fix some -Wmissing-prototypes warnings

1 files changed, 5 insertions, 0 deletions

diff --git a/components/drivers/include/ipc/pipe.h b/components/drivers/include/ipc/pipe.h
index ddef3817df..94ac10f635 100644
--- a/components/drivers/include/ipc/pipe.h
+++ b/components/drivers/include/ipc/pipe.h
@@ -39,6 +39,11 @@ struct rt_pipe_device
 typedef struct rt_pipe_device rt_pipe_t;
 
 rt_pipe_t *rt_pipe_create(const char *name, int bufsz);
+rt_err_t rt_pipe_open(rt_device_t device, rt_uint16_t oflag);
+rt_ssize_t rt_pipe_read(rt_device_t device, rt_off_t pos, void *buffer, rt_size_t count);
+rt_ssize_t rt_pipe_write(rt_device_t device, rt_off_t pos, const void *buffer, rt_size_t count);
+rt_err_t rt_pipe_control(rt_device_t dev, int cmd, void *args);
+rt_err_t rt_pipe_close(rt_device_t device);
 int rt_pipe_delete(const char *name);
 
 #endif /* PIPE_H__ */