#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);
call_entry_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");
}
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);
}
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);
}
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 (!thread_call_enter_delayed(&timer->call_entry, expire_time))
timer->active++;
}
simple_unlock(&timer->lock);
}
else {
ip_unlock(port);
result = KERN_INVALID_ARGUMENT;
}
return (result);
}
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.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);
}