Working

bertos/fs/fatfs/option/syncobj.c

@@ -0,0 +1,115 @@
+/*------------------------------------------------------------------------*/
+/* Sample code of OS dependent synchronization object controls            */
+/* for FatFs R0.07a  (C)ChaN, 2009                                        */
+/*------------------------------------------------------------------------*/
+
+#include <windows.h>	// Win32
+//#include <ucos_ii.h>	// uC/OS-II
+
+#include "../ff.h"
+
+#if _FS_REENTRANT
+
+/*------------------------------------------------------------------------*/
+/* Create a Synchronization Object for a Volume
+/*------------------------------------------------------------------------*/
+/* 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.
+*/
+
+BOOL ff_cre_syncobj (	/* TRUE:Function succeeded, FALSE:Could not create due to any error */
+	BYTE vol,			/* Corresponding logical drive being processed */
+	_SYNC_t *sobj		/* Pointer to return the created sync object */
+)
+{
+	BOOL ret;
+
+	*sobj = CreateMutex(NULL, FALSE, NULL);					// Win32
+	ret = (*sobj != INVALID_HANDLE_VALUE) ? TRUE : FALSE;	//
+
+//	*sobj = VolumeSemId[vol];	// uITRON (give a static created sync object)
+//	ret = TRUE;					// The initial value of the semaphore must be 1.
+
+//	*sobj = OSMutexCreate(0, &err);				// uC/OS-II
+//	ret = (err == OS_NO_ERR) ? TRUE : FALSE;	//
+
+	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.
+*/
+
+BOOL ff_del_syncobj (	/* TRUE:Function succeeded, FALSE:Could not delete due to any error */
+	_SYNC_t sobj		/* Sync object tied to the logical drive to be deleted */
+)
+{
+	BOOL ret;
+
+	ret = CloseHandle(sobj);	// Win32
+
+//	ret = TRUE;					// uITRON (nothing to do)
+
+//	OSMutexDel(sobj, OS_DEL_ALWAYS, &err);		// uC/OS-II
+//	ret = (err == OS_NO_ERR) ? TRUE : FALSE;	//
+
+	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.
+*/
+
+BOOL ff_req_grant (	/* TRUE:Got a grant to access the volume, FALSE:Could not get a grant */
+	_SYNC_t sobj	/* Sync object to wait */
+)
+{
+	BOOL ret;
+
+	ret = (WaitForSingleObject(sobj, _TIMEOUT) == WAIT_OBJECT_0) ? TRUE : FALSE;	// Win32
+
+//	ret = (wai_sem(sobj) == E_OK) ? TRUE : FALSE;	// uITRON
+
+//	OSMutexPend(sobj, _TIMEOUT, &err));				// uC/OS-II
+//	ret = (err == OS_NO_ERR) ? TRUE : FALSE;		//
+
+	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
+}
+
+
+#else
+
+#error This file is not needed in this configuration.
+
+#endif