Diff: syscall.cpp

Revision:

4:f88948891a05

Child:

6:d770e6821de6

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/syscall.cpp	Tue Dec 11 23:49:02 2012 +0000
@@ -0,0 +1,112 @@
+//------------------------------------------------------------------------/
+// Sample code of OS dependent controls for FatFs                         /
+// (C)ChaN, 2012                                                          /
+//------------------------------------------------------------------------/
+
+#include "ff.h"
+#include "rtos.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 (    /* 1: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 */
+)
+{
+    (*sobj) = new Semaphore(0);
+
+    return 1;
+}
+
+
+
+/*------------------------------------------------------------------------*/
+/* 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 (    /* 1:Function succeeded, 0:Could not delete due to any error */
+    _SYNC_t sobj        /* Sync object tied to the logical drive to be deleted */
+)
+{
+    delete sobj;
+    return true;
+}
+
+
+
+/*------------------------------------------------------------------------*/
+/* 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 = (sobj->wait(_FS_TIMEOUT) > 0);
+
+    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 */
+)
+{
+    sobj->release();
+}
+
+#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