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merge r3294, r3305: Fix a bug introduced in r2032: After a child process has read a terminate message from a channel, the process tries to read the channel again. The kernel (at least FreeBSD) may preempt the process and sends a SIGIO signal to a master process. The master process sends a new terminate message, the kernel switches again to the the child process, and the child process reads the messages instead of an EAGAIN error. And this may repeat over and over. Being that the child process can not exit the cycle and test the termination flag set by the message handler. The fix disallow the master process to send a new terminate message on SIGIO signal reception. It may send the message only on SIGALARM signal.
author Igor Sysoev <igor@sysoev.ru>
date Mon, 01 Feb 2010 15:49:36 +0000
parents 458b6c3fea65
children
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# Copyright (C) Igor Sysoev


case $USE_THREADS in
    rfork)
        have=NGX_THREADS . auto/have
        have=NGX_USE_RFORK . auto/have
        CORE_DEPS="$CORE_DEPS $FREEBSD_RFORK_DEPS"
        CORE_SRCS="$CORE_SRCS $FREEBSD_RFORK_SRCS"

        case "$NGX_PLATFORM" in
            *:i386)
                if [ \( $version -gt 500000 -a $version -lt 501000 \) \
                     -o $version -lt 491000 ]
                then
                    CORE_SRCS="$CORE_SRCS $FREEBSD_RFORK_THREAD_SRCS"
                fi
            ;;
        esac
    ;;

    pthreads)
        have=NGX_THREADS . auto/have
        CORE_SRCS="$CORE_SRCS $PTHREAD_SRCS"
        CORE_LIBS="$CORE_LIBS -lpthread"
    ;;

    libthr)
        have=NGX_THREADS . auto/have
        CORE_SRCS="$CORE_SRCS $PTHREAD_SRCS"
        CORE_LIBS="$CORE_LIBS -lthr"
    ;;

    linuxthreads)
        have=NGX_THREADS . auto/have
        have=NGX_LINUXTHREADS . auto/have
        CFLAGS="$CFLAGS -D_THREAD_SAFE"
        CFLAGS="$CFLAGS -I /usr/local/include/pthread/linuxthreads"
        CORE_SRCS="$CORE_SRCS $PTHREAD_SRCS"
        CORE_LIBS="$CORE_LIBS -L /usr/local/lib -llthread -llgcc_r"
    ;;

    libc_r)
        case "$NGX_PLATFORM" in
            FreeBSD:[34]*)
                have=NGX_THREADS . auto/have
                CFLAGS="$CFLAGS -pthread"
                CORE_SRCS="$CORE_SRCS $PTHREAD_SRCS"
                CORE_LIBS="$CORE_LIBS -pthread"
            ;;

            FreeBSD:[56]*)
                have=NGX_THREADS . auto/have
                CORE_SRCS="$CORE_SRCS $PTHREAD_SRCS"
                CORE_LIBS="$CORE_LIBS -lc_r"
            ;;
        esac
    ;;

    NO)
    ;;

    *)
        have=NGX_THREADS . auto/have
        CORE_SRCS="$CORE_SRCS $PTHREAD_SRCS"
        CORE_LIBS="$CORE_LIBS -l$USE_THREADS"
    ;;

esac