152 lines
4.6 KiB
C
152 lines
4.6 KiB
C
/*------------------------------------------------------------------------*/
|
|
/* Sample code of OS dependent controls for FatFs */
|
|
/* (C)ChaN, 2014 */
|
|
/*------------------------------------------------------------------------*/
|
|
|
|
|
|
#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 ( /* !=0:Function succeeded, ==0:Could not create due to any error */
|
|
BYTE vol, /* Corresponding logical drive being processed */
|
|
_SYNC_t *sobj /* Pointer to return the created sync object */
|
|
)
|
|
{
|
|
int ret;
|
|
|
|
|
|
*sobj = CreateMutex(NULL, FALSE, NULL); /* Win32 */
|
|
ret = (int)(*sobj != INVALID_HANDLE_VALUE);
|
|
|
|
// *sobj = SyncObjects[vol]; /* uITRON (give a static created sync object) */
|
|
// ret = 1; /* The initial value of the semaphore must be 1. */
|
|
|
|
// *sobj = OSMutexCreate(0, &err); /* uC/OS-II */
|
|
// ret = (int)(err == OS_NO_ERR);
|
|
|
|
// *sobj = xSemaphoreCreateMutex(); /* FreeRTOS */
|
|
// ret = (int)(*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 ( /* !=0:Function succeeded, ==0:Could not delete due to any error */
|
|
_SYNC_t sobj /* Sync object tied to the logical drive to be deleted */
|
|
)
|
|
{
|
|
int ret;
|
|
|
|
|
|
ret = CloseHandle(sobj); /* Win32 */
|
|
|
|
// ret = 1; /* uITRON (nothing to do) */
|
|
|
|
// OSMutexDel(sobj, OS_DEL_ALWAYS, &err); /* uC/OS-II */
|
|
// ret = (int)(err == OS_NO_ERR);
|
|
|
|
// vSemaphoreDelete(sobj); /* FreeRTOS */
|
|
// ret = 1;
|
|
|
|
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 */
|
|
_SYNC_t sobj /* Sync object to wait */
|
|
)
|
|
{
|
|
int ret;
|
|
|
|
ret = (int)(WaitForSingleObject(sobj, _FS_TIMEOUT) == WAIT_OBJECT_0); /* Win32 */
|
|
|
|
// ret = (int)(wai_sem(sobj) == E_OK); /* uITRON */
|
|
|
|
// OSMutexPend(sobj, _FS_TIMEOUT, &err)); /* uC/OS-II */
|
|
// ret = (int)(err == OS_NO_ERR);
|
|
|
|
// ret = (int)(xSemaphoreTake(sobj, _FS_TIMEOUT) == pdTRUE); /* 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 msize /* Number of bytes to allocate */
|
|
)
|
|
{
|
|
return 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 */
|
|
)
|
|
{
|
|
free(mblock); /* Discard the memory block with POSIX API */
|
|
}
|
|
|
|
#endif
|