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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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14
lib/ratelimit.h
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@ -26,6 +26,8 @@
#include "curlx/timeval.h"
struct Curl_easy;
/* This is a rate limiter that provides "tokens" to be consumed
* per second with a "burst" rate limitation. Example:
* A rate limit of 1 megabyte per second with a burst rate of 1.5MB.
@ -62,14 +64,14 @@ struct Curl_rlimit {
void Curl_rlimit_init(struct Curl_rlimit *r,
curl_off_t rate_per_s,
curl_off_t burst_per_s,
struct curltime *pts);
const struct curltime *pts);
/* Start ratelimiting with the given timestamp. Resets available tokens. */
void Curl_rlimit_start(struct Curl_rlimit *r, struct curltime *pts);
void Curl_rlimit_start(struct Curl_rlimit *r, const struct curltime *pts);
/* How many milliseconds to wait until token are available again. */
timediff_t Curl_rlimit_wait_ms(struct Curl_rlimit *r,
struct curltime *pts);
const struct curltime *pts);
/* Return if rate limiting of tokens is active */
bool Curl_rlimit_active(struct Curl_rlimit *r);
@ -77,16 +79,16 @@ bool Curl_rlimit_is_blocked(struct Curl_rlimit *r);
/* Return how many tokens are available to spend, may be negative */
curl_off_t Curl_rlimit_avail(struct Curl_rlimit *r,
struct curltime *pts);
const struct curltime *pts);
/* Drain tokens from the ratelimit, return how many are now available. */
void Curl_rlimit_drain(struct Curl_rlimit *r,
size_t tokens,
struct curltime *pts);
const struct curltime *pts);
/* Block/unblock ratelimiting. A blocked ratelimit has 0 tokens available. */
void Curl_rlimit_block(struct Curl_rlimit *r,
bool activate,
struct curltime *pts);
const struct curltime *pts);
#endif /* HEADER_Curl_rlimit_H */