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Improve cancellations, randomness, and time

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- Exhaustively document cancellation points
- Rename SIGCANCEL to SIGTHR just like BSDs
- Further improve POSIX thread cancellations
- Ensure asynchronous cancellations work correctly
- Elevate the quality of getrandom() and getentropy()
- Make futexes cancel correctly on OpenBSD 6.x and 7.x
- Add reboot.com and shutdown.com to examples directory
- Remove underscore prefix from awesome timespec_*() APIs
- Create assertions that help verify our cancellation points
- Remove bad timespec APIs (cmp generalizes eq/ne/gt/gte/lt/lte)
This commit is contained in:
Justine Tunney 2022-11-05 19:49:41 -07:00
parent 0d7c265392
commit 3f0bcdc3ef
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GPG key ID: BE714B4575D6E328
173 changed files with 1599 additions and 782 deletions
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22
third_party/nsync/time.h vendored
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@ -17,39 +17,39 @@ COSMOPOLITAN_C_START_
typedef struct timespec nsync_time;
/* A deadline infinitely far in the future. */
#define nsync_time_no_deadline _timespec_max
#define nsync_time_no_deadline timespec_max
/* The zero delay, or an expired deadline. */
#define nsync_time_zero _timespec_zero
#define nsync_time_zero timespec_zero
/* Return the current time since the epoch. */
#define nsync_time_now() _timespec_real()
#define nsync_time_now() timespec_real()
/* Sleep for the specified delay. Returns the unslept time which may be
non-zero if the call was interrupted. */
#define nsync_time_sleep(a) _timespec_sleep(a)
#define nsync_time_sleep(a) timespec_sleep(a)
/* Sleep until the specified time. Returns 0 on success, and EINTR
if the call was interrupted. */
#define nsync_time_sleep_until(a) _timespec_sleep_until(a)
#define nsync_time_sleep_until(a) timespec_sleep_until(a)
/* Return a+b */
#define nsync_time_add(a, b) _timespec_add(a, b)
#define nsync_time_add(a, b) timespec_add(a, b)
/* Return a-b */
#define nsync_time_sub(a, b) _timespec_sub(a, b)
#define nsync_time_sub(a, b) timespec_sub(a, b)
/* Return +ve, 0, or -ve according to whether a>b, a==b, or a<b. */
#define nsync_time_cmp(a, b) _timespec_cmp(a, b)
#define nsync_time_cmp(a, b) timespec_cmp(a, b)
/* Return the specified number of milliseconds as a time. */
#define nsync_time_ms(a) _timespec_frommillis(a)
#define nsync_time_ms(a) timespec_frommillis(a)
/* Return the specified number of microseconds as a time. */
#define nsync_time_us(a) _timespec_frommicros(a)
#define nsync_time_us(a) timespec_frommicros(a)
/* Return the specified number of nanoseconds as a time. */
#define nsync_time_ns(a) _timespec_fromnanos(a)
#define nsync_time_ns(a) timespec_fromnanos(a)
/* Return an nsync_time constructed from second and nanosecond
components */