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+/*------------------------------------------------------------------------*/
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+/* Sample code of OS dependent controls for FatFs */
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+/* (C)ChaN, 2014 */
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+/* Portions COPYRIGHT 2017 STMicroelectronics */
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+/* Portions Copyright (C) 2014, ChaN, all right reserved */
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+/*------------------------------------------------------------------------*/
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+
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+/**
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+ ******************************************************************************
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+ *
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+ * <h2><center>© Copyright (c) 2017 STMicroelectronics International N.V.
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+ * All rights reserved.</center></h2>
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+ *
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+ * Redistribution and use in source and binary forms, with or without
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+ * modification, are permitted, provided that the following conditions are met:
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+ *
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+ * 1. Redistribution of source code must retain the above copyright notice,
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+ * this list of conditions and the following disclaimer.
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+ * 2. Redistributions in binary form must reproduce the above copyright notice,
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+ * this list of conditions and the following disclaimer in the documentation
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+ * and/or other materials provided with the distribution.
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+ * 3. Neither the name of STMicroelectronics nor the names of other
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+ * contributors to this software may be used to endorse or promote products
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+ * derived from this software without specific written permission.
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+ * 4. This software, including modifications and/or derivative works of this
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+ * software, must execute solely and exclusively on microcontroller or
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+ * microprocessor devices manufactured by or for STMicroelectronics.
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+ * 5. Redistribution and use of this software other than as permitted under
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+ * this license is void and will automatically terminate your rights under
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+ * this license.
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+ *
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+ * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS"
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+ * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT
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+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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+ * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
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+ * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT
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+ * SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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+ *
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+ ******************************************************************************
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+ */
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+
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+
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+
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+#include "../ff.h"
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+
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+
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+#if _FS_REENTRANT
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+/*------------------------------------------------------------------------*/
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+/* Create a Synchronization Object */
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+/*------------------------------------------------------------------------*/
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+/* This function is called in f_mount() function to create a new
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+/ synchronization object, such as semaphore and mutex. When a 0 is returned,
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+/ the f_mount() function fails with FR_INT_ERR.
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+*/
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+
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+int ff_cre_syncobj ( /* 1:Function succeeded, 0:Could not create the sync object */
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+ BYTE vol, /* Corresponding volume (logical drive number) */
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+ _SYNC_t *sobj /* Pointer to return the created sync object */
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+)
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+{
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+
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+ int ret;
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+
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+ osSemaphoreDef(SEM);
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+ *sobj = osSemaphoreCreate(osSemaphore(SEM), 1);
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+ ret = (*sobj != NULL);
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+
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+ return ret;
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+}
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+
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+
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+
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+/*------------------------------------------------------------------------*/
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+/* Delete a Synchronization Object */
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+/*------------------------------------------------------------------------*/
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+/* This function is called in f_mount() function to delete a synchronization
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+/ object that created with ff_cre_syncobj() function. When a 0 is returned,
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+/ the f_mount() function fails with FR_INT_ERR.
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+*/
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+
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+int ff_del_syncobj ( /* 1:Function succeeded, 0:Could not delete due to any error */
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+ _SYNC_t sobj /* Sync object tied to the logical drive to be deleted */
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+)
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+{
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+ osSemaphoreDelete (sobj);
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+ return 1;
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+}
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+
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+
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+
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+/*------------------------------------------------------------------------*/
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+/* Request Grant to Access the Volume */
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+/*------------------------------------------------------------------------*/
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+/* This function is called on entering file functions to lock the volume.
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+/ When a 0 is returned, the file function fails with FR_TIMEOUT.
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+*/
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+
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+int ff_req_grant ( /* 1:Got a grant to access the volume, 0:Could not get a grant */
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+ _SYNC_t sobj /* Sync object to wait */
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+)
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+{
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+ int ret = 0;
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+
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+ if(osSemaphoreWait(sobj, _FS_TIMEOUT) == osOK)
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+ {
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+ ret = 1;
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+ }
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+
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+ return ret;
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+}
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+
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+
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+
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+/*------------------------------------------------------------------------*/
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+/* Release Grant to Access the Volume */
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+/*------------------------------------------------------------------------*/
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+/* This function is called on leaving file functions to unlock the volume.
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+*/
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+
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+void ff_rel_grant (
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+ _SYNC_t sobj /* Sync object to be signaled */
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+)
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+{
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+ osSemaphoreRelease(sobj);
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+}
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+
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+#endif
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+
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+
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+
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+
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+#if _USE_LFN == 3 /* LFN with a working buffer on the heap */
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+/*------------------------------------------------------------------------*/
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+/* Allocate a memory block */
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+/*------------------------------------------------------------------------*/
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+/* If a NULL is returned, the file function fails with FR_NOT_ENOUGH_CORE.
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+*/
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+
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+void* ff_memalloc ( /* Returns pointer to the allocated memory block */
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+ UINT msize /* Number of bytes to allocate */
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+)
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+{
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+ return ff_malloc(msize); /* Allocate a new memory block with POSIX API */
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+}
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+
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+
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+/*------------------------------------------------------------------------*/
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+/* Free a memory block */
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+/*------------------------------------------------------------------------*/
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+
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+void ff_memfree (
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+ void* mblock /* Pointer to the memory block to free */
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+)
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+{
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+ ff_free(mblock); /* Discard the memory block with POSIX API */
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+}
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+
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+#endif
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