企業(yè)網(wǎng)站建設(shè) 總結(jié)網(wǎng)站開發(fā)菜鳥適合用什么軟件
鶴壁市浩天電氣有限公司
2026/01/24 11:09:52
企業(yè)網(wǎng)站建設(shè) 總結(jié),網(wǎng)站開發(fā)菜鳥適合用什么軟件,免費(fèi)發(fā)布推廣的網(wǎng)站,三端互通傳奇手游開服列表信號(hào)機(jī)制深入剖析 1. 信號(hào)隊(duì)列清理 1.1 清空信號(hào)隊(duì)列 在處理信號(hào)時(shí)，有時(shí)需要清空信號(hào)隊(duì)列。以下是清空信號(hào)隊(duì)列的代碼：
struct sigqueue *q, *n;
sigemptyset(queue-signal);
q = queue-head;
queue-head = NULL;
queue-tail = queue-hea…信號(hào)機(jī)制深入剖析1. 信號(hào)隊(duì)列清理1.1 清空信號(hào)隊(duì)列在處理信號(hào)時(shí)，有時(shí)需要清空信號(hào)隊(duì)列。以下是清空信號(hào)隊(duì)列的代碼：struct sigqueue *q, *n; sigemptyset(queue-signal); q = queue-head; queue-head = NULL; queue-tail = queue-head; while (q) { n = q-next; kmem_cache_free(sigqueue_cachep, q); atomic_dec(nr_queued_signals); q = n; }這段代碼的執(zhí)行步驟如下：1.清空信號(hào)位圖：sigemptyset(queue-signal)將信號(hào)位圖置零，表示沒有信號(hào)排隊(duì)。2.保存頭指針：q = queue-head保存隊(duì)列的頭指針，后續(xù)將使用該指針遍歷隊(duì)列。3.重置隊(duì)列狀態(tài)：queue-head = NULL和queue-tail = queue-head將隊(duì)列重置為初始狀態(tài)。4.遍歷隊(duì)列并釋放內(nèi)存