--- /dev/null
+/*
+ * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
+ *
+ * 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. 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_LICENSE_HEADER_END@
+ */
+/*
+ * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
+ *
+ * HISTORY
+ *
+ * 16 January 2003 (debo)
+ * Created.
+ */
+
+#include <mach/mach_types.h>
+
+#include <kern/ipc_kobject.h>
+#include <kern/host_notify.h>
+
+#include <kern/queue.h>
+
+#include "mach/host_notify_reply.h"
+
+static zone_t host_notify_zone;
+decl_mutex_data(static,host_notify_lock)
+
+static queue_head_t host_notify_queue[HOST_NOTIFY_TYPE_MAX+1];
+
+static mach_msg_id_t host_notify_replyid[HOST_NOTIFY_TYPE_MAX+1] =
+ { HOST_CALENDAR_CHANGED_REPLYID };
+
+struct host_notify_entry {
+ queue_chain_t entries;
+ ipc_port_t port;
+};
+
+typedef struct host_notify_entry *host_notify_t;
+
+void
+host_notify_init(void)
+{
+ int i;
+
+ for (i = 0; i <= HOST_NOTIFY_TYPE_MAX; i++)
+ queue_init(&host_notify_queue[i]);
+
+ mutex_init(&host_notify_lock, ETAP_MISC_EVENT);
+
+ i = sizeof (struct host_notify_entry);
+ host_notify_zone =
+ zinit(i, (4096 * i), (16 * i), "host_notify");
+}
+
+kern_return_t
+host_request_notification(
+ host_t host,
+ host_flavor_t notify_type,
+ ipc_port_t port)
+{
+ host_notify_t entry;
+
+ if (host == HOST_NULL)
+ return (KERN_INVALID_ARGUMENT);
+
+ if (!IP_VALID(port))
+ return (KERN_INVALID_CAPABILITY);
+
+ if (notify_type > HOST_NOTIFY_TYPE_MAX || notify_type < 0)
+ return (KERN_INVALID_ARGUMENT);
+
+ entry = (host_notify_t)zalloc(host_notify_zone);
+ if (entry == NULL)
+ return (KERN_RESOURCE_SHORTAGE);
+
+ mutex_lock(&host_notify_lock);
+
+ ip_lock(port);
+ if (!ip_active(port) || ip_kotype(port) != IKOT_NONE) {
+ ip_unlock(port);
+
+ mutex_unlock(&host_notify_lock);
+ zfree(host_notify_zone, (vm_offset_t)entry);
+
+ return (KERN_FAILURE);
+ }
+
+ entry->port = port;
+ ipc_kobject_set_atomically(port, (ipc_kobject_t)entry, IKOT_HOST_NOTIFY);
+ ip_unlock(port);
+
+ enqueue_tail(&host_notify_queue[notify_type], (queue_entry_t)entry);
+ mutex_unlock(&host_notify_lock);
+
+ return (KERN_SUCCESS);
+}
+
+void
+host_notify_port_destroy(
+ ipc_port_t port)
+{
+ host_notify_t entry;
+
+ mutex_lock(&host_notify_lock);
+
+ ip_lock(port);
+ if (ip_kotype(port) == IKOT_HOST_NOTIFY) {
+ entry = (host_notify_t)port->ip_kobject;
+ assert(entry != NULL);
+ ipc_kobject_set_atomically(port, IKO_NULL, IKOT_NONE);
+ ip_unlock(port);
+
+ assert(entry->port == port);
+ remqueue(NULL, (queue_entry_t)entry);
+ mutex_unlock(&host_notify_lock);
+ zfree(host_notify_zone, (vm_offset_t)entry);
+
+ ipc_port_release_sonce(port);
+ return;
+ }
+ ip_unlock(port);
+
+ mutex_unlock(&host_notify_lock);
+}
+
+static void
+host_notify_all(
+ host_flavor_t notify_type,
+ mach_msg_header_t *msg,
+ mach_msg_size_t msg_size)
+{
+ queue_t notify_queue = &host_notify_queue[notify_type];
+
+ mutex_lock(&host_notify_lock);
+
+ if (!queue_empty(notify_queue)) {
+ queue_head_t send_queue;
+ host_notify_t entry;
+
+ send_queue = *notify_queue;
+ queue_init(notify_queue);
+
+ send_queue.next->prev = &send_queue;
+ send_queue.prev->next = &send_queue;
+
+ msg->msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_MOVE_SEND_ONCE, 0);
+ msg->msgh_local_port = MACH_PORT_NULL;
+ msg->msgh_id = host_notify_replyid[notify_type];
+ msg->msgh_reserved = 0;
+
+ while ((entry = (host_notify_t)dequeue(&send_queue)) != NULL) {
+ ipc_port_t port;
+
+ port = entry->port;
+ assert(port != IP_NULL);
+
+ ip_lock(port);
+ assert(ip_kotype(port) == IKOT_HOST_NOTIFY);
+ assert(port->ip_kobject == (ipc_kobject_t)entry);
+ ipc_kobject_set_atomically(port, IKO_NULL, IKOT_NONE);
+ ip_unlock(port);
+
+ mutex_unlock(&host_notify_lock);
+ zfree(host_notify_zone, (vm_offset_t)entry);
+
+ msg->msgh_remote_port = port;
+
+ (void) mach_msg_send_from_kernel(msg, msg_size);
+
+ mutex_lock(&host_notify_lock);
+ }
+ }
+
+ mutex_unlock(&host_notify_lock);
+}
+
+void
+host_notify_calendar_change(void)
+{
+ __Request__host_calendar_changed_t msg;
+
+ host_notify_all(HOST_NOTIFY_CALENDAR_CHANGE, &msg.Head, sizeof (msg));
+}
projects / apple / xnu.git / blobdiff