Example programs for CURLMOPT_TIMERFUNCTION don't handle timeout_ms == -1 correctly

[mkauf]

I did this

Studied the code of the example programs for CURLMOPT_TIMERFUNCTION:

• asiohiper.cpp
• evhiperfifo.c
• ghiper.c
• hiperfifo.c
• multi-uv.c

These example programs don't handle timeout_ms == -1 correctly.

I expected the following

The documentation for CURLMOPT_TIMERFUNCTION says:

A timeout_ms value of -1 means you should delete your timer.

These example programs call curl_multi_socket_action() instead:

• asiohiper.cpp
• evhiperfifo.c
• multi-uv.c

These exampe programs schedule a new timer instead:

• ghiper.c
• hiperfifo.c

Note that the timeout value 0 also has a special meaning:

A timeout_ms value of 0 means you should call curl_multi_socket_action or curl_multi_perform (once) as soon as possible.

curl/libcurl version

7.52.1

operating system

All

[bagder]

The good thing is that just having an extra timer running or calling curl_multi_socket_action() an extra time are all pretty harmless actions.

[bagder]

multi-uv.c seems to handle it already.

I've fixed asiohiper.cpp and evhiperfifo.c in commit d6bb1f1

[mkauf]

Thanks!