--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/fatfs/option/syscall.c	Wed Apr 03 23:34:20 2013 +1030
@@ -0,0 +1,155 @@
+/*------------------------------------------------------------------------*/
+/* Sample code of OS dependent controls for FatFs                         */
+/* (C)ChaN, 2012                                                          */
+/*------------------------------------------------------------------------*/
+
+#include <stdlib.h>		/* ANSI memory controls */
+#include <malloc.h>		/* ANSI memory controls */
+
+#include "../ff.h"
+
+
+#if _FS_REENTRANT
+/*------------------------------------------------------------------------*/
+/* Create a Synchronization Object
+/*------------------------------------------------------------------------*/
+/* This function is called in f_mount function to create a new
+/  synchronization object, such as semaphore and mutex. When a FALSE is
+/  returned, the f_mount function fails with FR_INT_ERR.
+*/
+
+int ff_cre_syncobj (	/* 1:Function succeeded, 0:Could not create due to any error */
+	BYTE vol,			/* Corresponding logical drive being processed */
+	_SYNC_t *sobj		/* Pointer to return the created sync object */
+)
+{
+	int ret;
+//	static _SYNC_t sem[_VOLUMES];	/* FreeRTOS */
+
+
+	*sobj = CreateMutex(NULL, FALSE, NULL);		/* Win32 */
+	ret = (*sobj != INVALID_HANDLE_VALUE);
+
+//	*sobj = SyncObjects[vol];		/* uITRON (give a static created sync object) */
+//	ret = 1;						/* The initial value of the semaphore must be 1. */
+
+//	*sobj = OSMutexCreate(0, &err);	/* uC/OS-II */
+//	ret = (err == OS_NO_ERR);
+
+//  if (!sem[vol])					/* FreeRTOS */
+//		sem[vol] = xSemaphoreCreateMutex();
+//	*sobj = sem[vol];
+//	ret = (*sobj != NULL);
+
+	return ret;
+}
+
+
+
+/*------------------------------------------------------------------------*/
+/* Delete a Synchronization Object                                        */
+/*------------------------------------------------------------------------*/
+/* This function is called in f_mount function to delete a synchronization
+/  object that created with ff_cre_syncobj function. When a FALSE is
+/  returned, the f_mount function fails with FR_INT_ERR.
+*/
+
+int ff_del_syncobj (	/* 1:Function succeeded, 0:Could not delete due to any error */
+	_SYNC_t sobj		/* Sync object tied to the logical drive to be deleted */
+)
+{
+	int ret;
+
+
+	ret = CloseHandle(sobj);	/* Win32 */
+
+//	ret = 1;					/* uITRON (nothing to do) */
+
+//	OSMutexDel(sobj, OS_DEL_ALWAYS, &err);	/* uC/OS-II */
+//	ret = (err == OS_NO_ERR);
+
+//	ret = 1;					/* FreeRTOS (nothing to do) */
+
+	return ret;
+}
+
+
+
+/*------------------------------------------------------------------------*/
+/* Request Grant to Access the Volume                                     */
+/*------------------------------------------------------------------------*/
+/* This function is called on entering file functions to lock the volume.
+/  When a FALSE is returned, the file function fails with FR_TIMEOUT.
+*/
+
+int ff_req_grant (	/* TRUE:Got a grant to access the volume, FALSE:Could not get a grant */
+	_SYNC_t sobj	/* Sync object to wait */
+)
+{
+	int ret;
+
+	ret = (WaitForSingleObject(sobj, _FS_TIMEOUT) == WAIT_OBJECT_0);	/* Win32 */
+
+//	ret = (wai_sem(sobj) == E_OK);				/* uITRON */
+
+//	OSMutexPend(sobj, _FS_TIMEOUT, &err));		/* uC/OS-II */
+//	ret = (err == OS_NO_ERR);
+
+//	ret = (xSemaphoreTake(sobj, _FS_TIMEOUT) == pdTRUE);	/* FreeRTOS */
+
+	return ret;
+}
+
+
+
+/*------------------------------------------------------------------------*/
+/* Release Grant to Access the Volume                                     */
+/*------------------------------------------------------------------------*/
+/* This function is called on leaving file functions to unlock the volume.
+*/
+
+void ff_rel_grant (
+	_SYNC_t sobj	/* Sync object to be signaled */
+)
+{
+	ReleaseMutex(sobj);		/* Win32 */
+
+//	sig_sem(sobj);			/* uITRON */
+
+//	OSMutexPost(sobj);		/* uC/OS-II */
+
+//	xSemaphoreGive(sobj);	/* FreeRTOS */
+}
+
+#endif
+
+
+
+
+#if _USE_LFN == 3	/* LFN with a working buffer on the heap */
+/*------------------------------------------------------------------------*/
+/* Allocate a memory block                                                */
+/*------------------------------------------------------------------------*/
+/* If a NULL is returned, the file function fails with FR_NOT_ENOUGH_CORE.
+*/
+
+void* ff_memalloc (	/* Returns pointer to the allocated memory block */
+	UINT msize		/* Number of bytes to allocate */
+)
+{
+	return malloc(msize);
+}
+
+
+/*------------------------------------------------------------------------*/
+/* Free a memory block                                                    */
+/*------------------------------------------------------------------------*/
+
+void ff_memfree (
+	void* mblock	/* Pointer to the memory block to free */
+)
+{
+	free(mblock);
+}
+
+#endif