0576641cae
Also add `static` and remove `register` in mach/proto/top/top.c. A static function is only in one file, so its function declaration may go in that file, instead of a header file.
70 lines
1.2 KiB
C
70 lines
1.2 KiB
C
/* $Id$ */
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/*
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* (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
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* See the copyright notice in the ACK home directory, in the file "Copyright".
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*/
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#include "top.h"
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#include "queue.h"
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void empty_queue(queue q)
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{
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q->head = q->tail = (instr_p) 0;
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q->qlen = 0;
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}
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int empty(queue q)
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{
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return q->qlen == 0;
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}
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void remove_head(queue q)
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{
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if ( (q->head = q->head->fw) == (instr_p) 0) {
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q->tail = (instr_p) 0;
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} else {
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q->head->bw = (instr_p) 0;
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}
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q->qlen--;
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}
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void add(queue q, instr_p instr)
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{
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if (q->qlen++ == 0) {
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q->head = q->tail = instr;
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instr->bw = (instr_p) 0;
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} else {
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q->tail->fw = instr;
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instr->bw = q->tail;
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q->tail = instr;
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}
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instr->fw = (instr_p) 0;
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}
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void insert(queue q, instr_p instr)
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{
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if (q->qlen++ == 0) {
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q->head = q->tail = instr;
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instr->fw = (instr_p) 0;
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} else {
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q->head->bw = instr;
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instr->fw = q->head;
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q->head = instr;
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}
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instr->bw = (instr_p) 0;
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}
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void join_queues(queue q1, queue q2)
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{
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if (q1->qlen > 0) {
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q2->qlen += q1->qlen;
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q1->tail->fw = q2->head;
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if (q2->qlen > 0) {
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q2->head->bw = q1->tail;
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} else {
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q2->tail = q1->tail;
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}
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q2->head = q1->head;
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empty_queue(q1);
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}
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}
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