72 lines
1.6 KiB
C
72 lines
1.6 KiB
C
#include <socks/tty.h>
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static struct vm_cache tty_driver_cache = {
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.c_name = "tty_driver",
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.c_obj_size = sizeof(struct tty_driver),
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};
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static struct queue tty_drivers;
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static spin_lock_t tty_drivers_lock;
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kern_status_t tty_bootstrap(void)
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{
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vm_cache_init(&tty_driver_cache);
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tty_drivers = QUEUE_INIT;
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tty_drivers_lock = SPIN_LOCK_INIT;
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return KERN_OK;
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}
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struct tty_driver *tty_driver_create(struct kext *self, const char *name)
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{
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struct tty_driver *driver = vm_cache_alloc(&tty_driver_cache, VM_NORMAL);
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if (!driver) {
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return NULL;
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}
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kern_status_t status = driver_init(&driver->tty_base, self, name);
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if (status != KERN_OK) {
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vm_cache_free(&tty_driver_cache, driver);
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return NULL;
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}
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strncpy(driver->tty_name, name, sizeof driver->tty_name - 1);
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return driver;
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}
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kern_status_t tty_driver_destroy(struct tty_driver *driver)
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{
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/* TODO */
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return KERN_UNIMPLEMENTED;
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}
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kern_status_t tty_driver_register(struct tty_driver *driver)
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{
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kern_status_t status = driver_register(&driver->tty_base);
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if (status != KERN_OK) {
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return status;
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}
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unsigned long flags;
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spin_lock_irqsave(&tty_drivers_lock, &flags);
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queue_push_back(&tty_drivers, &driver->tty_head);
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spin_unlock_irqrestore(&tty_drivers_lock, flags);
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return KERN_OK;
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}
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kern_status_t tty_driver_unregister(struct tty_driver *driver)
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{
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if (driver->tty_base.drv_major == DEV_MAJOR_INVALID) {
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return KERN_INVALID_ARGUMENT;
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}
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unsigned long flags;
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spin_lock_irqsave(&tty_drivers_lock, &flags);
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queue_delete(&tty_drivers, &driver->tty_head);
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spin_unlock_irqrestore(&tty_drivers_lock, flags);
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return driver_unregister(&driver->tty_base);
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}
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