diff options
| -rw-r--r-- | ubifs-utils/Makemodule.am | 1 | ||||
| -rw-r--r-- | ubifs-utils/common/rwsem.h | 19 |
2 files changed, 20 insertions, 0 deletions
diff --git a/ubifs-utils/Makemodule.am b/ubifs-utils/Makemodule.am index 9f33f0d..ece8a6e 100644 --- a/ubifs-utils/Makemodule.am +++ b/ubifs-utils/Makemodule.am @@ -7,6 +7,7 @@ common_SOURCES = \ ubifs-utils/common/bitops.c \ ubifs-utils/common/spinlock.h \ ubifs-utils/common/mutex.h \ + ubifs-utils/common/rwsem.h \ ubifs-utils/common/kmem.h \ ubifs-utils/common/kmem.c \ ubifs-utils/common/defs.h \ diff --git a/ubifs-utils/common/rwsem.h b/ubifs-utils/common/rwsem.h new file mode 100644 index 0000000..3761724 --- /dev/null +++ b/ubifs-utils/common/rwsem.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __LINUX_RWSEM_H_ +#define __LINUX_RWSEM_H_ + +#include <pthread.h> + +struct rw_semaphore { + pthread_mutex_t lock; +}; + +#define init_rwsem(x) pthread_mutex_init(&(x)->lock, NULL) + +#define down_read(x) pthread_mutex_lock(&(x)->lock) +#define down_write(x) pthread_mutex_lock(&(x)->lock) +#define up_read(x) pthread_mutex_unlock(&(x)->lock) +#define up_write(x) pthread_mutex_unlock(&(x)->lock) +#define down_write_trylock(x) (pthread_mutex_trylock(&(x)->lock) == 0) + +#endif |