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99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
/* See the end of this file for copyright, license, and warranty information. */
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#include <ardix/device.h>
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#include <ardix/kent.h>
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#include <ardix/list.h>
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#include <ardix/malloc.h>
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#include <ardix/types.h>
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#include <errno.h>
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#include <stddef.h>
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struct kent *devices_kent = NULL;
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static void devices_destroy(struct kent *kent)
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{
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/* should never be executed because the root devices kent is immortal */
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free(kent);
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}
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/** Initialize the devices subsystem. */
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int devices_init(void)
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{
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if (devices_kent != NULL)
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return -EEXIST;
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devices_kent = malloc(sizeof(*devices_kent));
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if (devices_kent == NULL)
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return -ENOMEM;
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devices_kent->parent = kent_root;
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devices_kent->destroy = devices_destroy;
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return kent_init(devices_kent);
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}
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static void device_destroy(struct kent *kent)
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{
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struct device *dev = kent_to_device(kent);
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free(dev);
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}
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int device_init(struct device *dev)
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{
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if (dev->kent.destroy == NULL)
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dev->kent.destroy = device_destroy;
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if (dev->kent.parent == NULL)
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dev->kent.parent = devices_kent;
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mutex_init(&dev->lock);
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return kent_init(&dev->kent);
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}
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static void device_kevent_destroy(struct kent *kent)
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{
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struct kevent *event = container_of(kent, struct kevent, kent);
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struct device_kevent *device_kevent = container_of(event, struct device_kevent, kevent);
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free(device_kevent);
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}
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struct device_kevent *device_kevent_create(struct device *device, enum device_kevent_flags flags)
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{
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struct device_kevent *event = atomic_malloc(sizeof(*event));
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if (event == NULL)
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return NULL;
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event->flags = flags;
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event->kevent.kind = KEVENT_DEVICE;
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event->kevent.kent.parent = &device->kent;
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event->kevent.kent.destroy = device_kevent_destroy;
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int err = kent_init(&event->kevent.kent);
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if (err) {
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free(event);
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event = NULL;
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}
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return event;
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}
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void device_kevent_create_and_dispatch(struct device *device, enum device_kevent_flags flags)
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{
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struct device_kevent *event = device_kevent_create(device, flags);
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if (event != NULL)
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kevent_dispatch(&event->kevent);
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}
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/*
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* This file is part of Ardix.
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* Copyright (c) 2020, 2021 Felix Kopp <owo@fef.moe>.
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*
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* Ardix is non-violent software: you may only use, redistribute,
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* and/or modify it under the terms of the CNPLv6+ as found in
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* the LICENSE file in the source code root directory or at
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* <https://git.pixie.town/thufie/CNPL>.
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*
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* Ardix comes with ABSOLUTELY NO WARRANTY, to the extent
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* permitted by applicable law. See the CNPLv6+ for details.
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*/
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