diff options
Diffstat (limited to 'docs/examples/multi-double.c')
-rw-r--r-- | docs/examples/multi-double.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/docs/examples/multi-double.c b/docs/examples/multi-double.c index ef3bf92fc..bc5b446ea 100644 --- a/docs/examples/multi-double.c +++ b/docs/examples/multi-double.c @@ -57,7 +57,7 @@ int main(int argc, char **argv) fd_set fdread; fd_set fdwrite; fd_set fdexcep; - int maxfd; + int maxfd = -1; FD_ZERO(&fdread); FD_ZERO(&fdwrite); @@ -71,8 +71,10 @@ int main(int argc, char **argv) curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd); /* In a real-world program you OF COURSE check the return code of the - function calls, *and* you make sure that maxfd is bigger than -1 so - that the call to select() below makes sense! */ + function calls. On success, the value of maxfd is guaranteed to be + greater or equal than -1. We call select(maxfd + 1, ...), specially in + case of (maxfd == -1), we call select(0, ...), which is basically equal + to sleep. */ rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout); |