Curle
58a944ee6e
Lainlib is libk. It is separate from Helix, which will become the 3D engine common to the kernel and the userspace.
33 lines
725 B
C
33 lines
725 B
C
#pragma once
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#include <stdbool.h>
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#include <stdatomic.h>
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/************************
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*** Team Kitty, 2020 ***
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*** Chroma ***
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***********************/
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/* This file provides a simple implementation of a ticket-based locking system.
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* You should probably prefer Spinlock over Ticketlock.
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*
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* Create a new lock with NEW_TICKETLOCK(),
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* lock a resource with TicketLock().
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*
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* Use TicketUnlock() to free the resource after you are done.
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*
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*/
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typedef struct {
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atomic_size_t NowServing;
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atomic_size_t NextTicket;
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} ticketlock_t;
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#define NEW_TICKETLOCK() (ticketlock_t{0})
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void TicketLock(ticketlock_t* Lock);
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bool TicketAttemptLock(ticketlock_t* Lock);
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void TicketUnlock(ticketlock_t* Lock);
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