source: azure_iot_hub_f767zi/trunk/asp_baseplatform/files/ff/option/syncobj.c@ 457

/*------------------------------------------------------------------------*/
/* Sample code of OS dependent synchronization object controls            */
/* for FatFs R0.07a  (C)ChaN, 2009                                        */
/*------------------------------------------------------------------------*/

//#include <windows.h>  // Win32
#include <kernel.h>
#include "kernel_cfg.h"
//#include <ucos_ii.h>  // uC/OS-II

#include "../ff.h"

#if _FS_REENTRANT

static const ID VolumeSemId[4] = {
        SEMID_FATFS1,
        SEMID_FATFS2,
        SEMID_FATFS3,
        SEMID_FATFS4
};

/*------------------------------------------------------------------------*/
/* 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