time-keeping: keep timestamp in multi, always update

Always use curlx_now() when calling Curl_pgrs_now(data). Tests with the
"manual" updates to now proved differ more then 100ms in parallel testing.

Add `curlx_nowp()` to set current time into a struct curltime.
Add `curlx_ptimediff_ms() and friends, passing pointers.

Update documentation.

Closes #19998
This commit is contained in:
Stefan Eissing 2025-12-18 13:55:07 +01:00 committed by Daniel Stenberg
parent 308c347c8b
commit b4be1f271e
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61 changed files with 471 additions and 502 deletions

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@ -2814,7 +2814,7 @@ static CURLcode setopt_offt(struct Curl_easy *data, CURLoption option,
return CURLE_BAD_FUNCTION_ARGUMENT;
s->max_send_speed = offt;
Curl_rlimit_init(&data->progress.ul.rlimit, offt, offt,
&data->progress.now);
Curl_pgrs_now(data));
break;
case CURLOPT_MAX_RECV_SPEED_LARGE:
/*
@ -2825,7 +2825,7 @@ static CURLcode setopt_offt(struct Curl_easy *data, CURLoption option,
return CURLE_BAD_FUNCTION_ARGUMENT;
s->max_recv_speed = offt;
Curl_rlimit_init(&data->progress.dl.rlimit, offt, offt,
&data->progress.now);
Curl_pgrs_now(data));
break;
case CURLOPT_RESUME_FROM_LARGE:
/*