96 } console_ring;  variable
189 	if (console_ring.len != 0) {  in console_init()
193 	kmem_alloc(kernel_map, (vm_offset_t *)&console_ring.buffer,  in console_init()
198 	console_ring.buffer   += PAGE_SIZE; /* Skip past the first guard page. */  in console_init()
199 	console_ring.len       = KERN_CONSOLE_RING_SIZE;  in console_init()
200 	console_ring.used      = 0;  in console_init()
201 	console_ring.nreserved = 0;  in console_init()
202 	console_ring.read_ptr  = console_ring.buffer;  in console_init()
203 	console_ring.write_ptr = console_ring.buffer;  in console_init()
205 	lck_mtx_init(&console_ring.flush_lock, &console_lck_grp, LCK_ATTR_NULL);  in console_init()
206 	lck_ticket_init(&console_ring.write_lock, &console_lck_grp);  in console_init()
215 	return console_ring.len == KERN_CONSOLE_RING_SIZE;  in is_console_initialized()
307 	lck_ticket_lock(&console_ring.write_lock, &console_lck_grp);  in console_ring_reserve_space()
308 	if ((console_ring.len - console_ring.used) >= nchars) {  in console_ring_reserve_space()
309 		console_ring.used += nchars;  in console_ring_reserve_space()
311 		os_atomic_inc(&console_ring.nreserved, relaxed);  in console_ring_reserve_space()
314 		write_ptr = console_ring.write_ptr;  in console_ring_reserve_space()
317 		const ptrdiff_t write_index = console_ring.write_ptr - console_ring.buffer;  in console_ring_reserve_space()
318 		console_ring.write_ptr = console_ring.buffer + ((write_index + nchars) % console_ring.len);  in console_ring_reserve_space()
320 	lck_ticket_unlock(&console_ring.write_lock);  in console_ring_reserve_space()
334 	assert(console_ring.nreserved > 0);  in console_ring_unreserve_space()
336 	os_atomic_dec(&console_ring.nreserved, relaxed);  in console_ring_unreserve_space()
356 	assert(console_ring.nreserved > 0);  in console_ring_put()
359 	if ((*write_ptr - console_ring.buffer) == console_ring.len) {  in console_ring_put()
360 		*write_ptr = console_ring.buffer;  in console_ring_put()
401 		if (__probable(!in_debugger) && fail_fast && !lck_mtx_try_lock(&console_ring.flush_lock)) {  in console_ring_try_empty()
404 			lck_mtx_lock(&console_ring.flush_lock);  in console_ring_try_empty()
408 			lck_ticket_lock(&console_ring.write_lock, &console_lck_grp);  in console_ring_try_empty()
415 			while (os_atomic_load(&console_ring.nreserved, relaxed) > 0) {  in console_ring_try_empty()
421 		nchars_out = MIN(console_ring.used, (int)sizeof(flush_buf));  in console_ring_try_empty()
424 		size_before_wrap = (int)((console_ring.buffer + console_ring.len) - console_ring.read_ptr);  in console_ring_try_empty()
435 			memcpy(flush_buf, console_ring.read_ptr, nchars_out);  in console_ring_try_empty()
436 			const ptrdiff_t read_index = console_ring.read_ptr - console_ring.buffer;  in console_ring_try_empty()
437 			console_ring.read_ptr = console_ring.buffer + ((read_index + nchars_out) % console_ring.len);  in console_ring_try_empty()
438 			console_ring.used -= nchars_out;  in console_ring_try_empty()
442 			lck_ticket_unlock(&console_ring.write_lock);  in console_ring_try_empty()
455 			lck_mtx_unlock(&console_ring.flush_lock);  in console_ring_try_empty()
742 	T_ASSERT_EQ_INT(console_ring.len, KERN_CONSOLE_RING_SIZE, "Console ring size is not correct.");  in console_serial_test()