Read the value of a counter.
#include <zircon/syscalls.h> zx_status_t zx_counter_read(zx_handle_t handle, int64_t* value);
zx_counter_read() reads the value of the counter referenced by handle into the integer value points at.
handle must have ZX_RIGHT_READ.
zx_counter_read() returns ZX_OK on success.
On failure, an error value is returned.
ZX_ERR_WRONG_TYPE if handle is not a counter handle.
ZX_ERR_ACCESS_DENIED if handle does not have ZX_RIGHT_READ.
ZX_ERR_INVALID_ARGS if value is an invalid pointer.