added gfileSync() and autosync feature

docs/releases.txt

@@ -9,6 +9,7 @@ FEATURE:	Added generic framebuffer driver
 FEATURE:	Added Linux-Framebuffer board definition
 FEATURE:	Added FatFS support for GFILE
 FEATURE:	Added gfileMount() and gfileUnmount()
+FEATURE:	Added gfileSync()
 
 
 *** Release 2.1 ***

gfxconf.example.h

@@ -220,6 +220,7 @@
 //    #define GFILE_ALLOW_DEVICESPECIFIC               FALSE
 //    #define GFILE_MAX_GFILES                         3
 //#define GFILE_NEED_NOAUTOMOUNT                       FALSE
+//#define GFILE_NEED_NOAUTOSYNC                        FALSE
 
 //#define GFILE_NEED_MEMFS                             FALSE
 //#define GFILE_NEED_ROMFS                             FALSE

src/gfile/gfile.c

@@ -58,6 +58,7 @@ typedef struct GFILEVMT {
 	bool_t		(*eof)		(GFILE *f);
 	bool_t		(*mount)	(const char *drive);
 	bool_t		(*unmount)	(const char *drive);
+	bool_t		(*sync)		(GFILE *f);
 } GFILEVMT;
 
 // The chain of FileSystems
@@ -505,6 +506,12 @@ bool_t gfileUnmount(char fs, const char* drive) {
 	return FALSE;
 }
 
+bool_t gfileSync(GFILE *f) {
+	if (!f->vmt->sync)
+		return FALSE;
+	return f->vmt->sync(f);
+}
+
 /********************************************************
  * String VMT routines
  ********************************************************/

src/gfile/inc_chibiosfs.c

@@ -27,7 +27,8 @@ static const GFILEVMT FsCHIBIOSVMT = {
 	0, 0, 0, 0,
 	0, ChibiOSBFSClose, ChibiOSBFSRead, ChibiOSBFSWrite,
 	ChibiOSBFSSetpos, ChibiOSBFSGetsize, ChibiOSBFSEof,
-	0, 0
+	0, 0,
+	0
 };
 
 static void ChibiOSBFSClose(GFILE *f) {

src/gfile/inc_fatfs.c

@@ -29,6 +29,7 @@ static long int fatfsGetSize(GFILE* f);
 static bool_t fatfsEOF(GFILE* f);
 static bool_t fatfsMount(const char* drive);
 static bool_t fatfsUnmount(const char* drive);
+static bool_t fatfsSync(GFILE* f);
 
 static const GFILEVMT FsFatFSVMT = {
 	GFILE_CHAINHEAD,
@@ -46,7 +47,8 @@ static const GFILEVMT FsFatFSVMT = {
 	fatfsGetSize,
 	fatfsEOF,
 	fatfsMount,
-	fatfsUnmount
+	fatfsUnmount,
+	fatfsSync
 };
 
 #undef GFILE_CHAINHEAD
@@ -140,6 +142,13 @@ static bool_t fatfsOpen(GFILE* f, const char* fname)
 
 	f->obj = (void*)fd;
 
+	#if !GFILE_NEED_NOAUTOSYNC
+		// no need to sync when not opening for write
+		if (f->flags & GFILEFLG_WRITE) {
+			f_sync( (FIL*)f->obj );
+		}
+	#endif
+
 	return TRUE;	
 }
 
@@ -165,6 +174,7 @@ static int fatfsWrite(GFILE* f, const void* buf, int size)
 	int wr;
 
 	f_write( (FIL*)f->obj, buf, size, (UINT*)&wr);
+	f_sync( (FIL*)f->obj );
 
 	return wr;
 }
@@ -221,3 +231,15 @@ static bool_t fatfsUnmount(const char* drive)
 	return FALSE;
 }
 
+static bool_t fatfsSync(GFILE *f)
+{
+	FRESULT ferr;
+
+	ferr = f_sync( (FIL*)f->obj );
+	if (ferr != FR_OK) {
+		return FALSE;
+	}
+
+	return TRUE;
+}
+

src/gfile/inc_memfs.c

@@ -26,7 +26,8 @@ static const GFILEVMT FsMemVMT = {
 	0, 0, 0, 0,
 	0, 0, MEMRead, MEMWrite,
 	MEMSetpos, 0, 0,
-	0, 0
+	0, 0, 
+	0
 };
 
 static int MEMRead(GFILE *f, void *buf, int size) {

src/gfile/inc_nativefs.c

@@ -46,7 +46,8 @@ static const GFILEVMT FsNativeVMT = {
 	NativeDel, NativeExists, NativeFilesize, NativeRen,
 	NativeOpen, NativeClose, NativeRead, NativeWrite,
 	NativeSetpos, NativeGetsize, NativeEof,
-	0, 0
+	0, 0,
+	0
 };
 #undef GFILE_CHAINHEAD
 #define GFILE_CHAINHEAD		&FsNativeVMT

src/gfile/inc_romfs.c

@@ -52,7 +52,8 @@ static const GFILEVMT FsROMVMT = {
 	0, ROMExists, ROMFilesize, 0,
 	ROMOpen, ROMClose, ROMRead, 0,
 	ROMSetpos, ROMGetsize, ROMEof,
-	0, 0
+	0, 0,
+	0
 };
 #undef GFILE_CHAINHEAD
 #define GFILE_CHAINHEAD		&FsROMVMT

src/gfile/sys_defs.h

@@ -226,6 +226,19 @@ extern "C" {
 	 */
 	bool_t gfileUnmount(char fs, const char *drive);
 
+	/**
+	 * @brief					Syncs the file object (flushes the buffer)
+	 *
+	 * @details					Not supported by every file system
+	 *
+	 * @param[in] f				The file
+	 *
+	 * @return					TRUE on success, FALSE otherwise
+	 *
+	 * @api
+	 */
+	bool_t gfileSync(GFILE *f);
+
 	#if GFILE_NEED_CHIBIOSFS && GFX_USE_OS_CHIBIOS
 		GFILE *		gfileOpenBaseFileStream(void *BaseFileStreamPtr, const char *mode);
 	#endif

src/gfile/sys_options.h

@@ -30,6 +30,19 @@
 	#ifndef GFILE_NEED_NOAUTOMOUNT
 		#define GFILE_NEED_NOAUTOMOUNT	FALSE
 	#endif
+	/**
+	 * @brief	Should the filesystem be synced automatically
+	 * @details	The filesystem will automatically be synced after an open() or
+	 *			write() call unless this feature is disabled.
+	 * @details	If this feature is disabled, the user should sync the filesystem
+	 *			himself using @p gfileSync()
+	 * @details	Not all filesystems implement the syncing feature. This feature will
+	 *			have no effect in such a case.
+	 * @details	Defaults to FALSE
+	 */
+	#ifndef GFILE_NEED_NOAUTOSYNC
+		#define GFILE_NEED_NOAUTOSYNC	FALSE
+	#endif
 	/**
 	 * @brief   Include printg, fprintg etc functions
 	 * @details	Defaults to FALSE