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/*------------------------------------------------------------------------*/
/* Sample code of OS dependent controls for FatFs */
/* (C)ChaN, 2014 */
/* Portions COPYRIGHT 2017 STMicroelectronics */
/* Portions Copyright (C) 2014, ChaN, all right reserved */
/*------------------------------------------------------------------------*/
/**
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics. All rights reserved.
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
**/
#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 ( /* 1:Function succeeded, 0:Could not create the sync object */
BYTE vol, /* Corresponding volume (logical drive number) */
_SYNC_t *sobj /* Pointer to return the created sync object */
)
{
int ret;
#if _USE_MUTEX
#if (osCMSIS < 0x20000U)
osMutexDef(MTX);
*sobj = osMutexCreate(osMutex(MTX));
#else
*sobj = osMutexNew(NULL);
#endif
#else
#if (osCMSIS < 0x20000U)
osSemaphoreDef(SEM);
*sobj = osSemaphoreCreate(osSemaphore(SEM), 1);
#else
*sobj = osSemaphoreNew(1, 1, NULL);
#endif
#endif
ret = (*sobj != NULL);
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 */
_SYNC_t sobj /* Sync object tied to the logical drive to be deleted */
)
{
#if _USE_MUTEX
osMutexDelete (sobj);
#else
osSemaphoreDelete (sobj);
#endif
return 1;
}
/*------------------------------------------------------------------------*/
/* 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 = 0;
#if (osCMSIS < 0x20000U)
#if _USE_MUTEX
if(osMutexWait(sobj, _FS_TIMEOUT) == osOK)
#else
if(osSemaphoreWait(sobj, _FS_TIMEOUT) == osOK)
#endif
#else
#if _USE_MUTEX
if(osMutexAcquire(sobj, _FS_TIMEOUT) == osOK)
#else
if(osSemaphoreAcquire(sobj, _FS_TIMEOUT) == osOK)
#endif
#endif
{
ret = 1;
}
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 */
)
{
#if _USE_MUTEX
osMutexRelease(sobj);
#else
osSemaphoreRelease(sobj);
#endif
}
#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 ff_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 */
)
{
ff_free(mblock); /* Discard the memory block with POSIX API */
}
#endif
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