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Fixes to use lfs_filebd on windows platforms

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There are two issues, when using the file-based block device emulation
on Windows Platforms:
1. There is no fsync implementation available. This needs to be mapped
   to a Windows-specific FlushFileBuffers system call.
2. The block device file needs to be opened as binary file (O_BINARY)
	   The corresponding flag is not required for Linux.
This commit is contained in:
Martin Hoffmann
2022-02-13 20:07:17 +01:00
committed by Christopher Haster
parent 9c7e232086
commit 1e038c81fc
1 changed files with 13 additions and 0 deletions
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13
bd/lfs_filebd.c
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@@ -10,6 +10,10 @@
#include <unistd.h>
#include <errno.h>
#ifdef _WIN32
#include <windows.h>
#endif
int lfs_filebd_createcfg(const struct lfs_config *cfg, const char *path,
const struct lfs_filebd_config *bdcfg) {
LFS_FILEBD_TRACE("lfs_filebd_createcfg(%p {.context=%p, "
@@ -27,7 +31,12 @@ int lfs_filebd_createcfg(const struct lfs_config *cfg, const char *path,
bd->cfg = bdcfg;
// open file
#ifdef _WIN32
bd->fd = open(path, O_RDWR | O_CREAT | O_BINARY, 0666);
#else
bd->fd = open(path, O_RDWR | O_CREAT, 0666);
#endif
if (bd->fd < 0) {
int err = -errno;
LFS_FILEBD_TRACE("lfs_filebd_createcfg -> %d", err);
@@ -193,7 +202,11 @@ int lfs_filebd_sync(const struct lfs_config *cfg) {
LFS_FILEBD_TRACE("lfs_filebd_sync(%p)", (void*)cfg);
// file sync
lfs_filebd_t *bd = cfg->context;
#ifdef _WIN32
int err = FlushFileBuffers((HANDLE) _get_osfhandle(fd)) ? 0 : -1;
#else
int err = fsync(bd->fd);
#endif
if (err) {
err = -errno;
LFS_FILEBD_TRACE("lfs_filebd_sync -> %d", 0);