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"Any two of the parameters, readfds, writefds, or exceptfds, can be
given as null. At least one must be non-null, and any non-null
descriptor set must contain at least one handle to a socket."
http://msdn.microsoft.com/en-ca/library/windows/desktop/ms740141(v=vs.85).aspx
When using select(), cURL doesn't adhere to this (WinSock-specific)
rule, and can ask to monitor empty fd_sets, which leads to select()
returning WSAEINVAL (i.e. EINVAL) and connections failing in mysterious
ways as a result (at least when using the curl_multi_socket_action()
interface).
Bug: http://curl.haxx.se/mail/lib-2014-05/0278.html
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The flag can be used in pycurl-based applications where using the multi
interface would not be acceptable because of the performance lost caused
by implementing the select() loop in python.
Bug: http://curl.haxx.se/bug/view.cgi?id=1168
Downstream Bug: https://bugzilla.redhat.com/919127
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This commit renames lib/setup.h to lib/curl_setup.h and
renames lib/setup_once.h to lib/curl_setup_once.h.
Removes the need and usage of a header inclusion guard foreign
to libcurl. [1]
Removes the need and presence of an alarming notice we carried
in old setup_once.h [2]
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1 - lib/setup_once.h used __SETUP_ONCE_H macro as header inclusion guard
up to commit ec691ca3 which changed this to HEADER_CURL_SETUP_ONCE_H,
this single inclusion guard is enough to ensure that inclusion of
lib/setup_once.h done from lib/setup.h is only done once.
Additionally lib/setup.h has always used __SETUP_ONCE_H macro to
protect inclusion of setup_once.h even after commit ec691ca3, this
was to avoid a circular header inclusion triggered when building a
c-ares enabled version with c-ares sources available which also has
a setup_once.h header. Commit ec691ca3 exposes the real nature of
__SETUP_ONCE_H usage in lib/setup.h, it is a header inclusion guard
foreign to libcurl belonging to c-ares's setup_once.h
The renaming this commit does, fixes the circular header inclusion,
and as such removes the need and usage of a header inclusion guard
foreign to libcurl. Macro __SETUP_ONCE_H no longer used in libcurl.
2 - Due to the circular interdependency of old lib/setup_once.h and the
c-ares setup_once.h header, old file lib/setup_once.h has carried
back from 2006 up to now days an alarming and prominent notice about
the need of keeping libcurl's and c-ares's setup_once.h in sync.
Given that this commit fixes the circular interdependency, the need
and presence of mentioned notice is removed.
All mentioned interdependencies come back from now old days when
the c-ares project lived inside a curl subdirectory. This commit
removes last traces of such fact.
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This reverts renaming and usage of lib/*.h header files done
28-12-2012, reverting 2 commits:
f871de0... build: make use of 76 lib/*.h renamed files
ffd8e12... build: rename 76 lib/*.h files
This also reverts removal of redundant include guard (redundant thanks
to changes in above commits) done 2-12-2013, reverting 1 commit:
c087374... curl_setup.h: remove redundant include guard
This also reverts renaming and usage of lib/*.c source files done
3-12-2013, reverting 3 commits:
13606bb... build: make use of 93 lib/*.c renamed files
5b6e792... build: rename 93 lib/*.c files
7d83dff... build: commit 13606bbfde follow-up 1
Start of related discussion thread:
http://curl.haxx.se/mail/lib-2013-01/0012.html
Asking for confirmation on pushing this revertion commit:
http://curl.haxx.se/mail/lib-2013-01/0048.html
Confirmation summary:
http://curl.haxx.se/mail/lib-2013-01/0079.html
NOTICE: The list of 2 files that have been modified by other
intermixed commits, while renamed, and also by at least one
of the 6 commits this one reverts follows below. These 2 files
will exhibit a hole in history unless git's '--follow' option
is used when viewing logs.
lib/curl_imap.h
lib/curl_smtp.h
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93 lib/*.c source files renamed to use our standard naming scheme.
This commit only does the file renaming.
----------------------------------------
renamed: lib/amigaos.c -> lib/curl_amigaos.c
renamed: lib/asyn-ares.c -> lib/curl_asyn_ares.c
renamed: lib/asyn-thread.c -> lib/curl_asyn_thread.c
renamed: lib/axtls.c -> lib/curl_axtls.c
renamed: lib/base64.c -> lib/curl_base64.c
renamed: lib/bundles.c -> lib/curl_bundles.c
renamed: lib/conncache.c -> lib/curl_conncache.c
renamed: lib/connect.c -> lib/curl_connect.c
renamed: lib/content_encoding.c -> lib/curl_content_encoding.c
renamed: lib/cookie.c -> lib/curl_cookie.c
renamed: lib/cyassl.c -> lib/curl_cyassl.c
renamed: lib/dict.c -> lib/curl_dict.c
renamed: lib/easy.c -> lib/curl_easy.c
renamed: lib/escape.c -> lib/curl_escape.c
renamed: lib/file.c -> lib/curl_file.c
renamed: lib/fileinfo.c -> lib/curl_fileinfo.c
renamed: lib/formdata.c -> lib/curl_formdata.c
renamed: lib/ftp.c -> lib/curl_ftp.c
renamed: lib/ftplistparser.c -> lib/curl_ftplistparser.c
renamed: lib/getenv.c -> lib/curl_getenv.c
renamed: lib/getinfo.c -> lib/curl_getinfo.c
renamed: lib/gopher.c -> lib/curl_gopher.c
renamed: lib/gtls.c -> lib/curl_gtls.c
renamed: lib/hash.c -> lib/curl_hash.c
renamed: lib/hmac.c -> lib/curl_hmac.c
renamed: lib/hostasyn.c -> lib/curl_hostasyn.c
renamed: lib/hostcheck.c -> lib/curl_hostcheck.c
renamed: lib/hostip.c -> lib/curl_hostip.c
renamed: lib/hostip4.c -> lib/curl_hostip4.c
renamed: lib/hostip6.c -> lib/curl_hostip6.c
renamed: lib/hostsyn.c -> lib/curl_hostsyn.c
renamed: lib/http.c -> lib/curl_http.c
renamed: lib/http_chunks.c -> lib/curl_http_chunks.c
renamed: lib/http_digest.c -> lib/curl_http_digest.c
renamed: lib/http_negotiate.c -> lib/curl_http_negotiate.c
renamed: lib/http_negotiate_sspi.c -> lib/curl_http_negotiate_sspi.c
renamed: lib/http_proxy.c -> lib/curl_http_proxy.c
renamed: lib/idn_win32.c -> lib/curl_idn_win32.c
renamed: lib/if2ip.c -> lib/curl_if2ip.c
renamed: lib/imap.c -> lib/curl_imap.c
renamed: lib/inet_ntop.c -> lib/curl_inet_ntop.c
renamed: lib/inet_pton.c -> lib/curl_inet_pton.c
renamed: lib/krb4.c -> lib/curl_krb4.c
renamed: lib/krb5.c -> lib/curl_krb5.c
renamed: lib/ldap.c -> lib/curl_ldap.c
renamed: lib/llist.c -> lib/curl_llist.c
renamed: lib/md4.c -> lib/curl_md4.c
renamed: lib/md5.c -> lib/curl_md5.c
renamed: lib/memdebug.c -> lib/curl_memdebug.c
renamed: lib/mprintf.c -> lib/curl_mprintf.c
renamed: lib/multi.c -> lib/curl_multi.c
renamed: lib/netrc.c -> lib/curl_netrc.c
renamed: lib/non-ascii.c -> lib/curl_non_ascii.c
renamed: lib/curl_non-ascii.h -> lib/curl_non_ascii.h
renamed: lib/nonblock.c -> lib/curl_nonblock.c
renamed: lib/nss.c -> lib/curl_nss.c
renamed: lib/nwlib.c -> lib/curl_nwlib.c
renamed: lib/nwos.c -> lib/curl_nwos.c
renamed: lib/openldap.c -> lib/curl_openldap.c
renamed: lib/parsedate.c -> lib/curl_parsedate.c
renamed: lib/pingpong.c -> lib/curl_pingpong.c
renamed: lib/polarssl.c -> lib/curl_polarssl.c
renamed: lib/pop3.c -> lib/curl_pop3.c
renamed: lib/progress.c -> lib/curl_progress.c
renamed: lib/qssl.c -> lib/curl_qssl.c
renamed: lib/rawstr.c -> lib/curl_rawstr.c
renamed: lib/rtsp.c -> lib/curl_rtsp.c
renamed: lib/security.c -> lib/curl_security.c
renamed: lib/select.c -> lib/curl_select.c
renamed: lib/sendf.c -> lib/curl_sendf.c
renamed: lib/share.c -> lib/curl_share.c
renamed: lib/slist.c -> lib/curl_slist.c
renamed: lib/smtp.c -> lib/curl_smtp.c
renamed: lib/socks.c -> lib/curl_socks.c
renamed: lib/socks_gssapi.c -> lib/curl_socks_gssapi.c
renamed: lib/socks_sspi.c -> lib/curl_socks_sspi.c
renamed: lib/speedcheck.c -> lib/curl_speedcheck.c
renamed: lib/splay.c -> lib/curl_splay.c
renamed: lib/ssh.c -> lib/curl_ssh.c
renamed: lib/sslgen.c -> lib/curl_sslgen.c
renamed: lib/ssluse.c -> lib/curl_ssluse.c
renamed: lib/strdup.c -> lib/curl_strdup.c
renamed: lib/strequal.c -> lib/curl_strequal.c
renamed: lib/strerror.c -> lib/curl_strerror.c
renamed: lib/strtok.c -> lib/curl_strtok.c
renamed: lib/strtoofft.c -> lib/curl_strtoofft.c
renamed: lib/telnet.c -> lib/curl_telnet.c
renamed: lib/tftp.c -> lib/curl_tftp.c
renamed: lib/timeval.c -> lib/curl_timeval.c
renamed: lib/transfer.c -> lib/curl_transfer.c
renamed: lib/url.c -> lib/curl_url.c
renamed: lib/version.c -> lib/curl_version.c
renamed: lib/warnless.c -> lib/curl_warnless.c
renamed: lib/wildcard.c -> lib/curl_wildcard.c
----------------------------------------
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76 private header files renamed to use our standard naming scheme.
This change affects 322 files in libcurl's source tree.
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This is the same fix applied for the conditional code that uses select()
that was already done for the poll specific code in commit
b61e8b81f5038.
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We found a problem with ftp transfer using libcurl (7.23 and 7.25)
inside an application which is receiving unix signals (SIGUSR1,
SIGUSR2...) almost continuously. (Linux 2.4, PowerPC, HAVE_POLL_FINE
defined).
Curl_socket_check() uses poll() to wait for the socket, and retries it
when a signal is received (EINTR). However, if a signal is received and
it also happens that the timeout has been reached, Curl_socket_check()
returns -1 instead of 0 (indicating an error instead of a timeout).
In our case, the result is an aborted connection even before the ftp
banner is received from the server, and a return value of
CURLE_OUT_OF_MEMORY from curl_easy_perform() (Curl_pp_multi_statemach(),
in pingpong.c, actually returns OOM if Curl_socket_check() fails :-)
Funny to debug on a system on which OOM is a possible cause).
Bug: http://curl.haxx.se/mail/lib-2012-07/0122.html
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This function was introduced in commit 5527417afae0 and as pointed out
by Gokhan Sengun, the array with poll structs must large enough to hold
3 sockets since that is what the function can accept. It could be noted
that he had this fixed in his patch as posted in
http://curl.haxx.se/mail/lib-2011-12/0179.html
Bug: http://curl.haxx.se/mail/lib-2011-12/0228.html
Reported by: Gokhan Sengun
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This offers an alternative to the existing Curl_socket_ready() API which
only checks one socket for read and one for write.
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If a socket is larger than FD_SETSIZE, avoid using FD_SET() on the
platforms where this is possible.
Bug: http://curl.haxx.se/bug/view.cgi?id=3413274
Reported by: Tim Starling
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Just internal stuff...
Curl_safefree is now a macro defined in memdebug.h instead of a function
prototyped in url.h and implemented in url.c, so inclusion of url.h is no
longer required in order to simply use Curl_safefree.
Provide definition of macro WHILE_FALSE in setup_once.h in order to allow
other macros such as DEBUGF and DEBUGASSERT, and code using it, to compile
without 'conditional expression is constant' warnings.
The WHILE_FALSE stuff fixes 150+ MSVC compiler warnings.
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Typecast when converting to int from long to avoid some compiler warnings
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Typecasts added since I changed more code to use long for timeouts
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It was mostly typecasted to int all over the code so switching to long
instead all over should be a net gain.
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Fix compiler warning: variable was set but never used
Fix compiler warning: clobber ignored
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By the use of a the new lib/checksrc.pl script that checks that our
basic source style rules are followed.
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POLLIN, and sets POLLERR without setting POLLIN and POLLOUT. In some
libcurl code execution paths this could trigger busy wait loops with
high CPU usage until a timeout condition aborted the loop.
This fix for Curl_poll adresses the above in a libcurl-wide mode.
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This also implies the removal of the winmm.lib dependency for WIN32.
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select/poll calls will only be retried upon EINTR failures as
it previously was in lib/select.c revision 1.29
In this way Curl_socket_ready() and Curl_poll() will again fail
on any select/poll errors different than EINTR.
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consistency
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to find that it crashed miserably, and this was due to some select()isms left
in the code. This was due to API restrictions in c-ares 1.3.x, but with the
upcoming c-ares 1.4.0 this is no longer the case so now libcurl runs much
better with c-ares and the multi interface with > 1024 file descriptors in
use.
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I also switched from calloc() to malloc() as a minor performance boost since
the rest of the code fills in the structs fine anyway - and they must for the
case when we use the stack-based auto variable array instead of the allocated
one.
I made the loop filling in poll_fds[] break when poll_nfds is reached as a
minor speed improvement.
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'pending_ms' may be used uninitialized in this function
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Curl_socket_ready(), Curl_poll() and Curl_select() when these are called
with a zero timeout or a timeout value indicating a blocking call should
be performed.
These unnecessary calls to gettimeofday() got introduced in 7.16.2 when
fixing 'timeout would restart when signal caught while awaiting socket
events' on 20 March 2007.
- Move some loop breaking logic from the while clause into the loop,
avoiding compiler warning 'assignment within conditional expression'
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function that deprecates the curl_multi_socket() function. Using the new
function the application tell libcurl what action that was found in the
socket that it passes in. This gives a significant performance boost as it
allows libcurl to avoid a call to poll()/select() for every call to
curl_multi_socket*().
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setup_once.h
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to complete with no delay and actually find out what happened with
the socket. As well as detection of socket send()able condition.
This also allows removal of a Cygwin specific block of code.
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uses poll() when a fine poll() is available, so now libcurl can be
built without select() support at all if a fine poll() is available.
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For completeness sake, wait_ms() might also get interrupted when
experimental CURL_ACKNOWLEDGE_EINTR is defined.
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or Curl_poll() with a non-zero timeout both functions would restart the
specified timeout. This could even lead to the extreme case that if a
signal arrived with a frecuency lower to the specified timeout neither
function would ever exit.
Added experimental symbol definition check CURL_ACKNOWLEDGE_EINTR in
Curl_select() and Curl_poll(). When compiled with CURL_ACKNOWLEDGE_EINTR
defined both functions will return as soon as a signal is caught. Use it
at your own risk, all calls to these functions in the library should be
revisited and checked before fully supporting this feature.
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Curl_poll() which is called whenever not a single valid file descriptor is
passed to these functions.
Improve readibility using a poll() macro to replace WSApoll().
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1) the progress callback gets called more frequently (at times)
2) libcurl *might* call the callback when it receives a signal
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