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Improve quality of our ANSI C clock() function

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It now works most excellently across all supported operating
sytsems (earlier it didn't work on NT and XNU). Demo code is
available in examples/clock.c and this change also adds some
of the newer ANSI C time functions like timespec_get(), plus
timespec_getres() which hasn't even come out yet as it's C23
This commit is contained in:
Justine Tunney 2022-09-05 21:43:49 -07:00
parent 7ff0ea8c13
commit 12d9e1e128
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GPG key ID: BE714B4575D6E328
24 changed files with 254 additions and 76 deletions
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25
libc/thread/pthread_create.c
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@ -33,13 +33,13 @@ static int PosixThread(void *arg, int tid) {
((cthread_t)__get_tls())->pthread = pt;
pt->rc = pt->start_routine(pt->arg);
}
if (atomic_load_explicit(&pt->status, memory_order_relaxed) ==
if (atomic_load_explicit(&pt->status, memory_order_acquire) ==
kPosixThreadDetached) {
atomic_store_explicit(&pt->status, kPosixThreadZombie,
memory_order_relaxed);
memory_order_release);
} else {
atomic_store_explicit(&pt->status, kPosixThreadTerminated,
memory_order_relaxed);
memory_order_release);
}
return 0;
}
@ -47,6 +47,25 @@ static int PosixThread(void *arg, int tid) {
/**
* Creates thread.
*
* Here's the OSI model of threads in Cosmopolitan:
*
* ┌──────────────────┐
* │ pthread_create() │ - Standard
* └─────────┬────────┘ Abstraction
* ┌─────────┴────────┐
* │ _spawn() │ - Cosmopolitan
* └─────────┬────────┘ Abstraction
* ┌─────────┴────────┐
* │ clone() │ - Polyfill
* └─────────┬────────┘
* ┌────────┬──┴──┬─┬─────────┐ - Kernel
* ┌─────┴─────┐ │ │┌┴──────┐ │ Interfaces
* │ sys_clone │ │ ││ tfork │ │
* └───────────┘ │ │└───────┘ ┌┴─────────────┐
* ┌───────────────┴──┐ ┌┴────────┐ │ CreateThread │
* │ bsdthread_create │ │ thr_new │ └──────────────┘
* └──────────────────┘ └─────────┘
*
* @return 0 on success, or errno on error
*/
int pthread_create(pthread_t *thread, const pthread_attr_t *attr,