From 8f78b1199f814ad18e1902edf8d9fbf23b05b4d3 Mon Sep 17 00:00:00 2001
From: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
Date: Mon, 5 Jun 2023 16:00:49 +0800
Subject: [PATCH 02/10] external/fio: add os-nuttx support

Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
---
 os/os-nuttx.h | 39 +++++++++++++++++++++++++++++++++++++++
 os/os.h       |  3 +++
 2 files changed, 42 insertions(+)
 create mode 100644 os/os-nuttx.h

diff --git fio/os/os-nuttx.h fio/os/os-nuttx.h
new file mode 100644
index 00000000..c81ea32c
--- /dev/null
+++ fio/os/os-nuttx.h
@@ -0,0 +1,39 @@
+#ifndef FIO_OS_NUTTX_H
+#define FIO_OS_NUTTX_H
+
+#include <errno.h>
+#include <malloc.h>
+#include <sys/mman.h>
+#include <sys/ioctl.h>
+
+#include <nuttx/fs/ioctl.h>
+
+#include "../file.h"
+
+#define FIO_OS os_nuttx
+#define OS_MAP_ANON MAP_ANON
+
+#define fio_swap16(x) bswap16(x)
+#define fio_swap32(x) bswap32(x)
+#define fio_swap64(x) bswap64(x)
+
+static inline unsigned long long os_phys_mem(void)
+{
+	struct mallinfo info;
+
+	info = mallinfo();
+	return (unsigned long long)info.arena;
+}
+
+static inline int blockdev_invalidate_cache(struct fio_file *f)
+{
+	return ioctl(f->fd, BIOC_FLUSH, 0);
+}
+
+static inline pid_t setsid(void)
+{
+	errno = ENOSYS;
+	return -1;
+}
+
+#endif
diff --git fio/os/os.h fio/os/os.h
index aba6813f..dddff7c1 100644
--- fio/os/os.h
+++ fio/os/os.h
@@ -24,6 +24,7 @@ enum {
 	os_windows,
 	os_android,
 	os_dragonfly,
+	os_nuttx,
 
 	os_nr,
 };
@@ -53,6 +54,8 @@ typedef enum {
 #include "os-windows.h"
 #elif defined (__DragonFly__)
 #include "os-dragonfly.h"
+#elif defined (__NuttX__)
+#include "os-nuttx.h"
 #else
 #error "unsupported os"
 #endif
-- 
2.34.1