/*------------------------------------------------------------------------*/
/* Sample code of OS dependent controls for FatFs R0.08                   */
/* (C)ChaN, 2010                                                          */
/*------------------------------------------------------------------------*/

#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.
*/

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 = SyncObjects[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;

//  *sobj = xSemaphoreCreateMutex();            /* FreeRTOS */
//  ret = (*sobj != NULL) ? 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;

//  ret = TRUE;                 /* 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.
*/

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, _FS_TIMEOUT) == WAIT_OBJECT_0) ? TRUE : FALSE; /* Win32 */

//  ret = (wai_sem(sobj) == E_OK) ? TRUE : FALSE;   /* uITRON */

//  OSMutexPend(sobj, _FS_TIMEOUT, &err));          /* uC/OS-II */
//  ret = (err == OS_NO_ERR) ? TRUE : FALSE;

//  ret = (xSemaphoreTake(sobj, _FS_TIMEOUT) == pdTRUE) ? TRUE : FALSE; /* 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 size       /* Number of bytes to allocate */
)
{
    return malloc(size);
}


/*------------------------------------------------------------------------*/
/* Free a memory block                                                    */
/*------------------------------------------------------------------------*/

void ff_memfree(
    void* mblock    /* Pointer to the memory block to free */
)
{
    free(mblock);
}

#endif
