view auto/cc/msvc @ 8805:96ae8e57b3dd

Avoid sending "Connection: keep-alive" when shutting down. When a worker process is shutting down, keepalive is not used: this is checked before the ngx_http_set_keepalive() call in ngx_http_finalize_connection(). Yet the "Connection: keep-alive" header was still sent, even if we know that the worker process is shutting down, potentially resulting in additional requests being sent to the connection which is going to be closed anyway. While clients are expected to be able to handle asynchronous close events (see ticket #1022), it is certainly possible to send the "Connection: close" header instead, informing the client that the connection is going to be closed and potentially saving some unneeded work. With this change, we additionally check for worker process shutdown just before sending response headers, and disable keepalive accordingly.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 11 Jan 2022 02:23:49 +0300
parents 955c4b186354
children 17b3efb45b17
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# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


# MSVC 6.0 SP2                            cl 12.00
# MSVC Toolkit 2003 (7.1)                 cl 13.10
# MSVC 2005 Express Edition SP1 (8.0)     cl 14.00
# MSVC 2008 Express Edition (9.0)         cl 15.00
# MSVC 2010 (10.0)                        cl 16.00
# MSVC 2015 (14.0)                        cl 19.00


NGX_MSVC_VER=`$NGX_WINE $CC 2>&1 | grep 'Compiler Version' 2>&1 \
                                 | sed -e 's/^.* Version \(.*\)/\1/'`

echo " + cl version: $NGX_MSVC_VER"

have=NGX_COMPILER value="\"cl $NGX_MSVC_VER\"" . auto/define


ngx_msvc_ver=`echo $NGX_MSVC_VER | sed -e 's/^\([0-9]*\).*/\1/'`


# optimizations

# maximize speed, equivalent to -Og -Oi -Ot -Oy -Ob2 -Gs -GF -Gy
CFLAGS="$CFLAGS -O2"

# enable global optimization
#CFLAGS="$CFLAGS -Og"
# enable intrinsic functions
#CFLAGS="$CFLAGS -Oi"

# disable inline expansion
#CFLAGS="$CFLAGS -Ob0"
# explicit inline expansion
#CFLAGS="$CFLAGS -Ob1"
# explicit and implicit inline expansion
#CFLAGS="$CFLAGS -Ob2"

# enable frame pointer omission
#CFLAGS="$CFLAGS -Oy"
# disable stack checking calls
#CFLAGS="$CFLAGS -Gs"

# pools strings as read/write
#CFLAGS="$CFLAGS -Gf"
# pools strings as read-only
#CFLAGS="$CFLAGS -GF"


case $CPU in
    pentium)
        # optimize for Pentium and Athlon
        CPU_OPT="-G5"
    ;;

    pentiumpro)
        # optimize for Pentium Pro, Pentium II and Pentium III
        CPU_OPT="-G6"
    ;;

    pentium4)
        # optimize for Pentium 4, MSVC 7
        CPU_OPT="-G7"
    ;;
esac

# __cdecl, default, must be used with OpenSSL, md5 asm, and sha1 asm
#CPU_OPT="$CPU_OPT -Gd"
# __stdcall
#CPU_OPT="$CPU_OPT -Gz"
# __fastcall
#CPU_OPT="$CPU_OPT -Gr"


CFLAGS="$CFLAGS $CPU_OPT"


# warnings

CFLAGS="$CFLAGS -W4"

# stop on warning
CFLAGS="$CFLAGS -WX"

# disable logo
CFLAGS="$CFLAGS -nologo"

# the link flags
CORE_LINK="$CORE_LINK -link -verbose:lib"

# link with libcmt.lib, multithreaded
LIBC="-MT"
# link with msvcrt.dll
# however, MSVC Toolkit 2003 has no MSVCRT.LIB
#LIBC="-MD"

CFLAGS="$CFLAGS $LIBC"

CORE_LIBS="$CORE_LIBS kernel32.lib user32.lib"

# Win32 GUI mode application
#CORE_LINK="$CORE_LINK -subsystem:windows -entry:mainCRTStartup"

# debug
# msvc under Wine issues
# C1902: Program database manager mismatch; please check your installation
if [ -z "$NGX_WINE" ]; then
   CFLAGS="$CFLAGS -Zi -Fd$NGX_OBJS/nginx.pdb"
   CORE_LINK="$CORE_LINK -debug"
fi


# MSVC 2005 supports C99 variadic macros
if [ "$ngx_msvc_ver" -ge 14 ]; then
    have=NGX_HAVE_C99_VARIADIC_MACROS . auto/have
fi


# precompiled headers
CORE_DEPS="$CORE_DEPS $NGX_OBJS/ngx_config.pch"
CORE_LINK="$CORE_LINK $NGX_OBJS/ngx_pch.obj"
NGX_PCH="$NGX_OBJS/ngx_config.pch"
NGX_BUILD_PCH="-Ycngx_config.h -Fp$NGX_OBJS/ngx_config.pch"
NGX_USE_PCH="-Yungx_config.h -Fp$NGX_OBJS/ngx_config.pch"


# the resource file
NGX_RES="$NGX_OBJS/nginx.res"
NGX_RCC="rc -fo$NGX_RES \$(CORE_INCS) $NGX_WIN32_RC"
CORE_LINK="$NGX_RES $CORE_LINK"


# dynamic modules
#MAIN_LINK="-link -def:$NGX_OBJS/nginx.def"
#MODULE_LINK="-LD $NGX_OBJS/nginx.lib"


ngx_pic_opt=
ngx_objout="-Fo"
ngx_binout="-Fe"
ngx_objext="obj"

ngx_long_start='@<<
	'
ngx_long_end='<<'
ngx_long_regex_cont=' \
	'
ngx_long_cont='
	'

# MSVC understand / in path
#ngx_regex_dirsep='\\'
#ngx_dirsep="\\"