diff options
Diffstat (limited to 'cpukit/libfs/src/jffs2/include/linux/rwsem.h')
| -rw-r--r-- | cpukit/libfs/src/jffs2/include/linux/rwsem.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/cpukit/libfs/src/jffs2/include/linux/rwsem.h b/cpukit/libfs/src/jffs2/include/linux/rwsem.h new file mode 100644 index 0000000000..d648a150ca --- /dev/null +++ b/cpukit/libfs/src/jffs2/include/linux/rwsem.h @@ -0,0 +1,20 @@ +#ifndef __LINUX_RWSEM_H__ +#define __LINUX_RWSEM_H__ + +// eCos does not have the concept of a read/write semaphore. So just +// map them onto normal semaphores and hope we don't deadlock +// somewhere. + +#include <asm/semaphore.h> + +struct rw_semaphore; + +#define down_read(sem) cyg_drv_mutex_lock((cyg_drv_mutex_t *)sem) +#define down_read_trylock(sem) cyg_drv_mutex_trylock((cyg_drv_mutex_t *)sem) +#define down_write(sem) cyg_drv_mutex_lock((cyg_drv_mutex_t *)sem) +#define down_write_trylock(sem) cyg_drv_mutex_trylock((cyg_drv_mutex_t *)sem) +#define up_read(sem) cyg_drv_mutex_unlock((cyg_drv_mutex_t *)sem) +#define up_write(sem) cyg_drv_mutex_unlock((cyg_drv_mutex_t *)sem) +#define downgrade_write(sem) + +#endif // __LINUX_RWSEM_H__ |