[apple/xnu.git] / osfmk / kern / mk_timer.c

/*
 * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 2000 Apple Computer, Inc.  All rights reserved.
 *
 * HISTORY
 *
 * 29 June 2000 (debo)
 *  Created.
 */

#include <mach/mach_types.h>
#include <mach/mach_traps.h>
#include <mach/mach_port_server.h>

#include <mach/mk_timer.h>

#include <ipc/ipc_space.h>

#include <kern/mk_timer.h>
#include <kern/thread_call.h>

static zone_t		mk_timer_zone;

static mach_port_qos_t mk_timer_qos = {
	FALSE, TRUE, 0, sizeof (mk_timer_expire_msg_t)
};

static void	mk_timer_expire(
				void			*p0,
				void			*p1);

mach_port_name_t
mk_timer_create_trap(
	__unused struct mk_timer_create_trap_args *args)
{
	mk_timer_t			timer;
	ipc_space_t			myspace = current_space();
	mach_port_name_t	name = MACH_PORT_NULL;
	ipc_port_t			port;
	kern_return_t		result;

	timer = (mk_timer_t)zalloc(mk_timer_zone);
	if (timer == NULL)
		return (MACH_PORT_NULL);

	result = mach_port_allocate_qos(myspace, MACH_PORT_RIGHT_RECEIVE,
														&mk_timer_qos, &name);
	if (result == KERN_SUCCESS)
		result = ipc_port_translate_receive(myspace, name, &port);

	if (result != KERN_SUCCESS) {
		zfree(mk_timer_zone, timer);

		return (MACH_PORT_NULL);
	}

	simple_lock_init(&timer->lock, 0);
	thread_call_setup(&timer->call_entry, mk_timer_expire, timer);
	timer->is_armed = timer->is_dead = FALSE;
	timer->active = 0;

	timer->port = port;
	ipc_kobject_set_atomically(port, (ipc_kobject_t)timer, IKOT_TIMER);

	port->ip_srights++;
	ip_reference(port);
	ip_unlock(port);

	return (name);
}

void
mk_timer_port_destroy(
	ipc_port_t			port)
{
	mk_timer_t			timer = NULL;

	ip_lock(port);
	if (ip_kotype(port) == IKOT_TIMER) {
		timer = (mk_timer_t)port->ip_kobject;
		assert(timer != NULL);
		ipc_kobject_set_atomically(port, IKO_NULL, IKOT_NONE);
		simple_lock(&timer->lock);
		assert(timer->port == port);
	}
	ip_unlock(port);

	if (timer != NULL) {
		if (thread_call_cancel(&timer->call_entry))
			timer->active--;
		timer->is_armed = FALSE;

		timer->is_dead = TRUE;
		if (timer->active == 0) {
			simple_unlock(&timer->lock);
			zfree(mk_timer_zone, timer);

			ipc_port_release_send(port);
			return;
		}

		simple_unlock(&timer->lock);
	}
}

void
mk_timer_init(void)
{
	int			s = sizeof (mk_timer_data_t);

	assert(!(mk_timer_zone != NULL));

	mk_timer_zone = zinit(s, (4096 * s), (16 * s), "mk_timer");

	zone_change(mk_timer_zone, Z_NOENCRYPT, TRUE);
}

static void
mk_timer_expire(
	void			*p0,
	__unused void		*p1)
{
	mk_timer_t			timer = p0;
	ipc_port_t			port;

	simple_lock(&timer->lock);

	if (timer->active > 1) {
		timer->active--;
		simple_unlock(&timer->lock);
		return;
	}

	port = timer->port;
	assert(port != IP_NULL);
	assert(timer->active == 1);

	while (timer->is_armed && timer->active == 1) {
		mk_timer_expire_msg_t		msg;

		timer->is_armed = FALSE;
		simple_unlock(&timer->lock);

		msg.header.msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, 0);
		msg.header.msgh_remote_port = port;
		msg.header.msgh_local_port = MACH_PORT_NULL;
		msg.header.msgh_reserved = msg.header.msgh_id = 0;

		msg.unused[0] = msg.unused[1] = msg.unused[2] = 0;

		(void) mach_msg_send_from_kernel_proper(&msg.header, sizeof (msg));

		simple_lock(&timer->lock);
	}

	if (--timer->active == 0 && timer->is_dead) {
		simple_unlock(&timer->lock);
		zfree(mk_timer_zone, timer);

		ipc_port_release_send(port);
		return;
	}

	simple_unlock(&timer->lock);
}

/*
 * mk_timer_destroy_trap: Destroy the Mach port associated with a timer
 *
 * Parameters:  args                     User argument descriptor (see below)
 *
 * Indirect:     args->name               Mach port name
 *
 *
 * Returns:        0                      Success
 *                !0                      Not success           
 *
 */
kern_return_t
mk_timer_destroy_trap(
	struct mk_timer_destroy_trap_args *args)
{
	mach_port_name_t	name = args->name;
	ipc_space_t			myspace = current_space();
	ipc_port_t			port;
	kern_return_t		result;

	result = ipc_port_translate_receive(myspace, name, &port);
	if (result != KERN_SUCCESS)
		return (result);

	if (ip_kotype(port) == IKOT_TIMER) {
		ip_unlock(port);
		result = mach_port_destroy(myspace, name);
	}
	else {
		ip_unlock(port);
		result = KERN_INVALID_ARGUMENT;
	}

	return (result);
}

/*
 * mk_timer_arm_trap: Start (arm) a timer
 *
 * Parameters:  args                     User argument descriptor (see below)
 *
 * Indirect:     args->name               Mach port name
 *               args->expire_time        Time when timer expires
 *
 *
 * Returns:        0                      Success
 *                !0                      Not success           
 *
 */
kern_return_t
mk_timer_arm_trap(
	struct mk_timer_arm_trap_args *args)
{
	mach_port_name_t		name = args->name;
	uint64_t			expire_time = args->expire_time;
	mk_timer_t			timer;
	ipc_space_t			myspace = current_space();
	ipc_port_t			port;
	kern_return_t			result;

	result = ipc_port_translate_receive(myspace, name, &port);
	if (result != KERN_SUCCESS)
		return (result);

	if (ip_kotype(port) == IKOT_TIMER) {
		timer = (mk_timer_t)port->ip_kobject;
		assert(timer != NULL);

		simple_lock(&timer->lock);
		assert(timer->port == port);
		ip_unlock(port);

		if (!timer->is_dead) {
			timer->is_armed = TRUE;

			if (expire_time > mach_absolute_time()) {
				if (!thread_call_enter_delayed_with_leeway(&timer->call_entry, NULL,
									   expire_time, 0, THREAD_CALL_DELAY_USER_NORMAL))
					timer->active++;
			}
			else {
				if (!thread_call_enter1(&timer->call_entry, NULL))
					timer->active++;
			}
		}

		simple_unlock(&timer->lock);
	}
	else {
		ip_unlock(port);
		result = KERN_INVALID_ARGUMENT;
	}

	return (result);
}

/*
 * mk_timer_cancel_trap: Cancel a timer
 *
 * Parameters:  args                     User argument descriptor (see below)
 *
 * Indirect:     args->name               Mach port name
 *               args->result_time        The armed time of the cancelled timer (return value)
 *
 *
 * Returns:        0                      Success
 *                !0                      Not success           
 *
 */
kern_return_t
mk_timer_cancel_trap(
	struct mk_timer_cancel_trap_args *args)
{
	mach_port_name_t	name = args->name;
	mach_vm_address_t	result_time_addr = args->result_time; 
	uint64_t			armed_time = 0;
	mk_timer_t			timer;
	ipc_space_t			myspace = current_space();
	ipc_port_t			port;
	kern_return_t		result;

	result = ipc_port_translate_receive(myspace, name, &port);
	if (result != KERN_SUCCESS)
		return (result);

	if (ip_kotype(port) == IKOT_TIMER) {
		timer = (mk_timer_t)port->ip_kobject;
		assert(timer != NULL);
		simple_lock(&timer->lock);
		assert(timer->port == port);
		ip_unlock(port);

		if (timer->is_armed) {
			armed_time = timer->call_entry.tc_call.deadline;
			if (thread_call_cancel(&timer->call_entry))
				timer->active--;
			timer->is_armed = FALSE;
		}

		simple_unlock(&timer->lock);
	}
	else {
		ip_unlock(port);
		result = KERN_INVALID_ARGUMENT;
	}

	if (result == KERN_SUCCESS)
		if (	result_time_addr != 0										&&
				copyout((void *)&armed_time, result_time_addr,
								sizeof (armed_time)) != 0					)
			result = KERN_FAILURE;

	return (result);
}
Commit	Line	Data
1c79356b	1	/*
91447636	2	* Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
1c79356b	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
1c79356b	5	*
2d21ac55 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
8f6c56a5	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
1c79356b A	27	*/
	28	/*
	29	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	30	*
	31	* HISTORY
	32	*
	33	* 29 June 2000 (debo)
	34	* Created.
	35	*/
	36
	37	#include <mach/mach_types.h>
91447636	38	#include <mach/mach_traps.h>
1c79356b A	39	#include <mach/mach_port_server.h>
	40
	41	#include <mach/mk_timer.h>
	42
	43	#include <ipc/ipc_space.h>
	44
	45	#include <kern/mk_timer.h>
	46	#include <kern/thread_call.h>
	47
	48	static zone_t mk_timer_zone;
	49
	50	static mach_port_qos_t mk_timer_qos = {
	51	FALSE, TRUE, 0, sizeof (mk_timer_expire_msg_t)
	52	};
	53
	54	static void mk_timer_expire(
	55	void *p0,
	56	void *p1);
	57
	58	mach_port_name_t
91447636 A	59	mk_timer_create_trap(
91447636 A	60	__unused struct mk_timer_create_trap_args *args)
1c79356b A	61	{
	62	mk_timer_t timer;
	63	ipc_space_t myspace = current_space();
	64	mach_port_name_t name = MACH_PORT_NULL;
	65	ipc_port_t port;
	66	kern_return_t result;
	67
	68	timer = (mk_timer_t)zalloc(mk_timer_zone);
	69	if (timer == NULL)
	70	return (MACH_PORT_NULL);
	71
	72	result = mach_port_allocate_qos(myspace, MACH_PORT_RIGHT_RECEIVE,
	73	&mk_timer_qos, &name);
	74	if (result == KERN_SUCCESS)
	75	result = ipc_port_translate_receive(myspace, name, &port);
	76
	77	if (result != KERN_SUCCESS) {
91447636	78	zfree(mk_timer_zone, timer);
1c79356b A	79
	80	return (MACH_PORT_NULL);
	81	}
	82
91447636	83	simple_lock_init(&timer->lock, 0);
316670eb	84	thread_call_setup(&timer->call_entry, mk_timer_expire, timer);
1c79356b A	85	timer->is_armed = timer->is_dead = FALSE;
	86	timer->active = 0;
	87
	88	timer->port = port;
	89	ipc_kobject_set_atomically(port, (ipc_kobject_t)timer, IKOT_TIMER);
	90
	91	port->ip_srights++;
	92	ip_reference(port);
	93	ip_unlock(port);
	94
	95	return (name);
	96	}
	97
	98	void
	99	mk_timer_port_destroy(
	100	ipc_port_t port)
	101	{
	102	mk_timer_t timer = NULL;
	103
	104	ip_lock(port);
	105	if (ip_kotype(port) == IKOT_TIMER) {
	106	timer = (mk_timer_t)port->ip_kobject;
	107	assert(timer != NULL);
	108	ipc_kobject_set_atomically(port, IKO_NULL, IKOT_NONE);
	109	simple_lock(&timer->lock);
	110	assert(timer->port == port);
	111	}
	112	ip_unlock(port);
	113
	114	if (timer != NULL) {
	115	if (thread_call_cancel(&timer->call_entry))
	116	timer->active--;
	117	timer->is_armed = FALSE;
	118
	119	timer->is_dead = TRUE;
	120	if (timer->active == 0) {
	121	simple_unlock(&timer->lock);
91447636	122	zfree(mk_timer_zone, timer);
1c79356b A	123
	124	ipc_port_release_send(port);
	125	return;
	126	}
	127
	128	simple_unlock(&timer->lock);
	129	}
	130	}
	131
	132	void
55e303ae	133	mk_timer_init(void)
1c79356b A	134	{
	135	int s = sizeof (mk_timer_data_t);
	136
	137	assert(!(mk_timer_zone != NULL));
	138
	139	mk_timer_zone = zinit(s, (4096 * s), (16 * s), "mk_timer");
0b4c1975 A	140
0b4c1975 A	141	zone_change(mk_timer_zone, Z_NOENCRYPT, TRUE);
1c79356b A	142	}
	143
	144	static void
	145	mk_timer_expire(
	146	void *p0,
91447636	147	__unused void *p1)
1c79356b	148	{
1c79356b A	149	mk_timer_t timer = p0;
	150	ipc_port_t port;
	151
1c79356b A	152	simple_lock(&timer->lock);
	153
	154	if (timer->active > 1) {
	155	timer->active--;
	156	simple_unlock(&timer->lock);
	157	return;
	158	}
	159
	160	port = timer->port;
	161	assert(port != IP_NULL);
55e303ae	162	assert(timer->active == 1);
1c79356b	163
55e303ae	164	while (timer->is_armed && timer->active == 1) {
1c79356b A	165	mk_timer_expire_msg_t msg;
	166
	167	timer->is_armed = FALSE;
1c79356b A	168	simple_unlock(&timer->lock);
	169
	170	msg.header.msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, 0);
	171	msg.header.msgh_remote_port = port;
	172	msg.header.msgh_local_port = MACH_PORT_NULL;
	173	msg.header.msgh_reserved = msg.header.msgh_id = 0;
	174
55e303ae A	175	msg.unused[0] = msg.unused[1] = msg.unused[2] = 0;
55e303ae A	176
b0d623f7	177	(void) mach_msg_send_from_kernel_proper(&msg.header, sizeof (msg));
1c79356b A	178
	179	simple_lock(&timer->lock);
	180	}
	181
	182	if (--timer->active == 0 && timer->is_dead) {
	183	simple_unlock(&timer->lock);
91447636	184	zfree(mk_timer_zone, timer);
1c79356b A	185
	186	ipc_port_release_send(port);
	187	return;
	188	}
	189
	190	simple_unlock(&timer->lock);
	191	}
	192
316670eb A	193	/*
	194	* mk_timer_destroy_trap: Destroy the Mach port associated with a timer
	195	*
	196	* Parameters: args User argument descriptor (see below)
	197	*
	198	* Indirect: args->name Mach port name
	199	*
	200	*
	201	* Returns: 0 Success
	202	* !0 Not success
	203	*
	204	*/
1c79356b	205	kern_return_t
91447636 A	206	mk_timer_destroy_trap(
91447636 A	207	struct mk_timer_destroy_trap_args *args)
1c79356b	208	{
91447636	209	mach_port_name_t name = args->name;
1c79356b A	210	ipc_space_t myspace = current_space();
	211	ipc_port_t port;
	212	kern_return_t result;
	213
	214	result = ipc_port_translate_receive(myspace, name, &port);
	215	if (result != KERN_SUCCESS)
	216	return (result);
	217
	218	if (ip_kotype(port) == IKOT_TIMER) {
	219	ip_unlock(port);
	220	result = mach_port_destroy(myspace, name);
	221	}
	222	else {
	223	ip_unlock(port);
	224	result = KERN_INVALID_ARGUMENT;
	225	}
	226
	227	return (result);
	228	}
	229
316670eb A	230	/*
	231	* mk_timer_arm_trap: Start (arm) a timer
	232	*
	233	* Parameters: args User argument descriptor (see below)
	234	*
	235	* Indirect: args->name Mach port name
	236	* args->expire_time Time when timer expires
	237	*
	238	*
	239	* Returns: 0 Success
	240	* !0 Not success
	241	*
	242	*/
1c79356b	243	kern_return_t
91447636 A	244	mk_timer_arm_trap(
91447636 A	245	struct mk_timer_arm_trap_args *args)
1c79356b	246	{
39236c6e	247	mach_port_name_t name = args->name;
91447636	248	uint64_t expire_time = args->expire_time;
1c79356b A	249	mk_timer_t timer;
	250	ipc_space_t myspace = current_space();
	251	ipc_port_t port;
39236c6e	252	kern_return_t result;
1c79356b	253
1c79356b A	254	result = ipc_port_translate_receive(myspace, name, &port);
	255	if (result != KERN_SUCCESS)
	256	return (result);
	257
	258	if (ip_kotype(port) == IKOT_TIMER) {
	259	timer = (mk_timer_t)port->ip_kobject;
	260	assert(timer != NULL);
39236c6e	261
1c79356b A	262	simple_lock(&timer->lock);
	263	assert(timer->port == port);
	264	ip_unlock(port);
	265
55e303ae	266	if (!timer->is_dead) {
55e303ae A	267	timer->is_armed = TRUE;
55e303ae A	268
39236c6e A	269	if (expire_time > mach_absolute_time()) {
	270	if (!thread_call_enter_delayed_with_leeway(&timer->call_entry, NULL,
	271	expire_time, 0, THREAD_CALL_DELAY_USER_NORMAL))
	272	timer->active++;
	273	}
	274	else {
	275	if (!thread_call_enter1(&timer->call_entry, NULL))
	276	timer->active++;
	277	}
55e303ae	278	}
1c79356b	279
1c79356b A	280	simple_unlock(&timer->lock);
	281	}
	282	else {
	283	ip_unlock(port);
	284	result = KERN_INVALID_ARGUMENT;
	285	}
	286
	287	return (result);
	288	}
	289
316670eb A	290	/*
	291	* mk_timer_cancel_trap: Cancel a timer
	292	*
	293	* Parameters: args User argument descriptor (see below)
	294	*
	295	* Indirect: args->name Mach port name
	296	* args->result_time The armed time of the cancelled timer (return value)
	297	*
	298	*
	299	* Returns: 0 Success
	300	* !0 Not success
	301	*
	302	*/
1c79356b	303	kern_return_t
91447636 A	304	mk_timer_cancel_trap(
91447636 A	305	struct mk_timer_cancel_trap_args *args)
1c79356b	306	{
91447636 A	307	mach_port_name_t name = args->name;
91447636 A	308	mach_vm_address_t result_time_addr = args->result_time;
0b4e3aa0	309	uint64_t armed_time = 0;
1c79356b A	310	mk_timer_t timer;
	311	ipc_space_t myspace = current_space();
	312	ipc_port_t port;
	313	kern_return_t result;
	314
	315	result = ipc_port_translate_receive(myspace, name, &port);
	316	if (result != KERN_SUCCESS)
	317	return (result);
	318
	319	if (ip_kotype(port) == IKOT_TIMER) {
	320	timer = (mk_timer_t)port->ip_kobject;
	321	assert(timer != NULL);
	322	simple_lock(&timer->lock);
	323	assert(timer->port == port);
	324	ip_unlock(port);
	325
	326	if (timer->is_armed) {
316670eb	327	armed_time = timer->call_entry.tc_call.deadline;
1c79356b A	328	if (thread_call_cancel(&timer->call_entry))
	329	timer->active--;
	330	timer->is_armed = FALSE;
	331	}
	332
	333	simple_unlock(&timer->lock);
	334	}
	335	else {
	336	ip_unlock(port);
	337	result = KERN_INVALID_ARGUMENT;
	338	}
	339
	340	if (result == KERN_SUCCESS)
91447636 A	341	if ( result_time_addr != 0 &&
91447636 A	342	copyout((void *)&armed_time, result_time_addr,
1c79356b A	343	sizeof (armed_time)) != 0 )
	344	result = KERN_FAILURE;
	345
	346	return (result);
	347	}