mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-12-22 09:41:54 +00:00
47 lines
1.4 KiB
C
47 lines
1.4 KiB
C
/*
|
|
* BIRD Library -- Locking
|
|
*
|
|
* (c) 2020--2021 Maria Matejka <mq@jmq.cz>
|
|
*
|
|
* Can be freely distributed and used under the terms of the GNU GPL.
|
|
*/
|
|
|
|
#ifndef _BIRD_LOCKING_H_
|
|
#define _BIRD_LOCKING_H_
|
|
|
|
struct domain_generic;
|
|
|
|
/* Here define the global lock order; first to last. */
|
|
struct lock_order {
|
|
struct domain_generic *the_bird;
|
|
};
|
|
|
|
#define LOCK_ORDER_DEPTH (sizeof(struct lock_order) / sizeof(struct domain_generic *))
|
|
|
|
extern _Thread_local struct lock_order locking_stack;
|
|
extern _Thread_local struct domain_generic **last_locked;
|
|
|
|
#define DOMAIN(type) struct domain__##type
|
|
#define DEFINE_DOMAIN(type) DOMAIN(type) { struct domain_generic *type; }
|
|
|
|
#define DOMAIN_NEW(type, name) (DOMAIN(type)) { .type = domain_new(name) }
|
|
struct domain_generic *domain_new(const char *name);
|
|
|
|
#define DOMAIN_NULL(type) (DOMAIN(type)) {}
|
|
|
|
#define LOCK_DOMAIN(type, d) do_lock(((d).type), &(locking_stack.type))
|
|
#define UNLOCK_DOMAIN(type, d) do_unlock(((d).type), &(locking_stack.type))
|
|
|
|
/* Internal for locking */
|
|
void do_lock(struct domain_generic *dg, struct domain_generic **lsp);
|
|
void do_unlock(struct domain_generic *dg, struct domain_generic **lsp);
|
|
|
|
/* Use with care. To be removed in near future. */
|
|
DEFINE_DOMAIN(the_bird);
|
|
extern DOMAIN(the_bird) the_bird_domain;
|
|
|
|
#define the_bird_lock() LOCK_DOMAIN(the_bird, the_bird_domain)
|
|
#define the_bird_unlock() UNLOCK_DOMAIN(the_bird, the_bird_domain)
|
|
|
|
#endif
|