/*------------------------------------------------------------------------*/
/* Sample code of OS dependent controls for FatFs                         */
/* (C)ChaN, 2014                                                          */
/*------------------------------------------------------------------------*/

#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 0 is returned,
/  the f_mount() function fails with FR_INT_ERR.
*/

int ff_cre_syncobj (	/* !=0: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;
    OS_ERR err;
	OSMutexCreate(sobj, "fatfs_mutex", &err);		/* uC/OS-III */
	ret = (int)(err == OS_ERR_NONE);
	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 0 is returned,
/  the f_mount() function fails with FR_INT_ERR.
*/

int ff_del_syncobj (	/* !=0: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;
    OS_ERR err;
	OSMutexDel(&sobj, OS_OPT_DEL_ALWAYS, &err);	/* uC/OS-III */
	ret = (int)(err == OS_ERR_NONE);
	return ret;
}



/*------------------------------------------------------------------------*/
/* Request Grant to Access the Volume                                     */
/*------------------------------------------------------------------------*/
/* This function is called on entering file functions to lock the volume.
/  When a 0 is returned, the file function fails with FR_TIMEOUT.
*/

int ff_req_grant (	/* 1:Got a grant to access the volume, 0:Could not get a grant */
	_SYNC_t sobj	/* Sync object to wait */
)
{
	int ret;
    OS_ERR err;
    
	OSMutexPend(&sobj, _FS_TIMEOUT, OS_OPT_PEND_BLOCKING, (CPU_TS *)0, &err);		/* uC/OS-III */
	ret = (int)(err == OS_ERR_NONE);
	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 */
)
{
    OS_ERR err;
	OSMutexPost(&sobj, OS_OPT_POST_NONE, &err);		/* uC/OS-III */
}

#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);	/* Allocate a new memory block with POSIX API */
}


/*------------------------------------------------------------------------*/
/* Free a memory block                                                    */
/*------------------------------------------------------------------------*/
void ff_memfree (
	void* mblock	/* Pointer to the memory block to free */
)
{
	free(mblock);	/* Discard the memory block with POSIX API */
}

#endif
