自己寫的乙個程序池的簡單測試範例

最近寫了乙個多程序的程式。建立

n個程序，主程序檢視哪個程序空閒，如果空閒，則把任務通過管道的方式把任務分發給這個程序來完成。

只是簡單測試程式。所以還有以下地方需要補充：

1. 父程序對每個子程序沒有新增

等待終止的訊號。

2. 沒有新增

ctrl+c

的訊號控制。

3. 記憶體有些沒有釋放，另外函式入口處引數沒有檢測。

4. 管道都沒有關閉，釋放什麼的。

#include

#define process_busy 1

#define process_not_busy 0

/* process managementstructure */

typedef struct _processlistprocesslist;

//max 10 process

#define max_process_number 10

processlist *pprocesslist = null;

sem_t *semsharememory;

char acsharefilename[1024] = ;

int iprocessnumber = max_process_number;

processlist *pstsharedmemory = null;

#define share_memory_sem "sharememory"

int pfd[max_process_number][2];

/******************************************

* functionname:pcreatsem

* description:create the sem

* input:the posix name of the sem

* return:ok, pointer of sem

* fail, null

*******************************************/

sem_t * pcreatsem(const char *psemname)

;semtmp = sem_open(psemname, o_rdwr | o_creat | o_excl, s_irusr | s_iwusr, 1);

if (-1 == semtmp)

}else

semtmp = sem_open(psemname, o_rdwr | o_creat | o_excl, s_irusr | s_iwusr, 1);

if (-1 == semtmp)

}if (-1 == sem_unlink(psemname))

return semtmp;}

/*init processlist */

int iinitshareprocesslist( int maxprocessnum)

ifd = open(acsharefilename,o_rdwr | o_creat,s_irwxu);

if(ifd == -1)

pstprocessrecord = (processlist *)malloc(sizeof(processlist) * maxprocessnum);

if(pstprocessrecord == null)

memset(pstprocessrecord,0,sizeof(processlist) * maxprocessnum);

for(i = 0;iipid = -1;

(pstprocessrecord+i)->iindex = i;

(pstprocessrecord+i)->istatus = process_not_busy;

}write(ifd,pstprocessrecord,(sizeof(processlist)*maxprocessnum));

free(pstprocessrecord);

pstsharedmemory = (processlist *)mmap(null,sizeof(processlist) * maxprocessnum,

prot_read | prot_write,map_shared,ifd,0);

if(pstsharedmemory == (void *)(-1))

/* v-sem operate */