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Chris TateandMateus Mamede Lage
c5308c7f10
- Resolve MinGW clock and sleep calls with standalone Win32 implementations. - Cover realtime, monotonic, sleep, and invalid-input contracts on Windows. Fixes #255 Co-authored-by: Mateus Mamede Lage <23098414+mmamedel@users.noreply.github.com>
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
#include "scr_runtime.h"
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#include <errno.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <time.h>
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static int fail(const char *message) {
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fprintf(stderr, "%s\n", message);
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return 1;
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}
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static int64_t elapsed_ns(const struct timespec *before,
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const struct timespec *after) {
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return (int64_t)(after->tv_sec - before->tv_sec) * INT64_C(1000000000) +
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(after->tv_nsec - before->tv_nsec);
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}
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int main(void) {
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struct timespec realtime;
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if (clock_gettime(CLOCK_REALTIME, &realtime) != 0)
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return fail("CLOCK_REALTIME failed");
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if (realtime.tv_sec < 1577836800)
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return fail("CLOCK_REALTIME predates 2020");
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struct timespec before;
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struct timespec after;
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if (clock_gettime(CLOCK_MONOTONIC, &before) != 0)
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return fail("CLOCK_MONOTONIC failed");
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struct timespec request = {0, 2000000};
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struct timespec remain = {-1, -1};
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if (nanosleep(&request, &remain) != 0) return fail("nanosleep failed");
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if (remain.tv_sec != 0 || remain.tv_nsec != 0)
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return fail("nanosleep left a remainder");
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if (clock_gettime(CLOCK_MONOTONIC, &after) != 0)
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return fail("second CLOCK_MONOTONIC failed");
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if (elapsed_ns(&before, &after) < 1000000)
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return fail("nanosleep returned early");
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errno = 0;
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if (clock_gettime((clockid_t)-1, &after) != -1 || errno != EINVAL)
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return fail("invalid clock was accepted");
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struct timespec invalid = {0, 1000000000};
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errno = 0;
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if (nanosleep(&invalid, NULL) != -1 || errno != EINVAL)
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return fail("invalid sleep was accepted");
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puts("win32 time shims ok");
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return 0;
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}
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