patch-2.4.2 linux/include/asm-s390x/queue.h

• Lines: 171
• Date: Tue Feb 13 14:13:44 2001
• Orig file: v2.4.1/linux/include/asm-s390x/queue.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.1/linux/include/asm-s390x/queue.h linux/include/asm-s390x/queue.h
@@ -0,0 +1,170 @@
+/*
+ *  include/asm-s390/queue.h
+ *
+ *  S390 version
+ *    Copyright (C) 1999,2000 IBM Deutschland Entwicklung GmbH, IBM Corporation
+ *    Author(s): Denis Joseph Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
+ *
+ *  A little set of queue utilies.
+ */
+#include <linux/stddef.h>
+#include <asm/types.h>
+
+typedef struct queue
+{
+	struct queue *next;	
+} queue;
+
+typedef queue list;
+
+typedef struct
+{
+	queue *head;
+	queue *tail;
+} qheader;
+
+static __inline__ void init_queue(qheader *qhead)
+{
+	memset(qhead,0,sizeof(*qhead));
+}
+
+static __inline__ void enqueue_tail(qheader *qhead,queue *member)
+{
+	queue *tail=qhead->tail;
+	member->next=NULL;
+	
+	if(member)
+	{
+		if(tail)
+			tail->next=member;
+		else
+			
+			qhead->head=member;
+		qhead->tail=member;
+		member->next=NULL;
+	}
+} 
+
+static __inline__ queue *dequeue_head(qheader *qhead)
+{
+	queue *head=qhead->head,*next_head;
+
+	if(head)
+	{
+		next_head=head->next;
+		qhead->head=next_head;
+	        if(!next_head)
+			qhead->tail=NULL;
+	}
+	return(head);
+}
+
+static __inline__ void init_list(list **lhead)
+{
+	*lhead=NULL;
+}
+
+static __inline__ void add_to_list(list **lhead,list *member)
+{
+	member->next=*lhead;
+	*lhead=member;
+}
+
+static __inline__ list *remove_listhead(list **lhead)
+{
+	list *oldhead=*lhead;
+
+	if(oldhead)
+		*lhead=(*lhead)->next;
+	return(oldhead);
+}
+
+static __inline__ void add_to_list_tail(list **lhead,list *member)
+{
+	list *curr,*prev;
+	if(*lhead==NULL)
+		*lhead=member;
+	else
+	{
+		prev=*lhead;
+		for(curr=(*lhead)->next;curr!=NULL;curr=curr->next)
+			prev=curr;
+		prev->next=member;
+	}
+}
+static __inline__ void add_to_list_tail_null(list **lhead,list *member)
+{
+	member->next=NULL;
+	add_to_list_tail_null(lhead,member);
+}
+
+
+static __inline__ int is_in_list(list *lhead,list *member)
+{
+	list *curr;
+
+	for(curr=lhead;curr!=NULL;curr=curr->next)
+		if(curr==member)
+			return(TRUE);
+	return(FALSE);
+}
+
+static __inline__ int get_prev(list *lhead,list *member,list **prev)
+{
+	list *curr;
+
+	*prev=NULL;
+	for(curr=lhead;curr!=NULL;curr=curr->next)
+	{
+		if(curr==member)
+			return(TRUE);
+		*prev=curr;
+	}
+	*prev=NULL;
+	return(FALSE);
+}
+
+
+
+static __inline__ int remove_from_list(list **lhead,list *member)
+{
+	list *prev;
+
+	if(get_prev(*lhead,member,&prev))
+	{
+
+		if(prev)
+			prev->next=member->next;
+		else
+			*lhead=member->next;
+		return(TRUE);
+	}
+	return(FALSE);
+}
+
+static __inline__ int remove_from_queue(qheader *qhead,queue *member)
+{
+	queue *prev;
+
+	if(get_prev(qhead->head,(list *)member,(list **)&prev))
+	{
+
+		if(prev)
+		{
+			prev->next=member->next;
+			if(prev->next==NULL)
+				qhead->tail=prev;
+		}
+		else
+		{
+			if(qhead->head==qhead->tail)
+				qhead->tail=NULL;
+			qhead->head=member->next;
+		}
+		return(TRUE);
+	}
+	return(FALSE);
+}
+
+
+