mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-12 01:08:00 +00:00
7822917fc2
You can now do things like implement mutexes using futexes in your redbean lua code. This provides the fastest possible inter-process communication for your production systems when SQLite alone as ipc or things like pipes aren't sufficient.
28 lines
928 B
C
28 lines
928 B
C
#ifndef NSYNC_SEM_H_
|
|
#define NSYNC_SEM_H_
|
|
#include "third_party/nsync/time.h"
|
|
#if !(__ASSEMBLER__ + __LINKER__ + 0)
|
|
COSMOPOLITAN_C_START_
|
|
|
|
typedef struct nsync_semaphore_s_ {
|
|
void *sem_space[1]; /* [jart] reduced to 8 bytes */
|
|
} nsync_semaphore;
|
|
|
|
/* Initialize *s; the initial value is 0. */
|
|
void nsync_mu_semaphore_init(nsync_semaphore *s);
|
|
|
|
/* Wait until the count of *s exceeds 0, and decrement it. */
|
|
void nsync_mu_semaphore_p(nsync_semaphore *s);
|
|
|
|
/* Wait until one of: the count of *s is non-zero, in which case
|
|
decrement *s and return 0; or abs_deadline expires, in which case
|
|
return ETIMEDOUT. */
|
|
int nsync_mu_semaphore_p_with_deadline(nsync_semaphore *s,
|
|
nsync_time abs_deadline);
|
|
|
|
/* Ensure that the count of *s is at least 1. */
|
|
void nsync_mu_semaphore_v(nsync_semaphore *s);
|
|
|
|
COSMOPOLITAN_C_END_
|
|
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
|
|
#endif /* NSYNC_SEM_H_ */
|