diff options
Diffstat (limited to 'docs/examples/multi-debugcallback.c')
| -rw-r--r-- | docs/examples/multi-debugcallback.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/docs/examples/multi-debugcallback.c b/docs/examples/multi-debugcallback.c index 31dec5472..5fb86bea1 100644 --- a/docs/examples/multi-debugcallback.c +++ b/docs/examples/multi-debugcallback.c @@ -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); } |