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time-keeping: keep timestamp in multi, always update

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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
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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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lib/rand.c
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@ -119,7 +119,8 @@ static CURLcode weak_random(struct Curl_easy *data,
static bool seeded = FALSE;
unsigned int rnd;
if(!seeded) {
struct curltime now = curlx_now();
struct curltime now;
curlx_pnow(&now);
randseed += (unsigned int)now.tv_usec + (unsigned int)now.tv_sec;
randseed = randseed * 1103515245 + 12345;
randseed = randseed * 1103515245 + 12345;