mirror of https://github.com/openssl/openssl
111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/*
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* Copyright 2022 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/crypto.h>
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#include "internal/e_os.h"
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/* system-specific variants defining OSSL_sleep() */
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#if defined(OPENSSL_SYS_UNIX) || defined(__DJGPP__)
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void OSSL_sleep(uint64_t millis)
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{
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# ifdef OPENSSL_SYS_VXWORKS
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struct timespec ts;
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ts.tv_sec = (long int) (millis / 1000);
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ts.tv_nsec = (long int) (millis % 1000) * 1000000ul;
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nanosleep(&ts, NULL);
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# elif defined(__TANDEM)
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# if !defined(_REENTRANT)
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# include <cextdecs.h(PROCESS_DELAY_)>
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/* HPNS does not support usleep for non threaded apps */
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PROCESS_DELAY_(millis * 1000);
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# elif defined(_SPT_MODEL_)
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# include <spthread.h>
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# include <spt_extensions.h>
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usleep(millis * 1000);
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# else
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usleep(millis * 1000);
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# endif
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# else
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usleep(millis * 1000);
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# endif
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}
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#elif defined(_WIN32)
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# include <windows.h>
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void OSSL_sleep(uint64_t millis)
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{
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/*
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* Windows' Sleep() takes a DWORD argument, which is smaller than
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* a uint64_t, so we need to split the two to shut the compiler up.
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*/
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DWORD dword_times;
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DWORD i;
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dword_times = (DWORD)(millis >> (8 * sizeof(DWORD)));
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millis &= (DWORD)-1;
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if (dword_times > 0) {
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for (i = dword_times; i-- > 0;)
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Sleep((DWORD)-1);
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/*
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* The loop above slept 1 millisec less on each iteration than it
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* should, this compensates by sleeping as many milliseconds as there
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* were iterations. Yes, this is nit picky!
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*/
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Sleep(dword_times);
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}
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/* Now, sleep the remaining milliseconds */
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Sleep((DWORD)(millis));
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}
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#else
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/* Fallback to a busy wait */
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# include "internal/time.h"
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static void ossl_sleep_secs(uint64_t secs)
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{
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/*
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* sleep() takes an unsigned int argument, which is smaller than
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* a uint64_t, so it needs to be called in smaller increments.
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*/
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unsigned int uint_times;
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unsigned int i;
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uint_times = (unsigned int)(secs >> (8 * sizeof(unsigned int)));
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if (uint_times > 0) {
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for (i = uint_times; i-- > 0;)
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sleep((unsigned int)-1);
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/*
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* The loop above slept 1 second less on each iteration than it
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* should, this compensates by sleeping as many seconds as there were
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* iterations. Yes, this is nit picky!
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*/
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sleep(uint_times);
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}
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}
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static void ossl_sleep_millis(uint64_t millis)
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{
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const OSSL_TIME finish
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= ossl_time_add(ossl_time_now(), ossl_ms2time(millis));
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while (ossl_time_compare(ossl_time_now(), finish) < 0)
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/* busy wait */ ;
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}
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void OSSL_sleep(uint64_t millis)
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{
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ossl_sleep_secs(millis / 1000);
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ossl_sleep_millis(millis % 1000);
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}
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#endif /* defined(OPENSSL_SYS_UNIX) || defined(__DJGPP__) */
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