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examples: Wait recommended 100ms when no file descriptors are ready

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Prior to this change when no file descriptors were ready on platforms
other than Windows the multi examples would sleep whatever was in
timeout, which may or may not have been less than the minimum
recommended value [1] of 100ms.

[1]: http://curl.haxx.se/libcurl/c/curl_multi_fdset.html
This commit is contained in:
Jay Satiro 2014-11-17 02:26:03 -05:00 committed by Daniel Stenberg
parent 9406ab91a2
commit cb13fad733
9 changed files with 108 additions and 72 deletions
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20
docs/examples/fopen.c
View File

@ -168,20 +168,24 @@ static int fill_buffer(URL_FILE *file, size_t want)
}
/* On success the value of maxfd is guaranteed to be >= -1. We call
select(maxfd + 1, ...); specially in case of (maxfd == -1) we call
select(0, ...), which is basically equal to sleeping the timeout. On
Windows we can't sleep via select without a dummy socket and instead
we Sleep() for 100ms which is the minimum suggested value in the
select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
to sleep 100ms, which is the minimum suggested value in the
curl_multi_fdset() doc. */
#ifdef _WIN32
if(maxfd == -1) {
#ifdef _WIN32
Sleep(100);
rc = 0;
}
else
#else
/* Portable sleep for platforms other than Windows. */
struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
rc = select(0, NULL, NULL, NULL, &wait);
#endif
{
}
else {
/* Note that on some platforms 'timeout' may be modified by select().
If you need access to the original value save a copy beforehand. */
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
}

20
docs/examples/imap-multi.c
View File

@ -120,20 +120,24 @@ int main(void)
}
/* On success the value of maxfd is guaranteed to be >= -1. We call
select(maxfd + 1, ...); specially in case of (maxfd == -1) we call
select(0, ...), which is basically equal to sleeping the timeout. On
Windows we can't sleep via select without a dummy socket and instead
we Sleep() for 100ms which is the minimum suggested value in the
select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
to sleep 100ms, which is the minimum suggested value in the
curl_multi_fdset() doc. */
#ifdef _WIN32
if(maxfd == -1) {
#ifdef _WIN32
Sleep(100);
rc = 0;
}
else
#else
/* Portable sleep for platforms other than Windows. */
struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
rc = select(0, NULL, NULL, NULL, &wait);
#endif
{
}
else {
/* Note that on some platforms 'timeout' may be modified by select().
If you need access to the original value save a copy beforehand. */
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
}

20
docs/examples/multi-app.c
View File

@ -109,20 +109,24 @@ int main(void)
}
/* On success the value of maxfd is guaranteed to be >= -1. We call
select(maxfd + 1, ...); specially in case of (maxfd == -1) we call
select(0, ...), which is basically equal to sleeping the timeout. On
Windows we can't sleep via select without a dummy socket and instead
we Sleep() for 100ms which is the minimum suggested value in the
select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
to sleep 100ms, which is the minimum suggested value in the
curl_multi_fdset() doc. */
#ifdef _WIN32
if(maxfd == -1) {
#ifdef _WIN32
Sleep(100);
rc = 0;
}
else
#else
/* Portable sleep for platforms other than Windows. */
struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
rc = select(0, NULL, NULL, NULL, &wait);
#endif
{
}
else {
/* Note that on some platforms 'timeout' may be modified by select().
If you need access to the original value save a copy beforehand. */
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
}

20
docs/examples/multi-debugcallback.c
View File

@ -183,20 +183,24 @@ int main(void)
}
/* On success the value of maxfd is guaranteed to be >= -1. We call
select(maxfd + 1, ...); specially in case of (maxfd == -1) we call
select(0, ...), which is basically equal to sleeping the timeout. On
Windows we can't sleep via select without a dummy socket and instead
we Sleep() for 100ms which is the minimum suggested value in the
select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
to sleep 100ms, which is the minimum suggested value in the
curl_multi_fdset() doc. */
#ifdef _WIN32
if(maxfd == -1) {
#ifdef _WIN32
Sleep(100);
rc = 0;
}
else
#else
/* Portable sleep for platforms other than Windows. */
struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
rc = select(0, NULL, NULL, NULL, &wait);
#endif
{
}
else {
/* Note that on some platforms 'timeout' may be modified by select().
If you need access to the original value save a copy beforehand. */
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
}

20
docs/examples/multi-double.c
View File

@ -98,20 +98,24 @@ int main(void)
}
/* On success the value of maxfd is guaranteed to be >= -1. We call
select(maxfd + 1, ...); specially in case of (maxfd == -1) we call
select(0, ...), which is basically equal to sleeping the timeout. On
Windows we can't sleep via select without a dummy socket and instead
we Sleep() for 100ms which is the minimum suggested value in the
select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
to sleep 100ms, which is the minimum suggested value in the
curl_multi_fdset() doc. */
#ifdef _WIN32
if(maxfd == -1) {
#ifdef _WIN32
Sleep(100);
rc = 0;
}
else
#else
/* Portable sleep for platforms other than Windows. */
struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
rc = select(0, NULL, NULL, NULL, &wait);
#endif
{
}
else {
/* Note that on some platforms 'timeout' may be modified by select().
If you need access to the original value save a copy beforehand. */
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
}

20
docs/examples/multi-post.c
View File

@ -119,20 +119,24 @@ int main(void)
}
/* On success the value of maxfd is guaranteed to be >= -1. We call
select(maxfd + 1, ...); specially in case of (maxfd == -1) we call
select(0, ...), which is basically equal to sleeping the timeout. On
Windows we can't sleep via select without a dummy socket and instead
we Sleep() for 100ms which is the minimum suggested value in the
select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
to sleep 100ms, which is the minimum suggested value in the
curl_multi_fdset() doc. */
#ifdef _WIN32
if(maxfd == -1) {
#ifdef _WIN32
Sleep(100);
rc = 0;
}
else
#else
/* Portable sleep for platforms other than Windows. */
struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
rc = select(0, NULL, NULL, NULL, &wait);
#endif
{
}
else {
/* Note that on some platforms 'timeout' may be modified by select().
If you need access to the original value save a copy beforehand. */
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
}

20
docs/examples/multi-single.c
View File

@ -96,20 +96,24 @@ int main(void)
}
/* On success the value of maxfd is guaranteed to be >= -1. We call
select(maxfd + 1, ...); specially in case of (maxfd == -1) we call
select(0, ...), which is basically equal to sleeping the timeout. On
Windows we can't sleep via select without a dummy socket and instead
we Sleep() for 100ms which is the minimum suggested value in the
select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
to sleep 100ms, which is the minimum suggested value in the
curl_multi_fdset() doc. */
#ifdef _WIN32
if(maxfd == -1) {
#ifdef _WIN32
Sleep(100);
rc = 0;
}
else
#else
/* Portable sleep for platforms other than Windows. */
struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
rc = select(0, NULL, NULL, NULL, &wait);
#endif
{
}
else {
/* Note that on some platforms 'timeout' may be modified by select().
If you need access to the original value save a copy beforehand. */
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
}

20
docs/examples/pop3-multi.c
View File

@ -120,20 +120,24 @@ int main(void)
}
/* On success the value of maxfd is guaranteed to be >= -1. We call
select(maxfd + 1, ...); specially in case of (maxfd == -1) we call
select(0, ...), which is basically equal to sleeping the timeout. On
Windows we can't sleep via select without a dummy socket and instead
we Sleep() for 100ms which is the minimum suggested value in the
select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
to sleep 100ms, which is the minimum suggested value in the
curl_multi_fdset() doc. */
#ifdef _WIN32
if(maxfd == -1) {
#ifdef _WIN32
Sleep(100);
rc = 0;
}
else
#else
/* Portable sleep for platforms other than Windows. */
struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
rc = select(0, NULL, NULL, NULL, &wait);
#endif
{
}
else {
/* Note that on some platforms 'timeout' may be modified by select().
If you need access to the original value save a copy beforehand. */
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
}

20
docs/examples/smtp-multi.c
View File

@ -187,20 +187,24 @@ int main(void)
}
/* On success the value of maxfd is guaranteed to be >= -1. We call
select(maxfd + 1, ...); specially in case of (maxfd == -1) we call
select(0, ...), which is basically equal to sleeping the timeout. On
Windows we can't sleep via select without a dummy socket and instead
we Sleep() for 100ms which is the minimum suggested value in the
select(maxfd + 1, ...); specially in case of (maxfd == -1) there are
no fds ready yet so we call select(0, ...) --or Sleep() on Windows--
to sleep 100ms, which is the minimum suggested value in the
curl_multi_fdset() doc. */
#ifdef _WIN32
if(maxfd == -1) {
#ifdef _WIN32
Sleep(100);
rc = 0;
}
else
#else
/* Portable sleep for platforms other than Windows. */
struct timeval wait = { 0, 100 * 1000 }; /* 100ms */
rc = select(0, NULL, NULL, NULL, &wait);
#endif
{
}
else {
/* Note that on some platforms 'timeout' may be modified by select().
If you need access to the original value save a copy beforehand. */
rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
}