file opening for the writer/reader tests
##     to proceed as expected.
##
###############################################################################

# Check to see if the VFD specified by the HDF5_DRIVER environment variable
# supports SWMR.
$utils_testdir/swmr_check_compat_vfd
rc=$?
if [ $rc -ne 0 ] ; then
    echo
    echo "The VFD specified by the HDF5_DRIVER environment variable"
    echo "does not support SWMR."
    echo
    echo "SWMR acceptance tests skipped"
    echo
    exit 0
fi

# Parse options (none accepted at this time)
while [ $# -gt 0 ]; do
    case "$1" in
    *)  # unknown option
        echo "$0: Unknown option ($1)"
        exit 1
        ;;
    esac
done

# HDF5 has several tests that create and delete signal files to communicate
# between processes, and it seems that even though the names of the files are
# different, occasionally the wrong file is deleted, interrupting the flow of
# the test.  Running each of these tests in its own directory should eliminate
# the problem.
mkdir swmr_test
for FILE in swmr*; do
    case "$FILE" in
        *.o) continue ;;    ## don't copy the .o files
    esac
    if test -f "$FILE" ; then
        cp $FILE swmr_test
    fi
done

# With the --disable-shared option, swmr program files are built in the test
# directory, otherwise they are in test/.libs with a corresponding wrapper
# script in the test directory.  The programs or wrapper scripts in test should
# always be copied, swmr files in .libs should be copied only if they exists.
if [ -f .libs/swmr ]; then
    mkdir swmr_test/.libs
    for FILE in .libs/swmr*; do
        case "$FILE" in
            *.o) continue ;;    ## don't copy the .o files
        esac
        if test -f "$FILE" ; then
            cp $FILE swmr_test/.libs
        fi
    done
fi

cd swmr_test


# Loop over index types
for index_type in "-i ea" "-i b2"
do
    # Try with and without compression
    for compress in "" "-c 5"
    do
        echo
        echo "*******************************************************************************"
        echo "** Loop testing parameters: $index_type $compress"
        echo "*******************************************************************************"
        echo
        echo
        echo "###############################################################################"
        echo "## Generator test"
        echo "###############################################################################"
        # Launch the Generator without SWMR_WRITE
        echo launch the swmr_generator
        $testdir/swmr_generator -q $compress $index_type
        if test $? -ne 0; then
            echo generator had error
            nerrors=`expr $nerrors + 1`
        fi

        # Launch the Generator with SWMR_WRITE
        echo launch the swmr_generator with SWMR_WRITE
        $testdir/swmr_generator -q -s $compress $index_type
        if test $? -ne 0; then
            echo generator had error
            nerrors=`expr $nerrors + 1`
        fi

        # Check for error and exit if one occurred
        $DPRINT nerrors=$nerrors
        if test $nerrors -ne 0 ; then
            echo "SWMR tests failed with $nerrors errors."
            exit 1
        fi

        echo
        echo "###############################################################################"
        echo "## Use H5Fstart_swmr_write() to enable SWMR writing mode"
        echo "###############################################################################"

        # Remove any possible writer message file before launching writer
        rm -f $WRITER_MESSAGE
        #
        # Launch the Writer
        echo launch the swmr_start_writer
        seed="" # Put -r <random seed> command here
        $testdir/swmr_start_write -q $compress $index_type $Nrecords $seed 2>&1 |tee swmr_writer.out &
        pid_writer=$!
        $DPRINT pid_writer=$pid_writer

        # Wait for message from writer process before starting reader(s)
        WAIT_MESSAGE $WRITER_MESSAGE

        # Launch the Readers
        #declare -a seeds=(<seed1> <seed2> <seed3> ... )
        echo launch $Nreaders swmr_readers
        pid_readers=""
        n=0
        while [ $n -lt $Nreaders ]; do
            #seed="-r ${seeds[$n]}"
            seed=""
            $testdir/swmr_reader -q $Nsecs_add $seed 2>&1 |tee swmr_reader.out.$n &
            pid_readers="$pid_readers $!"
            n=`expr $n + 1`
        done
        $DPRINT pid_readers=$pid_readers
        $IFDEBUG ps

        # Collect exit codes of the readers first because they usually finish
        # before the writer.
        for xpid in $pid_readers; do
            $DPRINT checked reader $xpid
            wait $xpid
            if test $? -ne 0; then
                echo reader had error
                nerrors=`expr $nerrors + 1`
            fi
        done

        # Collect exit code of the writer
        $DPRINT checked writer $pid_writer
        wait $pid_writer
        if test $? -ne 0; then
            echo writer had error
            nerrors=`expr $nerrors + 1`
        fi

        # Check for error and exit if one occurred
        $DPRINT nerrors=$nerrors
        if test $nerrors -ne 0 ; then
            echo "SWMR tests failed with $nerrors errors."
            echo "(Writer and reader output preserved)"
            exit 1
        fi

        # Clean up output files
        rm -f swmr_writer.out
        rm -f swmr_reader.out.*

        echo
        echo "###############################################################################"
        echo "## Writer test - test expanding the dataset"
        echo "###############################################################################"

        # Launch the Generator
        echo launch the swmr_generator
        $testdir/swmr_generator -q -s $compress $index_type
        if test $? -ne 0; then
            echo generator had error
            nerrors=`expr $nerrors + 1`
        fi

        # Remove any possible writer message file before launching writer
        rm -f $WRITER_MESSAGE
        #
        # Launch the Writer
        echo launch the swmr_writer
        seed="" # Put -r <random seed> command here
        $testdir/swmr_writer -q -o $Nrecords $seed 2>&1 |tee swmr_writer.out &
        pid_writer=$!
        $DPRINT pid_writer=$pid_writer

        # Wait for message from writer process before starting reader(s)
        WAIT_MESSAGE $WRITER_MESSAGE

        # Launch the Readers
        #declare -a seeds=(<seed1> <seed2> <seed3> ... )
        echo launch $Nreaders swmr_readers
        pid_readers=""
        n=0
        while [ $n -lt $Nreaders ]; do
            #seed="-r ${seeds[$n]}"
            seed=""
            $testdir/swmr_reader -q $Nsecs_add $seed 2>&1 |tee swmr_reader.out.$n &
            pid_readers="$pid_readers $!"
            n=`expr $n + 1`
        done
        $DPRINT pid_readers=$pid_readers
        $IFDEBUG ps

        # Collect exit code of the readers first because they usually finish
        # before the writer.
        for xpid in $pid_readers; do
            $DPRINT checked reader $xpid
            wait $xpid
            if test $? -ne 0; then
                echo reader had error
                nerrors=`expr $nerrors + 1`
            fi
        done

        # Collect exit code of the writer
        $DPRINT checked writer $pid_writer
        wait $pid_writer
        if test $? -ne 0; then
            echo writer had error
            nerrors=`expr $nerrors + 1`
        fi

        # Check for error and exit if one occurred
        $DPRINT nerrors=$nerrors
        if test $nerrors -ne 0 ; then
            echo "SWMR tests failed with $nerrors errors."
            echo "(Writer and reader output preserved)"
            exit 1
        fi

        # Clean up output files
        rm -f swmr_writer.out
        rm -f swmr_reader.out.*

        echo
        echo "###############################################################################"
        echo "## Remove test - test shrinking the dataset"
        echo "###############################################################################"

        # Remove any possible writer message file before launching writer
        rm -f $WRITER_MESSAGE
        # Launch the Remove Writer
        echo launch the swmr_remove_writer
        seed="" # Put -r <random seed> command here
        $testdir/swmr_remove_writer -q -o $Nrecs_rem $seed 2>&1 |tee swmr_writer.out &
        pid_writer=$!
        $DPRINT pid_writer=$pid_writer

        # Wait for message from writer process before starting reader(s)
        WAIT_MESSAGE $WRITER_MESSAGE

        # Launch the Remove Readers
        #declare -a seeds=(<seed1> <seed2> <seed3> ... )
        n=0
        pid_readers=""
        echo launch $Nreaders swmr_remove_readers
        while [ $n -lt $Nreaders ]; do
            #seed="-r ${seeds[$n]}"
            seed=""
            $testdir/swmr_remove_reader -q $Nsecs_rem $seed 2>&1 |tee swmr_reader.out.$n &
            pid_readers="$pid_readers $!"
            n=`expr $n + 1`
        done
        $DPRINT pid_readers=$pid_readers
        $IFDEBUG ps

        # Collect exit code of the readers first because they usually finish
        # before the writer.
        for xpid in $pid_readers; do
            $DPRINT checked reader $xpid
            wait $xpid
            if test $? -ne 0; then
                echo reader had error
                nerrors=`expr $nerrors + 1`
            fi
        done

        # Collect exit code of the writer
        $DPRINT checked writer $pid_writer
        wait $pid_writer
        if test $? -ne 0; then
            echo writer had error
            nerrors=`expr $nerrors + 1`
        fi

        # Check for error and exit if one occurred
        $DPRINT nerrors=$nerrors
        if test $nerrors -ne 0 ; then
            echo "SWMR tests failed with $nerrors errors."
            echo "(Writer and reader output preserved)"
            exit 1
        fi

        # Clean up output files
        rm -f swmr_writer.out
        rm -f swmr_reader.out.*

        echo
        echo "###############################################################################"
        echo "## Add/remove test - randomly grow or shrink the dataset"
        echo "###############################################################################"

        # Launch the Generator
        echo launch the swmr_generator
        $testdir/swmr_generator -q $compress $index_type
        if test $? -ne 0; then
            echo generator had error
            nerrors=`expr $nerrors + 1`
        fi

        # Launch the Writer (not in parallel - just to rebuild the datasets)
        echo launch the swmr_writer
        seed="" # Put -r <random seed> command here
        $testdir/swmr_writer -q $Nrecords $seed
        if test $? -ne 0; then
            echo writer had error
            nerrors=`expr $nerrors + 1`
        fi

        # Remove any possible writer message file before launching writer
        rm -f $WRITER_MESSAGE
        #
        # Launch the Add/Remove Writer
        echo launch the swmr_addrem_writer
        seed="" # Put -r <random seed> command here
        $testdir/swmr_addrem_writer -q $Nrecords $seed 2>&1 |tee swmr_writer.out &
        pid_writer=$!
        $DPRINT pid_writer=$pid_writer

        # Wait for message from writer process before starting reader(s)
        WAIT_MESSAGE $WRITER_MESSAGE
        #
        # Launch the Add/Remove Readers
        #declare -a seeds=(<seed1> <seed2> <seed3> ... )
        n=0
        pid_readers=""
        echo launch $Nreaders swmr_remove_readers
        while [ $n -lt $Nreaders ]; do
            #seed="-r ${seeds[$n]}"
            seed=""
            $testdir/swmr_remove_reader -q $Nsecs_addrem $seed 2>&1 |tee swmr_reader.out.$n &
            pid_readers="$pid_readers $!"
            n=`expr $n + 1`
        done
        $DPRINT pid_readers=$pid_readers
        $IFDEBUG ps

        # Collect exit code of the readers first because they usually finish
        # before the writer.
        for xpid in $pid_readers; do
            $DPRINT checked reader $xpid
            wait $xpid
            if test $? -ne 0; then
                echo reader had error
                nerrors=`expr $nerrors + 1`
            fi
        done

        # Collect exit code of the writer
        $DPRINT checked writer $pid_writer
        wait $pid_writer
        if test $? -ne 0; then
            echo writer had error
            nerrors=`expr $nerrors + 1`
        fi

        # Check for error and exit if one occurred
        $DPRINT nerrors=$nerrors
        if test $nerrors -ne 0 ; then
            echo "SWMR tests failed with $nerrors errors."
            echo "(Writer and reader output preserved)"
            exit 1
        fi

        # Clean up output files
        rm -f swmr_writer.out
        rm -f swmr_reader.out.*

        echo
        echo "###############################################################################"
        echo "## Sparse writer test - test writing to random locations in the dataset"
        echo "###############################################################################"

        # Launch the Generator
        # NOTE: Random seed is shared between readers and writers and is
        #       created by the generator.
        echo launch the swmr_generator
        seed="" # Put -r <random seed> command here
        $testdir/swmr_generator -q $compress $index_type $seed
        if test $? -ne 0; then
            echo generator had error
            nerrors=`expr $nerrors + 1`
        fi

        # Remove any possible writer message file before launching writer
        rm -f $WRITER_MESSAGE
        # Launch the Sparse writer
        echo launch the swmr_sparse_writer
        nice -n 20 $testdir/swmr_sparse_writer -q $Nrecs_spa 2>&1 |tee swmr_writer.out &
        pid_writer=$!
        $DPRINT pid_writer=$pid_writer

        # Wait for message from writer process before starting reader(s)
        WAIT_MESSAGE $WRITER_MESSAGE
        #
        # Launch the Sparse readers
        n=0
        pid_readers=""
        echo launch $Nrdrs_spa swmr_sparse_readers
        while [ $n -lt $Nrdrs_spa ]; do
            # The sparse reader spits out a LOT of data so it's set to 'quiet'
            $testdir/swmr_sparse_reader -q $Nrecs_spa 2>&1 |tee swmr_reader.out.$n &
            pid_readers="$pid_readers $!"
            n=`expr $n + 1`
        done
        $DPRINT pid_readers=$pid_readers
        $IFDEBUG ps

        # Collect exit code of the writer
        $DPRINT checked writer $pid_writer
        wait $pid_writer
        if test $? -ne 0; then
            echo writer had error
            nerrors=`expr $nerrors + 1`
        fi

        # Collect exit code of the readers
        for xpid in $pid_readers; do
            $DPRINT checked reader $xpid
            wait $xpid
            if test $? -ne 0; then
                echo reader had error
                nerrors=`expr $nerrors + 1`
            fi
        done

        # Check for error and exit if one occurred
        $DPRINT nerrors=$nerrors
        if test $nerrors -ne 0 ; then
            echo "SWMR tests failed with $nerrors errors."
            echo "(Writer and reader output preserved)"
            exit 1
        fi

        # Clean up output files
        rm -f swmr_writer.out
        rm -f swmr_reader.out.*
    done
done

###############################################################################
## Report and exit
###############################################################################
cd ..
$DPRINT nerrors=$nerrors
if test $nerrors -eq 0 ; then
    echo "SWMR tests passed."
    if test -z "$HDF5_NOCLEANUP"; then
        # delete the test directory
        rm -rf swmr_test
    fi
    exit 0
else
    echo "SWMR tests failed with $nerrors errors."
    exit 1
fi