multithreading function calls
i have an array of structures with fields of data and fields with pointers to functions.
what i'm doing now is cycling through array and calli开发者_如何学Cng each registered function.
what i need is for each of element in my structures array call registered function in a separate independent thread.
i can post an code example also if needed. sorry for my english :)
posting code:
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <pthread.h>
#define NTHREAD 3
struct server_t {
char *name;
int (*triggered)(struct server_t *);
};
typedef struct server_t server_t;
int triggered1(struct server_t * server)
{
if (time(NULL) % 1 == 0) {
printf("%s\n", __FUNCTION__);
pthread_exit(0);
return 0;
} else {
return -1;
}
}
int triggered2(struct server_t * server)
{
if (time(NULL) % 2 == 0) {
printf("%s\n", __FUNCTION__);
pthread_exit(0);
return 0;
} else {
return -1;
}
}
int triggered3(struct server_t * server)
{
if (time(NULL) % 5 == 0) {
printf("%s\n", __FUNCTION__);
pthread_exit(0);
return 0;
} else {
return -1;
}
}
int main()
{
pthread_t threads[NTHREAD];
int iret[NTHREAD]; int i = 0;
server_t servers[] = {
{"server1", triggered1},
{"server2", triggered2},
{"server3", triggered3},
};
/*
So, i have an array of structures. AND i have a main loop.
i want to create thread for each element of array, pass
structure's "triggered" function as start routine for it.
AND i need this start routine to periodically check for something.
So below some kind of an em.. code, that supposed to be.
*/
<create_threads(&servers);> // this function must create thread for each element of array
//with structure's "triggered" function as a start routine
//argument
/* after what threads are running and checking what they needed in an infinite loop. */
// ?maybe some code here?
return 0;
}
Here is a very good, basic pthreads example, which should get you going: https://computing.llnl.gov/tutorials/pthreads/#CreatingThreads
Basically all you need to do is loop through your function-pointer-array and execute the functions according to the said example.
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