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jerpelea pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/nuttx.git
The following commit(s) were added to refs/heads/master by this push:
new dfc70b1ddb libc/stdio: Implement lib_get_stream
dfc70b1ddb is described below
commit dfc70b1ddb25d776ad8ed7660ffee416fefd6602
Author: Huang Qi <huang...@xiaomi.com>
AuthorDate: Thu Mar 2 12:53:29 2023 +0800
libc/stdio: Implement lib_get_stream
Use lib_get_stream() to fetch stdin/stdout/stderr,
since is more easy to works with other language by function call
than export native C structure memory layout.
Signed-off-by: Huang Qi <huang...@xiaomi.com>
---
include/nuttx/lib/lib.h | 1 +
include/stdio.h | 6 +++---
libs/libc/stdio/lib_libgetstreams.c | 14 ++++++++++++++
3 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/include/nuttx/lib/lib.h b/include/nuttx/lib/lib.h
index df30581f87..df71eb988e 100644
--- a/include/nuttx/lib/lib.h
+++ b/include/nuttx/lib/lib.h
@@ -111,6 +111,7 @@ void lib_stream_release(FAR struct task_group_s *group);
/* Functions contained in lib_getstreams.c **********************************/
FAR struct streamlist *lib_get_streams(void);
+FAR struct file_struct *lib_get_stream(int fd);
#endif /* CONFIG_FILE_STREAM */
/* Functions defined in lib_srand.c *****************************************/
diff --git a/include/stdio.h b/include/stdio.h
index ebcfe1b430..854f8ce043 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -63,9 +63,9 @@
/* The first three _iob entries are reserved for standard I/O */
-#define stdin (&lib_get_streams()->sl_std[0])
-#define stdout (&lib_get_streams()->sl_std[1])
-#define stderr (&lib_get_streams()->sl_std[2])
+#define stdin lib_get_stream(0)
+#define stdout lib_get_stream(1)
+#define stderr lib_get_stream(2)
/* Path to the directory where temporary files can be created */
diff --git a/libs/libc/stdio/lib_libgetstreams.c
b/libs/libc/stdio/lib_libgetstreams.c
index 3c31ecae1a..cb3025f60a 100644
--- a/libs/libc/stdio/lib_libgetstreams.c
+++ b/libs/libc/stdio/lib_libgetstreams.c
@@ -57,4 +57,18 @@ FAR struct streamlist *lib_get_streams(void)
return &info->ta_streamlist;
}
+/****************************************************************************
+ * Name: lib_get_stream
+ *
+ * Description:
+ * Return a pointer to the file stream for this thread and given fd。
+ * Note: only reserved fd number 0/1/2 is valid.
+ *
+ ****************************************************************************/
+
+FAR struct file_struct *lib_get_stream(int fd)
+{
+ return &lib_get_streams()->sl_std[fd];
+}
+
#endif /* CONFIG_FILE_STREAM */
