diff options
Diffstat (limited to 'c_src/include/linux/rwsem.h')
-rw-r--r-- | c_src/include/linux/rwsem.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/c_src/include/linux/rwsem.h b/c_src/include/linux/rwsem.h new file mode 100644 index 00000000..f851d6a2 --- /dev/null +++ b/c_src/include/linux/rwsem.h @@ -0,0 +1,29 @@ +#ifndef __TOOLS_LINUX_RWSEM_H +#define __TOOLS_LINUX_RWSEM_H + +#include <pthread.h> + +struct rw_semaphore { + pthread_rwlock_t lock; +}; + +#define __RWSEM_INITIALIZER(name) \ + { .lock = PTHREAD_RWLOCK_INITIALIZER } + +#define DECLARE_RWSEM(name) \ + struct rw_semaphore name = __RWSEM_INITIALIZER(name) + +static inline void init_rwsem(struct rw_semaphore *lock) +{ + pthread_rwlock_init(&lock->lock, NULL); +} + +#define down_read(l) pthread_rwlock_rdlock(&(l)->lock) +#define down_read_killable(l) (pthread_rwlock_rdlock(&(l)->lock), 0) +#define down_read_trylock(l) (!pthread_rwlock_tryrdlock(&(l)->lock)) +#define up_read(l) pthread_rwlock_unlock(&(l)->lock) + +#define down_write(l) pthread_rwlock_wrlock(&(l)->lock) +#define up_write(l) pthread_rwlock_unlock(&(l)->lock) + +#endif /* __TOOLS_LINUX_RWSEM_H */ |