timer_create - create a timer
#include <zircon/syscalls.h>
zx_status_t zx_timer_create(uint32_t options, uint32_t clock_id, zx_handle_t* out);
timer_create() creates a timer, an object that can signal when a specified point in time has been reached. The only valid clock_id is ZX_CLOCK_MONOTONIC.
The options value specifies the coalescing behavior which controls whether the system can fire the time earlier or later depending on other pending timers.
The possible values are:
- ZX_TIMER_SLACK_CENTER coalescing is allowed with earlier and later timers.
- ZX_TIMER_SLACK_EARLY coalescing is allowed only with earlier timers.
- ZX_TIMER_SLACK_LATE coalescing is allowed only with later timers.
Passing 0 in options is equivalent to ZX_TIMER_SLACK_CENTER.
The returned handle has the ZX_RIGHT_DUPLICATE, ZX_RIGHT_TRANSFER, ZX_RIGHT_READ and ZX_RIGHT_WRITE right.
TODO(ZX-2399)
timer_create() returns ZX_OK on success. In the event of failure, a negative error value is returned.
ZX_ERR_INVALID_ARGS out is an invalid pointer or NULL or options is not one of the ZX_TIMER_SLACK values or clock_id is any value other than ZX_CLOCK_MONOTONIC.
ZX_ERR_NO_MEMORY Failure due to lack of memory. There is no good way for userspace to handle this (unlikely) error. In a future build this error will no longer occur.