original files of m241

2026-07-30 11:19:44 +05:30
parent 170c2b3f3a
commit afc7070c1f
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+/* usbListLib.h - Linked list utility functions */
+
+/* Copyright 2000, 2010 Wind River Systems, Inc. */
+
+/*
+Modification history
+--------------------
+01b,29apr10,pad  Moved extern C statement after include statements.
+01a,10jun99,rcb  First.
+*/
+
+/*
+DESCRIPTION
+
+This file defines a set of general-purpose linked-list functions which are
+portable across OS's.
+*/
+
+#ifndef __INCusbListLibh
+#define __INCusbListLibh
+
+
+/* includes */
+
+#include "usb/ossLib.h"
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+
+/* defines */
+
+/* Arguments passed to the usbListLink/usbListLinkProt utility function. */
+
+#define LINK_HEAD   0
+#define LINK_TAIL   1
+
+/* Arguments passed to the usbListFind utility function. */
+
+#define LINK_TEST   0
+#define LINK_REMOVE 1
+
+/* typedefs */
+
+/*
+ * LINK
+ * 
+ * Linked-list management structure. 
+ *
+ * NOTE: Code relies on the fact that LINK.linkFwd and LIST_HEAD.pLink are 
+ * both the first fields in their respective structures.
+ */
+
+typedef struct link 
+    {
+    struct link *linkFwd;	/* Link to next entry */
+    struct link *linkBack;	/* Link to previous entry */
+    pVOID pStruct;		/* Points to base of structure being linked */
+    } LINK, *pLINK;
+
+/*
+ * LIST_HEAD
+ *
+ * Defines the head of a linked list.
+ */
+
+typedef struct list_head
+    {
+    pLINK pLink;		/* Pointer to first entry on list */
+    } LIST_HEAD, *pLIST_HEAD;
+    
+
+/* Function prototypes. */
+
+VOID usbListLink 
+    (
+    pLIST_HEAD pHead,		/* list head */
+    pVOID pStruct,		/* ptr to base of structure to be linked */
+    pLINK pLink,		/* ptr to LINK structure to be linked */
+    UINT16 flag 		/* indicates LINK_HEAD or LINK_TAIL */
+    );
+
+VOID usbListLinkProt 
+    (
+    pLIST_HEAD pHead,		/* list head */
+    pVOID pStruct,		/* ptr to base of structure to be linked */
+    pLINK pLink,		/* ptr to LINK structure to be linked */
+    UINT16 flag,		/* indicates LINK_HEAD or LINK_TAIL */
+    MUTEX_HANDLE mutex		/* list guard mutex */
+    );
+    
+
+VOID usbListUnlink 
+    (
+    pLINK pLink 		/* LINK structure to be unlinked */
+    );
+
+VOID usbListUnlinkProt
+    (
+    pLINK pLink,		/* LINK structure to be unlinked */
+    MUTEX_HANDLE mutex		/* list guard mutex */
+    );
+
+pVOID usbListFirst
+    (
+    pLIST_HEAD pListHead	/* head of linked list */
+    );
+
+pVOID usbListNext
+    (
+    pLINK pLink 		/* LINK structure */
+    );
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* __INCusbListLibh */
+
+/* End of file. */
+