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我有一個消息隊列,我從中獲取消息循環。問題是我不知道如何退出循環。 msgrcv返回類型size_t,所以它繼續前進。我應該比較什麼值的返回值,所以我可以退出循環?IPC消息隊列。 msgrcv系統調用。系統V.如何走出循環
while(msgrcv(msqid, &msgreceived, sizeof(msgreceived), BUFFER_CHANGED, 0) != -1){
printf("%d %d %d %d ",msgreceived.value0,msgreceived.value1,msgreceived.value2,msgreceived.value3);