diff options
| author | Maria Matejka <mq@ucw.cz> | 2021-02-04 15:52:42 +0100 |
|---|---|---|
| committer | Maria Matejka <mq@ucw.cz> | 2021-11-22 19:05:43 +0100 |
| commit | 1db83a507a9ae287815d62733d1337074993b433 (patch) | |
| tree | c18bab7948e6fd3d1ce6a4ce00f8f2e58b9e9bd6 /lib | |
| parent | feb17ced234bad13ae64b52a3f86241f74517997 (diff) | |
Locking subsystem: Just a global BIRD lock to begin with.
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/birdlib.h | 1 | ||||
| -rw-r--r-- | lib/lists.c | 2 | ||||
| -rw-r--r-- | lib/locking.h | 46 |
3 files changed, 48 insertions, 1 deletions
diff --git a/lib/birdlib.h b/lib/birdlib.h index dc8bd00f..3dc39d19 100644 --- a/lib/birdlib.h +++ b/lib/birdlib.h @@ -9,6 +9,7 @@ #ifndef _BIRD_BIRDLIB_H_ #define _BIRD_BIRDLIB_H_ +#include "sysdep/config.h" #include "lib/alloca.h" /* Ugly structure offset handling macros */ diff --git a/lib/lists.c b/lib/lists.c index 58d51073..dc2e4cbb 100644 --- a/lib/lists.c +++ b/lib/lists.c @@ -26,7 +26,7 @@ #define _BIRD_LISTS_C_ -#include "nest/bird.h" +#include "lib/birdlib.h" #include "lib/lists.h" LIST_INLINE int diff --git a/lib/locking.h b/lib/locking.h new file mode 100644 index 00000000..eb1bc8fa --- /dev/null +++ b/lib/locking.h @@ -0,0 +1,46 @@ +/* + * 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 |