1
鍗楁槍澶у瀹為獙鎶ュ憡
---
锛?/p>
2
锛?/p>
缂?/p>
绋?/p>
妯?/p>
鎷?/p>
杩?/p>
绋?/p>
闂?/p>
鐨?/p>
鍚?/p>
姝?/p>
鍜?/p>
浜?/p>
鏂?/p>
瀛︾敓濮撳悕锛?/p>
寮犵殦鐒?/p>
瀛?/p>
鍙凤細
5501215001
涓撲笟鐝骇锛?/p>
鏈
151
瀹為獙绫诲瀷锛氣枴
楠岃瘉
鈻?/p>
缁煎悎
鈻?/p>
璁捐
鈻?/p>
鍒涙柊
瀹為獙鏃ユ湡锛?/p>
2017.5.5
瀹為獙鎴愮哗锛?/p>
涓�銆佸疄楠岀洰鐨?/p>
閫氳繃瀹為獙鍔犲己瀵硅繘绋嬪悓姝ュ拰浜掓枼鐨勭悊瑙ｏ紝
骞舵帉鎻¤繘绋嬶紙绾跨▼锛?/p>
鐨勫垱寤哄拰璋冪敤鏂规硶銆?/p>
瀛︿細
浣跨敤淇″彿閲忚В鍐宠祫婧愬叡浜棶棰樸�傚鐢熷彲浠ヨ嚜宸遍�夋嫨鍦?/p>
Windows
鎴?/p>
Linux
绯荤粺涓嬬紪鍐欍�?/p>
浜屻�佸疄楠屽唴瀹?/p>
锛堜竴锛変互涓嬩负
Linux
绯荤粺涓嬪弬鑰冪▼搴忥紝璇风紪璇戙�佽繍琛屽苟瑙傚療绋嬪簭鐨勮緭鍑猴紝骞跺垎鏋愬疄楠岀粨
鏋滐紝鍐欏嚭瀹為獙鎶ュ憡銆?/p>
#include<stdio.h>//
鏍囧噯杈撳叆杈撳嚭澶存枃浠?/p>
#include<stdlib.h>//standard library
鏍囧噯搴撳ご鏂囦欢
#include<unistd.h>//POSIX
鏍囧噯瀹氫箟鐨?/p>
unix
绫荤郴缁熷畾涔夌鍙峰父閲忕殑澶存枃浠讹紝
鍖呭惈浜嗚澶?/p>
UNIX
绯荤粺鏈嶅姟鐨勫嚱鏁板師鍨嬶紝渚嬪
read
鍑芥暟銆?/p>
write
鍑芥暟鍜?/p>
getpid
鍑芥暟銆?/p>
#include<time.h>//time.h
鏄?/p>
C
鏍囧噯搴撳ご鏂囦欢锛屼富瑕佹槸涓�浜涘拰鏃堕棿鐩稿叧鐨勫嚱鏁?/p>
#include<sys/types.h>//
鍩烘湰绯荤粺鏁版嵁绫诲瀷
#include<sys/wait.h>//declarations for waiting
#include<linux/sem.h>//Semaphore operation flags
#define NUM_PROCS 5//5
涓瓙杩涚▼
#define SEM_ID
250//
淇″彿閲?/p>
#define FILE_NAME "/tmp/sem_aaa"
#define DELAY
4000000
void update_file(int sem_set_id, char *file_path, int number){
struct sembuf sem_op;
FILE *file;//
寤虹珛涓�涓枃浠舵寚閽?/p>
//
绛夊緟淇″彿閲忕殑鏁板�煎彉涓洪潪璐熸暟锛屾澶勮涓鸿礋鍊硷紝鐩稿綋浜庡淇″彿閲忚繘琛?/p>
P
鎿嶄綔
sem_op.sem_num=0;
sem_op.sem_op=-1;
sem_op.sem_flg=0;
semop(sem_set_id,&sem_op,1);
/*
鎿嶄綔涓�缁勪俊鍙凤紝杩涚▼鐨勬爣璇嗙鍙蜂负
sem_set_id
锛?/p>
sem_op
鏄粨鏋勬寚閽堛�?/p>
sem_op
锛氬鏋滃叾鍊间负姝ｆ暟锛岃鍊间細鍔犲埌鐜版湁鐨勪俊鍙峰唴鍚�间腑锛岄�氬父鐢ㄤ簬閲婃斁鎵�鎺ц祫婧愮殑浣?/p>
鐢ㄦ潈锛涘鏋?/p>
sem_op
鐨勫�间负璐熸暟锛岃�屽叾缁濆鍊煎張澶т簬淇″彿鐨勭幇鍊硷紝鎿嶄綔灏嗕細闃诲锛岀洿鍒颁俊鍙?/p>
鍊煎ぇ浜庢垨绛変簬
sem_op
鐨勭粷瀵瑰�硷紝
閫氬父鐢ㄤ簬鑾峰彇璧勬簮鐨勪娇鐢ㄦ潈锛?/p>
濡傛灉
sem_op
鐨勫�间负
0
锛?/p>
鍒欐搷
浣滃皢鏆傛椂闃诲锛岀洿鍒颁俊鍙风殑鍊煎彉涓?/p>
0
銆?/p>
*/
//
鍐欐枃浠讹紝鍐欏叆鐨勬暟鍊兼槸褰撳墠杩涚▼鐨勮繘绋嬪彿
file=fopen(file_path,"w");
//
鍐欐枃浠讹紝鑻ユ垚鍔熷垯杩斿洖鏂囦欢璧峰鍦板潃锛涘惁鍒欑疆
0