96 } console_ring;  variable
195 	if (console_ring.len != 0) {  in console_init()
199 	kmem_alloc(kernel_map, (vm_offset_t *)&console_ring.buffer,  in console_init()
204 	console_ring.buffer   += PAGE_SIZE; /* Skip past the first guard page. */  in console_init()
205 	console_ring.len       = KERN_CONSOLE_RING_SIZE;  in console_init()
206 	console_ring.used      = 0;  in console_init()
207 	console_ring.nreserved = 0;  in console_init()
208 	console_ring.read_ptr  = console_ring.buffer;  in console_init()
209 	console_ring.write_ptr = console_ring.buffer;  in console_init()
211 	lck_mtx_init(&console_ring.flush_lock, &console_lck_grp, LCK_ATTR_NULL);  in console_init()
212 	lck_ticket_init(&console_ring.write_lock, &console_lck_grp);  in console_init()
221 	return console_ring.len == KERN_CONSOLE_RING_SIZE;  in is_console_initialized()
314 	lck_ticket_lock(&console_ring.write_lock, &console_lck_grp);  in console_ring_reserve_space()
315 	if ((console_ring.len - console_ring.used) >= nchars) {  in console_ring_reserve_space()
316 		console_ring.used += nchars;  in console_ring_reserve_space()
318 		os_atomic_inc(&console_ring.nreserved, relaxed);  in console_ring_reserve_space()
321 		write_ptr = console_ring.write_ptr;  in console_ring_reserve_space()
324 		const ptrdiff_t write_index = console_ring.write_ptr - console_ring.buffer;  in console_ring_reserve_space()
325 		console_ring.write_ptr = console_ring.buffer + ((write_index + nchars) % console_ring.len);  in console_ring_reserve_space()
327 	lck_ticket_unlock(&console_ring.write_lock);  in console_ring_reserve_space()
341 	assert(console_ring.nreserved > 0);  in console_ring_unreserve_space()
343 	os_atomic_dec(&console_ring.nreserved, relaxed);  in console_ring_unreserve_space()
363 	assert(console_ring.nreserved > 0);  in console_ring_put()
366 	if ((*write_ptr - console_ring.buffer) == console_ring.len) {  in console_ring_put()
367 		*write_ptr = console_ring.buffer;  in console_ring_put()
408 		if (__probable(!in_debugger) && fail_fast && !lck_mtx_try_lock(&console_ring.flush_lock)) {  in console_ring_try_empty()
411 			lck_mtx_lock(&console_ring.flush_lock);  in console_ring_try_empty()
415 			lck_ticket_lock(&console_ring.write_lock, &console_lck_grp);  in console_ring_try_empty()
422 			while (os_atomic_load(&console_ring.nreserved, relaxed) > 0) {  in console_ring_try_empty()
428 		nchars_out = MIN(console_ring.used, (int)sizeof(flush_buf));  in console_ring_try_empty()
431 		size_before_wrap = (int)((console_ring.buffer + console_ring.len) - console_ring.read_ptr);  in console_ring_try_empty()
442 			memcpy(flush_buf, console_ring.read_ptr, nchars_out);  in console_ring_try_empty()
443 			const ptrdiff_t read_index = console_ring.read_ptr - console_ring.buffer;  in console_ring_try_empty()
444 			console_ring.read_ptr = console_ring.buffer + ((read_index + nchars_out) % console_ring.len);  in console_ring_try_empty()
445 			console_ring.used -= nchars_out;  in console_ring_try_empty()
449 			lck_ticket_unlock(&console_ring.write_lock);  in console_ring_try_empty()
462 			lck_mtx_unlock(&console_ring.flush_lock);  in console_ring_try_empty()
764 	T_ASSERT_EQ_INT(console_ring.len, KERN_CONSOLE_RING_SIZE, "Console ring size is not correct.");  in console_serial_test()