#include <ucos_ii.h>
#include <includes.h>
#include "ff.h"

#if FF_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 0 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 */
	FF_SYNC_t *sobj		/* Pointer to return the created sync object */
)
{
	int ret;
    CPU_INT08U  err;

	*sobj = OSMutexCreate(0, &err);				// uC/OS-II
	ret = (err == OS_ERR_NONE) ? 1 : 0;	//

	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 (	/* 1:Function succeeded, 0:Could not delete due to any error */
	FF_SYNC_t sobj		/* Sync object tied to the logical drive to be deleted */
)
{
	int ret;
    CPU_INT08U  err;
    
	OSMutexDel(sobj, OS_DEL_ALWAYS, &err);		// uC/OS-II
	ret = (err == OS_ERR_NONE) ? 1 : 0;	//

	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 */
	FF_SYNC_t sobj	/* Sync object to wait */
)
{
	int ret;
    CPU_INT08U  err;

	OSMutexPend(sobj, FF_FS_TIMEOUT, &err);				// uC/OS-II
	ret = (err == OS_ERR_NONE) ? 1 : 0;		//

	return ret;
}



/*------------------------------------------------------------------------*/
/* Release Grant to Access the Volume                                     */
/*------------------------------------------------------------------------*/
/* This function is called on leaving file functions to unlock the volume.
*/

void ff_rel_grant (
	FF_SYNC_t sobj	/* Sync object to be signaled */
)
{
	OSMutexPost(sobj);	// uC/OS-II
}


#else

#error This file is not needed in this configuration.

#endif
