mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 03:27:39 +00:00
fa20edc44d
- Remove most __ASSEMBLER__ __LINKER__ ifdefs - Rename libc/intrin/bits.h to libc/serialize.h - Block pthread cancelation in fchmodat() polyfill - Remove `clang-format off` statements in third_party
39 lines
1.5 KiB
C
39 lines
1.5 KiB
C
#ifndef NSYNC_COUNTER_H_
|
|
#define NSYNC_COUNTER_H_
|
|
#include "third_party/nsync/atomic.h"
|
|
#include "third_party/nsync/time.h"
|
|
COSMOPOLITAN_C_START_
|
|
|
|
/* An nsync_counter represents an unsigned integer that can count up and down,
|
|
and wake waiters when zero. */
|
|
typedef struct nsync_counter_s_ *nsync_counter;
|
|
|
|
/* Return a freshly allocated nsync_counter with the specified value,
|
|
of NULL if an nsync_counter cannot be created.
|
|
|
|
Any non-NULL returned value should be passed to nsync_counter_free() when no
|
|
longer needed. */
|
|
nsync_counter nsync_counter_new(uint32_t value);
|
|
|
|
/* Free resources associated with c. Requires that c was allocated by
|
|
nsync_counter_new(), and no concurrent or future operations are applied to
|
|
c. */
|
|
void nsync_counter_free(nsync_counter c);
|
|
|
|
/* Add delta to c, and return its new value. It is a checkable runtime error
|
|
to decrement c below 0, or to increment c (i.e., apply a delta > 0) after a
|
|
waiter has waited. */
|
|
uint32_t nsync_counter_add(nsync_counter c, int32_t delta);
|
|
|
|
/* Return the current value of c. */
|
|
uint32_t nsync_counter_value(nsync_counter c);
|
|
|
|
/* Wait until c has value 0, or until abs_deadline, then return
|
|
the value of c. It is a checkable runtime error to increment c after
|
|
a waiter may have been woken due to the counter reaching zero.
|
|
If abs_deadline==nsync_time_no_deadline, the deadline
|
|
is far in the future. */
|
|
uint32_t nsync_counter_wait(nsync_counter c, nsync_time abs_deadline);
|
|
|
|
COSMOPOLITAN_C_END_
|
|
#endif /* NSYNC_COUNTER_H_ */
|